scholarly journals THE PREDICTED GENETIC PROGRESS IN DAIRY CATTLE POPULATIONS USING A VARIETY OF METHODS FOR EVALUATION AND SELECTION OF ANIMALS

2018 ◽  
Vol 51 ◽  
pp. 27-34 ◽  
Author(s):  
O. I. Babenko ◽  
V. P. Оleshko ◽  
V. Y. Afanasenko
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Milk Fat ◽  
Genetic Improvement ◽  
Holstein Cattle ◽  
Genetic Progress ◽  
Conventional Breeding ◽  
Black And White ◽  
Dairy Breed ◽  
Selection Of

Genetic progress in a herd of animals is due to the selection of four categories of pedigree animals: fathers of sires, mothers of sires, fathers of cows and mothers of cows. Extremely important role in genetic improvement of a herd plays selection of the sires for insemination of breeding stock which become the potential parents of cows. The selection of sires’ mothers, sires’ and cows’ parents provides 90-95% of the effect of selection in animal population, and massive selection of cows’ mothers only 5-10%. The main selection trait in а herd is milk production, therefore with the purpose of analyzing the effectiveness of selection by this trait defined pedigree value of 4 categories of pedigree animals, which influenced on the pace of improvement of the populations. Therefore, to accelerate genetic improvement of dairy cattle populations is necessary to increase the magnitude of the genetic benefits of parental animals and reduced generation intervals, which is the aim of our research. The average annual genetic progress through selection of four categories of pedigree animals in the herd of Holstein breed is 61.2 kg of milk per cow per year and the pace of genetic improvement of the herd – 0.81 %. In the population of Ukrainian Black-and-White Dairy breed, these figures are respectively 43.2 kg of milk and the pace of genetic improvement of the herd – 0.62 % Much more opportunities in raising the rate of genetic improvement can be achieved through the introduction of genomic (GS) or marker-assisted selection (MAS). Under the terms of the genomic breeding, final estimation of pedigree value of sires is carried out during 2.5 years in the contrast with traditional breeding, which involves the time for 5 years. Experts estimate the cost from the use of GS or MAS compared with conventional breeding are up to 92%, and the efficiency of selection is improved two times. Taking into account that data of productivity of animals are associated with genes of economically useful traits, the topical issue is the selection of the optimal polymorphic marker systems for their introduction into practice of breeding and assessment of genetic structure of cattle breeds. On the basis of our results of studies of the effect of QTL – gene, the complex model genotype for the selection of animals for the purpose of increasing milk yield in animals of Ukrainian Black-and-White Dairy breed is like this: CSNSАВ, GHLL, βLGАВ, Pit-1АВ; Holstein – CSNS AB, GHLV, βLGАA, Pit-1АВ. Comparison of model genotypes of Ukrainian Black-and-White Dairy and Holstein shows that there are differences in the combination of genotypes contributing to the best development of traits. Thus, the mass fraction of the protein, the model genotypes are identical at 75% in both breeds: by the yield, quantity of milk fat and protein and total milk fat and protein model genotypes match by 50%. Due to implementation of genomic evaluation and breeding of dairy cattle, the valuation period of pedigree animals was reduced significantly. Unlike conventional breeding, the introduction of genomic selection will reduce the genetic interval in the population of Ukrainian Black-and-White Dairy breed of sires’ fathers by 4.5 years, sires’ mothers by 4.6 years, cows’ fathers by 4.6 years and cows’ mothers by 2.9 years. In the population of Holstein cattle generation interval of sires’ fathers is reduced by 4.3 years, sires’ mothers by 4.5 years, cows’ fathers by 4.5 years, and cows’ mothers by 2.7 years. The results of our studies show that the rate of genetic improvement of dairy cattle population in the main breeding traits can be improved through the selection of animals by QTL-complexes. Thus, the selection of breeding stock based on a comprehensive model of genotype on yield gave an opportunity to improve pedigree value of the maternal cows at 155 kg compared to traditional breeding, and in the population of Holstein cattle at 246 kg. Only these factors allow genetic progress in milk yield in the population of Ukrainian Black-and-White Dairy cattle by 128.5 kg, which is 2.9 times more than the value of the actual genetic progress and in the population of Holstein cattle – 183.2 kg, which is three times more compared to the actual value of genetic progress for milk yield in this population. The contribution of the cows’ mothers to genetic progress increases. So, if at conventional breeding, the contribution of this category of pedigree animals was negative (-4.9%), selection on QTL complex is 3.2% and in the population of Holstein cattle 12%. If you apply the selection of other categories of pedigree animals (sires’ fathers, mothers and parents of sires) on QTL-complexes, which contribution in the genetic improvement of populations is 88.0–96.8%, the rate of genetic improvement of dairy cattle populations will greatly increase. Conclusion. To accelerate genetic improvement of dairy cattle populations it is necessary to use molecular genetic markers that control metabolic processes in the body.

scholarly journals PHENOTYPE FEATURES APPEARANCE OF DAIRY PRODUCTIVITY OF DIFFERENT UKRAINIAN DAIRY BLACK-AND-WHITE BREED COWS GENOTYPES

2019 ◽  
Vol 58 ◽  
pp. 33-40 ◽  
Author(s):  
A. R. Pendyuk ◽  
V. V. Fedorovych ◽  
N. P. Mazur
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Fat Content ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Dairy Breed ◽  
A Share

The main task of breeding in dairy cattle breeding is to raise dairy productivity of cows. Improvement of productive qualities of domestic dairy cattle with the use of Holstein breeders of high breeding value led to serious disadvantages, including impairment of animal health, reproductive capacity and quality of milk. Therefore, the purpose of our research was to examine the milk productivity of cows of different genotypes of the Ukrainian Black-and-White dairy breed and ascertain the relationship between quantitative and qualitative indicators of milk. Research conducted at agricultural limited liability company "Lishche" Lutsk district of Volyn region on cows of different genotypes of the Ukrainian Black-and-White dairy breed. 5 groups of animals were formed: I − cows with a proportion of Holstein breed 75% or less, II − with a share Holstein heredity 75.1–81.25%, III − Holstein heredity share 81.26–87.50%, ІV − with a share of the heredity of the Holstein 87.51–93.75% and V − with a share of the heredity of the Holstein more than 93.75%. Evaluation of milk productivity was carried out by milk yield, fat content in milk and the amount of milk fat for the first, second, third and highest lactations according to the data of zootechnical accounting. It was found that the largest number of animals under control (33.7%) was with the relative share of Holstein heredity of 81.26–87.50%, and the lowest (9.3%) was with relative share of the Holstein breed's heredity more than 93.75%. Analysis of the level of milk yield of cows of different genotypes showed that the increase of Holstein heredity increases milk yields, however, significantly reduces the fat content of milk. If the animals have a share of Holstein heredity up to 75% the milk yields was 5154, and the amount of milk fat − 199.7 kg, and cows with hereditary of 75.10–81.25% showed figures increased by 16.4 and 15.5%, with Holstein heredity 81.26–87.50% by 23.3 and 20.8%, Holstein heredity 87.51–93.75% for 26.1 and 23.2% and with Holstein heredity more than 93.75% for 34.8 and 31.4%, and fat content in milk, on the contrary, decreased, depending on the genotype of animals, by 1.6–2.3%. In all in the above cases, these changes were highly significant (P < 0.001). The effectiveness of breeding on increasing the milk productivity of cows depends on the efficiency of selection and selection of animals, taking into account the phenotypic and genetic correlation between economically useful features. It was found that the studied cows of all genotypes had highest highly reliable (P < 0.001) positive values of correlation coefficients between milk yield and milk fat (Table 2). These features are the most predicted because strong relationship between them (r = 0.912–0.987). There was also observed direct positive ligament (r = 0.039–0.533, P < 0.05–0.001) between fat content in milk and milk fat content, and mostly weak, and only in some cases correlation coefficients had average values. The cows of the studied genotypes had the lowest and for the most part unreliable values of relative variability by the milk yields and fat content milk. The heifers with conditional share of Holstein heredity, more than 75% had negative and weak relationship features, and the older cows were diversified from weak to average values. One of the reliable criteria for determining the level of heredity of features is the coefficient of frequency, which indicates their heredity stability in age. Coefficients of age-related frequency of milk yield, fat content of milk and the highest milk fat content of cows with a conditional share of Holstein heredity of up to 75% had indicating a higher degree of heredity of these features compared to high half-bred cows. With the increasing of heredity of the Holstein breed the genotype of controlled animals values were decreasing for the most part. The most significant and reliable (P < 0.001) genotype of animals affected milk yields (13.3–18.1% of the total variability of this feature), less – the fat content of milk (9.3–13.2% (P < 0.001) and the amount of milk fat (6.6–14.1% (P < 0.001), with the highest genotype influence on the studied features indicated in the first lactation.

COMPARATIVE DESCRIPTION OF MILK PRODUCTIVITY OF COWS UKRAINIAN RED-AND-WHITE DAIRY CATTLE AND UKRAINIAN BLACK-AND-WHITE DAIRY CATTLE AND HOLSTEIN BREEDS IN SERF «OLEKSANDRIVSKE»

2016 ◽  
Vol 52 ◽  
pp. 6-12 ◽  
Author(s):  
M. V. Gladiy ◽  
G. S. Kovalenko ◽  
S. V. Priyma ◽  
G. A. Holyosa ◽  
A. V. Tuchyk ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Yield ◽  
Fat Content ◽  
Holstein Cows ◽  
Milk Productivity ◽  
Black And White ◽  
The Third ◽  
Fat Yield ◽  
Selection Of

The main goal of dairy breeds selection should be improving breeding and productive qualities of animals under modern conditions. The majority of farms, using native breeds to produce milk, has created optimal conditions for keeping and feeding, selection and matching, growing of replacements etc. Further improvement of created native dairy breeds for economically useful traits occurs at total use of purebred Holstein bulls (semen) of foreign selection. In order to realistically assess milk productivity (milk yield, fat content in milk and fat yield) of Ukrainian Black-and-White and Red-and-White Dairy cows should be conducted a comparative analysis of Holstein cows under the same conditions of feeding and keeping. It was established that Ukrainian Red-and-White Dairy cows were characterized by the highest milk yields for 305 days of all lactations, taken into account, the among three investigated breeds. Their milk yield during the first lactation was 5933 kg of milk, during the second – 6393 kg, the third – 6391 kg and during higher lactation – 6650 kg. Ukrainian Black-and-White Dairy cows were second by milk yield (except for the second lactation), during the first lactation – 5932 kg of milk, the third – 6462 kg and higher – 6541 kg, and Holstein cows were third, during the first lactation – 5794 kg of milk, the second – 6381 kg, the third – 6335 kg and higher – 6469 kg. The fat content was almost the same and varied within 3.49-3.58% in milk of Ukrainian Red-and-White Dairy cattle, 3.50-3.60% in milk of Ukrainian Black-and-White Dairy cattle and 3.50-3.56% in Holsteins’ milk. The difference between the breeds was within 0.01-0.04%. All the investigated breeds had predominance in fat yield for three lactations over standards of these breeds: Ukrainian Red-and-White Dairy cows from 75.1 to 93.4 kg, Ukrainian Black-and-White Dairy cows – 75.1-89.0 kg respectively and Holstein cows – 41.9-60.2 kg. It was found different level of positive correlation between milk yield and fat yield in all the cases and high correlation (r = 0.604-0.921, P < 0.001) in five cases (41.7%) Negative correlation coefficients indicate that selection of animals to higher milk yield in the herd will decrease the second trait – fat content in milk. Positive and highly significant correlation between milk yield and fat yield indicates that selection of cows in the herd to higher milk yields will increase fat yield. It was revealed that bulls were among the factors impacted the milk productivity (milk yield, fat content, fat yield) of three investigated breeds. So, the force (η²x) of father’s impact on milk yield was15.4-47.9%, fat content – 22.0-43.4% and fat yield – 14.9-47.7% taking into account a lactation and a breed. The force of lines impact (η²x) was second; it was on milk yield 6.1-24.5%, fat content – 4.1-17.1 and fat yield – 5.8-23.5%. The force of breeds impact (η²x) was last; it was on milk yield 0.3-2.9%, fat content – 0.2-0.3% and fat yield – 0.6-2.7%. So, the comparative studies of milk productivity of Ukrainian Red-and-White and Black-and-White Dairy cattle with Holsteins indicate that under similar conditions of feeding and keeping, these native breeds can compete with Holstein cattle. The milk yield for 305 days of higher lactation was 6650 kg of milk in Ukrainian Red-and-White Dairy cows, 6541 kg in Ukrainian Black-and-White Dairy cows and 6469 kg in Holsteins. It was found the inverse correlation r = -0.025-0.316 between milk yield and fat content in milk in most cases. Selection and matching of animals in the herd should be carried out simultaneously on these traits. It was found positive repeatability of milk yields between the first and second, the third and higher lactations (rs = 0.036-0.741), indicating the reliability of forecasting increase in milk productivity during the next lactations in all herd. Bulls have the greatest impact (η²x) on milk productivity among the factors taken into account: milk yield – 15.4-47.9%, fat content in milk – 22.0-43.4% and fat yield – 14.9-47.7%.

scholarly journals GENESIS AND PROSPECTS OF RED DAIRY CATTLE IN UKRAINE

2018 ◽  
Vol 51 ◽  
pp. 41-60 ◽  
Author(s):  
M. V. Gladiy ◽  
Yu. P. Polupan ◽  
I. V. Bazyshina ◽  
A. E. Pochukalyn ◽  
T. P. Koval ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Gene Pool ◽  
Milk Fat ◽  
Large Scale ◽  
Breeding Value ◽  
Simultaneous Increase ◽  
The Past ◽  
Breeding Farms ◽  
Dairy Breed

Ukrainian population of red dairy cattle is genetically active, its gene pool is significantly improved in each of the next generations, mainly due to artificial selection. Currently breeding structure of Ukrainian Red Dairy breed has the prospect of future expansion due to creating Podolian zonal type. Features of its formation are to use as the original breed, which being improved, Red Polish cattle. This breed, as Red Steppe cattle, was listed as a breed to preserve the gene pool under pure breeding. However, gene pool preservation of these breeds is impossible through lack of sufficient number of purebred bulls or their semen at breeding enterprises in Ukraine. The aim of our research was to study genesis and development prospects of red dairy cattle in Ukraine. Materials and methods of research. The materials of the research were the data of identifying breed composition of cattle in Ukraine by January 1, 2015, State Breeding List for 2005, 2010 and 2015, the electronic information database of leading breeding farms for 2007 and 2011 and database of bulls admitted to using during 2005, 2010 and 2015 of Institute of Animal Breeding and Genetics named after M.V. Zubets of NAAS. Results. Currently the group of cows of red breeds is about 365 thousand head, including 97.9 thousand head concentrated in agricultural enterprises. The largest share of this group takes the Red Steppe cattle (84.5%), the smallest one –Ayrshire and Angler breeds (0.7-0.8%). In Ukraine, the total number of Ukrainian Red Dairy cattle is about 40 thousand head, including 21.4 thousand head of cattle concentrated in agricultural enterprises. The results of these annual reports have shown that the average milk yield of the group of cows of red breeds was 3328 kg of milk in 2001. Then milk yield increased with each subsequent studied period and reached the highest figure of 4681 kg in 2014. So, increasing milk yield of cows was by 1353 kg of milk or 29% during fourteen years (2001-2014). The number of breeding animals of Red Steppe, Red Polish, Ayrshire, and Ukrainian Red Dairy breeds significantly decreased in the controlled part of population during the past fourteen years. However, level of milk production and quality increased slightly, except for Red Polish breed. Thus, 4688 cows of Ukrainian Red Dairy breed had milk yield in 5981 kg and milk fat content in 3.88% according to the appraisal of 2014, whereas, in 2013, 4902 cows had milk yield in 5837 kg with milk fat content in 3.86%. Up to 90% of the realized genetic progress in large-scale breeding is provided by using proven bulls, resulting most current need is to restore the national system of selection and testing of sires. The results show that during the past ten years, the number of proven bulls, admitted to using within the red breeds decreased almost seven times with a simultaneous increase 2.2 times in breeding value. Among 410 proven bulls, admitted to using in 2005 (bulls which being tested by progeny), unreasonably disproportionate share was for Holstein sires – 245 (59.8%), whereas, the share of bulls of the red breeds – 13.7%. In 2010, 123 bulls (65.4%) were of Holstein breed and only 9 ones (4.8%) – of Ukrainian Red Dairy among 188 bulls, admitted to using. In 2014, a similar situation was observed; there were 93 bulls, admitted to using, including 48 ones (51.6%) of Holstein and only 3 ones (3.2%) of Ukrainian Red Dairy breed. Given the current state of livestock breeding base on all the red breeds (Red Steppe, Ukrainian Red Dairy, Angler, Red Polish) we developed possible options of parameters of large-scale breeding. During the planning period the number of the controlled cows of the red breeds (mainly Ukrainian Red Dairy cattle) should be significantly increased. Calculations show that in the first stage of the program available number of cows in breeding farms, even if 30% of cows allocated to mating with laid-off bulls, is less than a third of the minimum at pressure of selection among laid-off bulls 1: 4 by productivity of 50 daughters. At the end of the program it is planned to increase the pressure of selection among laid-off bulls to 1:5 under increase of the controlled livestock number to 43700 cows (nearly 4.4 times against currently available one) Conclusion. Our results showed that, the number of breeding farms, in which were bred red cattle, significantly declined and the livestock number also decreased whereas milk production increased during 2001-2015. The high level of genetic potential of Ukrainian Red Dairy cows indicates the presence of highest-yielding cows with yield more than 10 000 kg of milk. At the same time, such animals at breeding farms for breeding Red Polish, Steppe, Ayrshire and Angler cattle weren’t found. During the past ten years, the number of proven bulls of red breeds, admitted to using, decreased almost seven times with a simultaneous increase of breeding value in 2.2 times. Predominance of Holstein bulls remains indisputable on reliability of assessment of breeding value. It causes the biggest request and the widest offer on the market of semen from bulls of the breed. The actual destruction of domestic system of sires breeding caused significantly lower rate of repeatability of breeding values in bulls of the red breeds. This is a concern and threatens possible loss or significant restriction of the gene pool of red breeds.

scholarly journals PRODUCTIVITY OF COWS OF UKRAINIAN BLACK-AND-WHITE AND RED-AND-WHITE DAIRY BREEDS

2018 ◽  
Vol 51 ◽  
pp. 112-118
Author(s):  
V. V. Machulnyi
Keyword(s):  
Dairy Cattle ◽  
Dairy Cows ◽  
Milk Production ◽  
Milk Yield ◽  
Fat Content ◽  
Reproductive Capacity ◽  
Black And White ◽  
Reproductive Ability ◽  
Service Period ◽  
Dairy Breed

Milk yield of cows in breeding herds, Cherkassy region, for last completed lactation averaged 6442 kg of milk with 3.62 % fat content. Currently the question of interconnection of cows’ milk production and reproductive capacity is especially important, because the significant increase in milk yields makes minimize calves. The successful conduct of breeding had set the goal to detect the best options for combining milk production and reproductive ability of animals.To characterize the level of milk production including reproductive ability of cows we used indicator of daily average milk yield per one day of periods between calving (PBC). The best service period can be considered period of 51-90 days, that allows you to get one calf per cow per year (average PBC is 351 days) and maintain high milk production (6431 ± 39.6 kg during 305 days of lactation). With this service period all indicators of milk production and reproductive ability are at high level. Reduced service period below recommended levels will reduce the duration of lactation and milk production, and increasing service period will increase the duration of lactation with a simultaneous reduction in milk production for 305 days. Herewith deterioration of reproductive ability is marked and manifested in the increase of the insemination index, decline in the reproductive capacity, increase of periods between calving and as a result, reduce of calves and culling barren cows.Analysis of genealogical structure of the studied herds points to low diversity (Ukrainian Black-and-White dairy cows belong to 6 lines and Ukrainian Red-and-White dairy cows – to 8 ones) with high affinity (by Chief 1427381.62 to R. Sovereign 198998 bloodline, by Starbuck 352790.79 to Elevation 1491007 and Ideal1013415 bloodlines).Genealogical structure of the herds is saturated a lot of bulls genealogical groups of Holstein cattle: Chief 1427381 – 11 bulls in the array of Ukrainian Black-and-White dairy breed and 5 ones in Ukrainian Red-and-White dairy breed, Starbuck 352790.79 – 10 sires in the array of Ukrainian Black-and-White dairy cattle and 3 ones in Ukrainian Red-and-White dairy breed, Elevation 1491007.65 – 4 sires in the array of Ukrainian Black-and-White dairy cattle and 3ones in Ukrainian Red-and-White dairy breed.Currently the sires of Chief 1427381.62 (7712-3,76-289,9-3,14-242,1), Starbuck 352790 (7857-3,87-295,4-3,07-241,2), Jocko Besne 694028588.94(6687-3,88-259,5-3,03-202,6), and Bell 1667366 bloodlines (61341-3,95-242,3-3,02-185,2) among sires of Ukrainian Black-and-White dairy cattle and the sires of Cavalier 1620273.72 (7285-3,98-289,9-3,08-224,4), Chief 1427381.62 (7522-3,76-282,8-3,00-225,7),Starbuck 392405 (7667-3,87-296,7-3,00-230,0), and Elevation 1491007.65 bloodlines (7544-3,80-286,7-3,5-230,0) among sires of Ukrainian Red-and-White dairy breed are classified to a highly productive and promising for breeding and wider use by productive qualities.After the first insemination the lowest proportion of fertilized cows is among offspring belonging to Chief 1427381 bloodline which is only 38 % among both breeds. However, the milk yield of breeding stock belonging to this bloodline is 7712 kg with 3.76 % fat content for Ukrainian Black-and-White dairy cows and 7522 kg of milk with 3.76 % fat content for Ukrainian Red-and-White dairy cows. Daughters belonging to Elevation1491007, Valiant 1650414, and Hanover 1629391 bloodlines with yields of 4566-5478 kg of milk per lactation had a part of fertilized cows, after the first insemination, at the level of 41-49 %. Fertilization after the first insemination above 50% was in daughters belonging to Cavalier 1620273.72 (52%), Starbuck 392405(50-55 %), Bell 1667366(56%) and Jocko Besne 694028588.94 bloodlines (64 %). The level of performance of these animals for milk yield ranged from 6134 kg to 7857 kg.Heritability coefficients of milk yield and duration of service period were low (0.118-0.289). A positive correlation can be explained by the fact that extension of service period (to a certain level) leads to growing number of milking days (duration of lactation) and defers a decrease in productivity of cows by physiological reasons, namely as a result of pregnancy. Low rates of heritability indicate little genetic diversity of traits and the significant influence of physiological and environmental factors in their formation.As Ukrainian Black-and-White and Ukrainian Red-and-White dairy breeds have a high proportion of heredity of Holstein breed which has genetically large fetus, there is need to study the characteristics of nature passing calving in cows of these breeds. Itis found the number of first-calf heifers which needed help was 52.4%. Animals calve alone in 47.6 % of all cases. Calving was without complications if the live weight of calves not exceeding 6-7% of mother’s weight. The cows calved without help of staff exceeded by 11.7% of the width of the pelvis in the buttocks, 7.5 % of the width of the ilium, and 7.1 % of its oblique length compared with animals of same age.

VARIABILITY OF POPULATION-GENETIC PARAMETERS OF EXTERIOROF COWS IN SUMY INTERBREED TYPE OF UKRAINIAN BLACK-AND-WHITE DAIRY CATTLE

2016 ◽  
Vol 52 ◽  
pp. 144-149 ◽  
Author(s):  
S. L. Khmelnyhcyy
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Correlation Coefficients ◽  
The Body ◽  
Mass Selection ◽  
Black And White ◽  
Body Conformation ◽  
Chest Girth ◽  
Efficient Selection ◽  
Dairy Breed

The study of variability of population-genetics parameters of cows’ exterior was conducted on the livestock number of Sumy interbreed type of Ukrainian Black-and-White Dairy breed in the pedigree farm Pidlisnivskа branch of PJSC «Rise-Maksymko», Sumy district. The level of positive correlation coefficients and their reliability showed that milk yield of first-calf heifers in the experimental herd to the greatest extent depended on the height at withers (r = 0.458) and rump (r = 0.324), depth of chest (r = 0.375) latitudinal measurements of backside (r = 0.263-0.375), body length (r = 0.303) and chest girth (r = 0.388). With age, the relation between the measurements of body conformation and the amount of milk yield of first-calf heifers in this direction remains, but with a slight decrease of correlation coefficients that can be the result of natural growth of age variability of exterior traits under the influence of ontogenetic regularities of development and paratypical factors. Analysis of inheritance coefficients of the body conformation measurements of the estimated cows of Sumy innerbreed type of Ukrainian Black-and-White Dairy breed showed their genotypic variability, which varied within the recorded lactations. In the pedigree farm a sufficient, reliable according to Fisher criterion, level of inheritance coefficients was found, which would provide appropriate effectiveness of mass selection on the measurements of height at withers and rump, depth of chest, latitudinal measurements of backside which were different in the first and second lactations. Somewhat lower and less reliable levels of the inheritance coefficients of body measurements traits were obtained from cows according to the third lactation, which is explained, in a certain way, increasing age variability of the estimated traits. The level of correlation of the measurements with milk yield allows to perform indirect selection by type, and the figures of inheritance of the measurements confirm the possibility of efficient selection of dairy cattle at the age of the first lactation with the aim of improvement of exterior for the herd and breed.

Молочная продуктивность коров австралийской селекции разной линейной принадлежности

2019 ◽  
pp. 27-31 ◽  
Author(s):  
I.F. GORLOV ◽  
E.YU. ZLOBINA ◽  
A.A. KAIDULINA ◽  
T.N. BARMINA ◽  
S.A. SURKOVA ◽  
...  
Keyword(s):  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Mass Fraction ◽  
Milk Protein ◽  
Holstein Cattle ◽  
Volgograd Region ◽  
Ideal Line ◽  
Calcium And Phosphorus ◽  
Selection Of

Приведены результаты исследований молочной продуктивности и качественных показателей молока коров голштинской породы австралийской селекции 3 линий в условиях Волгоградской области. Установлено, что наиболее высокий удой молока по 1й лактации был у коров линии Рефлекшн Соверинга 198998 7262,0 кг. В сравнении со сверстницами линий Вис Бэк Айдиала 1013415 и Монтвик Чифтейна 95679 он был выше, соответственно, на 84,3 и 351,1 кг. Лучший показатель содержания жира установлен в молоке коров линии Монтвик Чифтейна 95679 3,90. Валовой выход жира был больше у коров линии Рефлекшн Соверинга 198998 в сравнении со сверстницами линий Вис Бэк Айдиала 1013415 и Монтвик Чифтейна 95679 на 4,15 и 11,42 кг. Они же отличались и наибольшим выходом молочного белка.По наивысшей лактации бльшим удоем отличались коровы линии Вис Бэк Айдиала 1013415 7689,65 кг, которые превосходили по данному показателю сверстниц линии Рефлекшн Соверинга 198998 и Монтвик Чифтейна 95679, соответственно, на 134,5 и 252,17 кг. От них молочного жира было получено больше в сравнении со сверстницами линий Рефлекшн Соверинга 198998 и Монтвик Чифтейна 95679, соответственно, на 4,42 и 9,65 кг, массовая доля белка в молоке коров этой линии была выше, соответственно, на 4,12 и 7,42 кг. Казеина содержалось больше в молоке коров линии Вис Бэк Айдиала 1013415 по сравнению со сверстницами линий Рефлекшн Соверинга 198998 и Монтвик Чифтейна 95679 на 0,02 и 0,05, продолжительность сычужной свертываемости молока у них была короче, соответственно, на 1,40 и 1,15 мин. Содержание кальция и фосфора в молоке анализируемых линий находилось в пределах физиологической нормы. Целесообразно и перспективно более широкое использование животных линий Вис Бэк Айдиала 1013415 и Рефлекшн Соверинга 198998.The article presents the results of studies of milk production and quality indicators of milk of cows of the Australian selection of Holstein cattle of three lines in the conditions of the Volgograd region. It was established that the highest milk yield in the first lactation was in cows of the Reflection Sovering line 198,998 7,262.0 kg. In comparison with the peers of the lines of Vis Back Ideal 1013415 and Montwick Chieftain 95679, it was higher by 84.3 and 351.1 kg, respectively. The best indicator of fat content is set in the milk of cows of the Montwick Chieftain line 95679 3.90. The gross yield of fat was greater for cows in the Reflection Line of Sovering 198998 compared with the peers of the lines of Vis Back Ideal 1013415 and Montwick Chieftain 95679 by 4.15 and 11.42 kg. They also differed in the highest yield of milk protein. In terms of the highest lactation, the cows of the Vis Back Ideal line 1013415 7689.65 kg differed in terms of high milk yield, which surpassed in this indicator the contemporaries of the Reflection Sovering line 198998 and Montwick Chieftain 95679, respectively, by 134.5 and 252.17 kg. Milk fat was obtained from them in comparison with the peers of the Reflection Sovering lines 198998 and Montwick Chieftain 95679 by 4.42 and 9.65 kg, respectively, the mass fraction of protein in the milk of cows of this line was higher respectively by 4.12 and 7.42 kg. There was more casein in milk of cows of the Vis Back Ideal line 1013415 compared to the peers of Reflection Sovering 198998 and Montwick Chieftain 95679 peers by 0.02 and 0.05, the duration of rennet coagulability of milk was shorter by 1.40 and 1.15, respectively min The content of calcium and phosphorus in the milk of the analyzed lines was within the physiological norm.Consequently, it is expedient and promising to use the animal lines of the Vis Back Ideal 1013415 and Reflection Sovering 198998.

The use of loci associated with quantitative effects in dairy cattle improvement

1978 ◽  
Vol 27 (2) ◽  
pp. 133-139 ◽  
Author(s):  
M. Soller
Keyword(s):  
Dairy Cattle ◽  
Genetic Improvement ◽  
Significant Contribution ◽  
Breeding Value ◽  
Genetic Progress ◽  
Young Males ◽  
Genetic Components ◽  
Minor Contribution ◽  
A Minor ◽  
Selection Of

ABSTRACTThe use in dairy cattle improvement of loci associated with quantitative effects that might be found by genetic analysis is discussed. These methods can make a significant contribution only if they result in the identification of quantitative loci whose inheritance can be followed in a simple Mendelian manner. Another possibility, the identification of genetic components of production having a higher heritability than overall production, would make only a minor contribution to increased genetic progress. Selection of young males, according to the estimated breeding value associated by linkage with particular marker alleles in their sire, will not make a detectable contribution to genetic improvement.

scholarly journals EXTERIOR FEATURES OF COWS FIRSTBORN OF SUMY INTRABREED TYPE OF UKRAINIAN BLACK-AND-WHITE DAIRY CATTLE, ESTIMATED BY THE METHOD OF LINEAR CLASSIFICATION

2019 ◽  
Vol 57 ◽  
pp. 87-94
Author(s):  
A. V. Loboda ◽  
D. A. Bardash
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Milk Fat ◽  
Selection Process ◽  
Linear Classification ◽  
Body Depth ◽  
Black And White ◽  
Body Development ◽  
The Difference ◽  
Efficiency Of Selection

To study the traits of exterior type of firstborn cows of Sumy intrabreed type of Ukrainian Black-and-White milk breed, a research was carried out in the breeding flock in Sumy region. The first-calf cows were estimated by the method of linear classification according to the age of 2–4 months after calving in two systems – 9-score, with a linear description of 18 conformation traits, and a 100-point classification system, taking into account four sets of breeding traits that characterize: dairy type, body development, condition of legs and feet, and udder morphological qualities. Results of linear estimation cows firstborn in the experimental herd on a 100-point scale indicated that traits within the group average final score was in the range of "good plus." Cows-firstborn were characterized by good development of group traits defining their dairy type (82.9 score), body trait development (84.1 score), condition of legs and feet (82.3 score), udder (82.6 score) and final type score (82.9 score). The development level of 18 conformation traits of cows showed their significant variability inside a controlled herd. In general, estimated animals in the breeding flock of PE "Burynske" of Pidlisnivskoy branch were characterized by well-defined height, body depth, angularity, rump angle, rump width, fore udder attachment, central ligament and udder depth. The results of linear classification showed that body structure of the first-born cows of Sumy intrabreed type of Ukrainian Black-and-White dairy breed at the present stage of selection had a rather good characteristic of descriptive traits that determined their dairy type. According to results of research, first-born cows with estimation "very good" exceeded peers with score "good plus" by milk yield with highly reliable difference of 583 kg (P < 0.001), and with score "good" – at 1884 kg, the difference was also highly reliable at Р ˂ 0,001 With unreliable reducing the fat content in milk from cows with score "good plus" and "good", milk fat gain at firstborn with the assessment "very good" was compared in animals with score "good plus" 20.8, and "good" – at 68.8 kg (R ˂ 0,001). Use in dairy cattle selection process of linear classification method was very effective objective definition of pedigree cows exterior features and a link between the group of linear traits and milk yield – guarantee the efficiency of selection of animals by type.

scholarly journals The influence of genotypic factors on the forming of the economic use of values of ukrainian bleck and wheat milk breeds

2018 ◽  
pp. 6-13 ◽  
Author(s):  
N. Klopenko ◽  
R. Stavetska ◽  
M. Bushtruk ◽  
I. Starostenko ◽  
O. Babenko
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Production Efficiency ◽  
Live Weight ◽  
Dispersion Analysis ◽  
Fat Content ◽  
The Body ◽  
Body Measurements ◽  
Black And White ◽  
Selection Of

The evaluation of dairy cows` exterior plays a key role in the system of breeding because well-defined breed typology and high exterior evaluation cause high production efficiency. The objective of the study was to evaluate the exterior of the cows in Ukrainian Black and White dairy breed, to analyze the effectiveness of the selection of first-calf cows according to the body measurements and to study the influence of genotype factors on the formation of the exterior. For research purpose animal groups were formed on the principle of analogues, taking into account the part of Holstein inheritance, parentage, linear belonging, and age. Depending on the part of Holstein inheritance researched livestock was divided into three groups: 75,0-87,4 %, 87,5-99,9 % and 100 %. As a result of our own research it has been established that simultaneously with an increasing of the part of Holstein inheritance the body measurements increase too. It indicates about the improving effect of the Holstein breed on the formation of the exterior in the Ukrainian black-and-white milk breed. The first-calf cows with part of Holstein inheritance 100 % have advantages over the cows with the same age with part of Holstein inheritance 75,0-87,4 % with the withers height – 4 cm (P < 0,001), sacrum height – 4 cm (P <0.001), depth of chest – 1 cm, width of chest – 1 cm, width of hips – 1 cm, length of thoracic – 3 cm, chest girth – 2 cm, width of pins – 1 cm (P <0,001); the advantage over the first-calf cows with part of Holstein inheritance 87,5-99,9 % was 3 cm in withers height, 2 cm in sacrum height and 1 cm in all other cases. An increasing of the part of Holstein inheritance is accompanied by an increasing of milk yield, milk fat and milk protein. The higher milk yield had cows with the part of Holstein inheritance 100 % – by 294 kg compared to cows of the same age with the part of Holstein inheritance 87,5-99,9 % and by 2017 kg (P < 0,001) compared to cows of the same age with the part of Holstein inheritance 75,0-87,4 %. Fat content in milk of cows with the part of Holstein inheritance 100 % was lower by 0,02 % compared to cows with the part of Holstein inheritance 87,5-99,9 % and 0,21 % (P < 0,001) compared to cows with the part of Holstein inheritance 75,0-87,4 %, it was expected – the higher milk yield, the lower fat content in milk. The effectiveness of the simultaneous complex selection of dairy cattle on several grounds depends on the existence of correlation between them. The correlation between the body measurements of cows and 305-milk yield is positive, but varied in strength. The average strength of the correlation is observed between the milk yield and withers height (r = +0,233, P < 0,001), milk yield and length of thoracic (r = +0,332, P < 0,01), in other cases, the strength of the correlation is weak, but with sacrum height (P < 0,01), chest girt (P < 0,01) and depth of chest (P < 0,05) is significant. One-factor dispersion analysis was carried out to determine the level of determinism of live weight and body measurements by genotype factors. According to the results it was established that the influence of the bull's origin on the live weight of their first-calf daughters was 72,8 %, on the body measurements – 31,5- 91,3 %, the influence of line belonging amounted 81,0 % and 36,1-69,4 %, the influence of the part of Holstein inheritance was 26,3 % and 15,9-39,5 %, respectively. All genotypic factors have a significant effect on the live weight of the first-calf cows (P < 0,05 ... 0,001), withers height (P < 0,05...0,01), width of chest (P < 0,01...0,001) and width of pins (P < 0,05...0,001). Thus, the greatest influence on the body measurements and live weight of first-calf cows has the bull's origin, just below – the line belonging, the lowest – the part of Holstein inheritance, but in all cases it is rather high. It was established that for improvement of the cows` exterior will be promote the using of bulls and lines that have the desirable indicators of live weight and body measurements of daughters, as well as animals with a high part of Holstein inheritance, which have by good exterior characteristics. For effective selection it is needed to use of detected correlations between milk yield and body measurements. Key words: exterior, body measurements, part of Holstein inheritance, bull's origin, milk productivity.

scholarly journals Production potential of first calving Simmental heifers in Serbia

2011 ◽  
Vol 27 (3) ◽  
pp. 1033-1041
Author(s):  
D. Niksic ◽  
D. Ostojic-Andric ◽  
V. Pantelic ◽  
P. Perisic ◽  
Z. Novakovic ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Milk Production ◽  
Milk Yield ◽  
Milk Fat ◽  
Dairy Herd ◽  
Production Potential ◽  
Future Production ◽  
Milk Performance ◽  
Selection Of ◽  
Selection Breeding

Cattle production in Serbia, and especially milk production, contributes significantly to the value of total agricultural production (20%) and livestock production (45%). Achieved annual rate of milk yield increase of approx.100 kg per cow cannot adequately compensate for drastic decrease of number of dairy cattle which dropped by fifth over last decade. This is especially important from the aspect of assessment of future production quotas for milk as part of Serbia?s preparation for EU accession. From the aspect of the genetic potential of dairy cattle, the most significant measure aimed at increase of milk performance in future will be execution of systematic selection-breeding work in the main population. Special attention should be directed in future to selection of parents of dairy herd, criteria for selection of heifers and their adequate rearing in sense of nutrition and housing. For the purpose of establishing of production potential of first calving Simmental cows in Serbia, data was analyzed for 37.171 Simmental cows with completed lactations in the period 2007 to 2010. Research results showed moderate trend of increase in milk performance in first calving cows - average milk production of 4.348 kg, milk fat content of 3.93% and milk fat yield of 171.1 kg. Milk performance of first calving cows in average was lower by 147 kg compared to cows in other lactations and by 1.169 kg compared to bull dams in the observed period. In analysis of bulls - most common sires of studied first-calvers, it was established that eight of ten bull sires had negative values for milk yield, which indicated the need for better cooperation and organization in work of all services which are included in selection-breeding activities in dairy cattle breeding.

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