COMPARATIVE EVALUATION OF DAIRY PRODUCTIVITY OF COWS DIFFERENT LINES IN THE CONDITIONS OF THE OREL REGION

2020 ◽  
Vol 5 (86) ◽  
pp. 73-81
Author(s):  
V.S. Buyarov ◽  
◽  
A.R. Lyashuk ◽  
◽  
◽  
...  
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Correlation Coefficients ◽  
Milk Productivity ◽  
Holstein Breed ◽  
Ideal Line ◽  
The Cost ◽  
High Degree

This article provides a comparative analysis of indicators of milk productivity and quality of the main lines of the Holstein breed cows in one of the pedigree reproducers of the Orel region – "ES "Streletskoye". Among the three evaluated lines, the best results were shown by Reflection Sovereign first-calf heifers, which exceeded in milk yield the first-calf heifers of the Montvi􀉫 Chieftain line by 13.6% and the first-calf heifers of the Vis Back Ideal line by 42.3% (P≤0.001). Milk production coefficients of first-calf heifers of the Montvi􀉫 Chieftain and Reflection Sovereign lines exceeded those of the Vis Back Ideal line by 27.1% and 42.0% (P ≤ 0.001). In turn, Reflection Sovereign first-calf heifers also exceeded first-calf heifers of the Montvi􀉫 Chieftain line by 11.7% (P ≤ 0.001). Similar results were obtained for the second and third lactations. In terms of AMF and AMP, the Montvi􀉫 Chieftain and Reflection Sovereign cows significantly exceeded Vis Back Ideal cows in 305 days of each of the first three lactations. In turn, Reflection Sovereign first-calf heifers outperformed the AMF and AMP of Montvi􀉫 Chieftain first-calf heifers. The highest positive correlation coefficients between the amount of milk fat and milk yield for 305 days of lactation were found in cows of the Vis Back Ideal line - from 0.36 to 0.90 (P≤0.05–0.001). Concerning the correlation between the amount of milk protein and milk yield for 305 days of lactation, cows of all studied groups showed high levels of interdependence, characterized by a high degree of reliability - from 0.45 to 0.99 (P≤0.01– 0.001). The total cost of base fat milk produced in 305 days of the first three lactations by Montvi􀉫 Chieftain and Reflection Sovereign cows (per head) exceeded the cost of milk produced by Vis Back Ideal cows by 87.7 and 144.1 thousand rubles, respectively.

Milk productivity of the cows of Holstein and Simmental breeds in environment of the Novosibirsk region

2020 ◽  
pp. 41-49 ◽  
Author(s):  
A. Zheltikov ◽  
N. Kostomakhin ◽  
D. Adushinov ◽  
O. Zaiko ◽  
V. Dementev ◽  
...  
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Live Weight ◽  
Fat Content ◽  
Milk Productivity ◽  
Holstein Breed ◽  
Novosibirsk Region ◽  
Daily Milk Yield

The characteristic of milk productivity of cows of Holstein and Simmental breeds in LLC “Sibirskaya Niva” in the Maslyaninsky district in the Novosibirsk region has been given. It has been revealed that under the natural and climatic environments of the Western Siberia, when creating favorable conditions for feeding and housing for cows of Holstein and Simmental breeds have sufficiently high milk productivity. It has been found that Holstein first-calf heifers surpassed their Simmental herdmates by 959 kg in milk yield for the first 305 days of lactation under the same conditions of housing and feeding, by 3,1 kg in daily milk yield, by 38,2 kg in milk fat yield, and by 28,3 kg in milk protein yield (P < 0,001). There were no statistically significant differences between animals of Holstein and Simmental breeds in terms of fat and protein content in milk, which amounted to 3,94 and 2,96 % in Holstein breed and 3,97 and 2,98 % in Simmental breed, respectively. Both breeds have shown high milk productivity during the first 3 lactations. Thus, the milk yield of Holstein cows for the first 3 lactation was 6475–9290 kg, Simmental cows it was 5516–7680 kg, fat content was 3,93–3,99 and 3,96–3,97 %, respectively. The protein content in the milk of cows of both breeds did not exceed 3,0 %. High variability has been found in milk yield, yield of milk fat and protein, the coefficient of milk content and duration of lactation, the lowest in the content of protein and fat in milk and live weight. The correlation coefficients between the fat and protein content in milk were generally positive, but did not exceed 0,28. Therefore, breeding in the herd of cows in LLC “Sibirskaya Niva” have to be conducted not only by fat content, but also by protein content in milk.

scholarly journals EFFICIENCY OF DIFFERENT ASSESSMENT METHODS OF BREEDING BULLS OF BLACK-AND-WHITE BREED BY THE OFFSPRING QUALITY

2021 ◽  
Vol 250 ◽  
pp. 172-177
Author(s):  
E. I. Anisimova E. I. ◽  
◽  
P. S. Katmakov ◽  
A. V. Bushov ◽  
◽  
...  
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Land Reclamation ◽  
Hydraulic Engineering ◽  
Milk Productivity ◽  
Offspring Quality ◽  
Black And White ◽  
White Breed ◽  
Ideal Line

The paper presents results of assessing black-and-white bulls by the quality of the offspring with application of different methods. The evaluation of bulls was carried out with application of the “daughter-mother” method in the conditions of Volzhsky Research Institute of Hydraulic Engineering and Land Reclamation. The valuation showed that the bulls Aist 7 and Muscat 8 increased milk yield of daughters, in comparison with mothers, by 951 and 486 kg, or by 26.7 and 12.9%. The rest of the servicing bulls reduced milk yield of the offspring by 46 - 1019 kg (1.1 - 24.7%). When assessing the bulls using the “daughterpeer” method, the highest milk productivity was shown by the descendants of Sazan 25 and Aist 7 of Vis Back Ideal line, which surpassed their peers in milk yield by 273 and 419 kg, or by 3.8 and 5.7%, respectively. The producers Snop 57 (his 17 daughters had average milk yield of 4224 kg for the first lactation with milk fat of 3.80%) and Muscat 8 (with an average milk yield of daughters of 4254 kg , milk fat - 3.83%) are also of significant value for the breeding work of this farm. According to the assessment results, the producer Aist 7 was assigned to the breeding category of A1 of milk yield improvers. Bulls Sazan 25 and Muscat 8 are also rated as daughters’ milk yield improvers and are categorized as A2 and A3. All bulls evaluated by comparing daughters to the breed standards are improvers of daughters’ milk yield (+ 454-1860 kg).

Dairy productivity and quality of milk of Simmental × Ayrshire × Holstein crossbreds

2021 ◽  
pp. 27-35
Author(s):  
A. A. Velmatov ◽  
I. M. Dunin
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Serum Proteins ◽  
Live Weight ◽  
Genotype 1 ◽  
Milk Productivity ◽  
Holstein Breed ◽  
Milk Cows ◽  
Quality Of Milk

The purpose of the research was to study the milk productivity and quality of milk crossbreds of Simmental × Ayrshire × Holstein cows different genotypes. The results of crossbreeding cows of Simmental breed with sires of Ayrshire and Red-and-White Holstein breeds have been presented in the article. In terms of milk yield cows of the genotype 1/16S×1/16A×7 / 8HRW surpassed their herdmates with the genotype 1/8S×1/8A×3/4HRW by 300 kg of milk, and cows with the genotype 1/4S×1/4A×1/2HRW by 703 kg (P ≥ 0,95). In animals with high-blood of Holstein breed a significant decrease in the protein content in milk has been observed by 0,1 abs.% (P ≥ 0,999), but in terms of milk protein yield they exceeded their herdmates by 3,9–13,6 kg. In terms of fat content in milk the advantage of cows of the genotype 1/4S×1/4A×1/2HRW has not been so significant and was 0,04–0,05 abs.%, and in terms of milk fat yield on the contrary crossbred cows with the genotype 1/16S×1/16A×7/8HRW exceeded their herdmates by 11,5–25,0 kg (P ≥ 0,95). According to the casein content milk cows with genotype 1/4S×1/4A×1/2HRW exceeded their herdmates by 0,05–0,08 abs.% (P ≥ 0,95), there were practically no differences in the concentration of serum proteins between the groups. Cows of genotype 1/16S×1/16A×7/8HRW were inferior to cows of genotype 1/4S×1/4A×1/2HRW in dry matter by 0,10–0,26 abs.% (P ≥ 0,05), SOMO by 0,06–0,21 abs.% (P ≥ 0,999). In the milk of cows the content of calcium ranged from 127,0 to 128,1 mg/%, phosphorus from 97,4 to 99,1 mg/%. Rennet clotting time is one of the technological indicators of milk quality was shorter in cows with the genotype 1/4S×1/4A×1/2HRW by 2,5–10,2 %. Thus, with the increase of part od blood of Holstein breed from 50,0 to 87,5 % the milk productivity and live weight of cows also increase, but at the same time the quality indicators of milk decrease. However, due to the high milk yield for lactation crossbreds with high-blood of Holstein breed produce more nutrients.

scholarly journals USEFUL FEATURES OF DAIRY COWS AND THEIR CONNECTION WITH PRODUCTIVE LONGEVITY

2018 ◽  
Vol 56 ◽  
pp. 50-64 ◽  
Author(s):  
N. P. Mazur ◽  
Ye. I. Fedorovych ◽  
V. V. Fedorovych
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Live Weight ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Economic Use ◽  
Selection Of

A fundamental genetic improvement of domestic dairy breeds is carried out by using the gene pool of the best foreign breeds, in particular Holstein. This approach has greatly improved the milk productivity of cows, but has led to a significant deterioration in reproduction, longevity, product quality, general animal health etc. Taking into account that the increase of the milk productivity of cows leads to a shortening of their use, this problem will only become aggravated over time. Therefore, it is now necessary to direct scientific research into a comprehensive assessment of animals taking into account the signs of lifelong productivity. In view of the above, the purpose of our research was to study the economic utility signs of dairy cows and their relationship with productive longevity. The research was conducted on cows of Holstein (n = 2902), Ukrainian Black- (n = 14876) and Red-and-White (n = 2176) dairy breeds. To characterize the economic useful signs of animals of the studied breeds based on the materials of the primary zootechnical and breeding records, weighed growth of animals, reproductive capacity, milk productivity and duration and efficiency of lifetime use were studied. It was established that heifers of investigated dairy breeds were characterized by a moderate intensity of growth of live weight, as evidenced by average daily increments from birth to 18 months of age: in animals of Holstein breed – 644, Ukrainian Black-and-White milk breed – 641 and Ukrainian Red-and-White dairy breed 692 g. The first fruitful insemination of heifers of the Holstein breed occurred on average at the age of 19.1, Ukrainian Black and Red-and-White dairy breeds - 20.4 and 20.8 months, while their live weight at that was 405.3; 414.3 and 438.5 kg respectively. The milk yield of the Holstein breed cows, depending on the lactation, was 4846–7920 kg, the fat content in milk was 3.63–3.74% and the amount of milk fat was 181.2–279.7 kg, the Ukrainian Black-and-White milk breed was 4008–6317 kg, 3.63–3.70% and 148.6–228.8 kg respectively, while Ukrainian Red-and-White milk is 4578–6592 kg, 3.74–3.87% and 177.2–245.9 kg. The cows of the given breeds were used in herds only 2.32–2.50 lactation. The highest life milk yield was noted in animals of the Holstein breed (18,669 kg), and the lowest (14,940 kg) in the cows of the Ukrainian Red-and-White breed. Correlation analysis of economic characteristics of dairy cows with indicators of their productive longevity confirms the possibility of conducting an indirect predictive selection of animals in order to form high-yielding herds with long-term economic use. Among the studied features, the greatest predictive value (P < 0.001) for the indicators of life expectancy, productive use, lactation, the number of lactation per life, life yield and lifetime of milk fat have yield of cows for the first (r = -0.217 – +0.205) and the best lactation (r = +0.061 – +0.609). An intermediary predictive selection of animals can also be carried out according to the duration of their first service period (r = -0.462 – +0.106) and live weight during growing season (r = -0.286 – +0.126). It was established that live weight at the first insemination and the first calving significantly influenced the indicators of life yields, economic use and lactation of animals, as evidenced mainly by higher and reliable values of correlation coefficients between these indices. It should also be noted that the correlation coefficients between the live weight of cows in the first calving and the duration of life, productive use, lactation and the number of lactations in life were somewhat higher but negative values (r = -0,130 – -0,070), compared with the between live weight at the time of first insemination and the above indicators of longevity of animals (r = -0,037 – +0,094). This suggests that the effect of live weight on the first calving of animals on their longevity was somewhat higher than the effect of live weight at the first insemination. Our data show that the selection of cows by the age of the first calving and the duration of the first lactation is not significant, since there is practically no link between these features and the indicators of productive longevity.

scholarly journals GENETIC AND POPULATION PARAMETERS OF UKRAINIAN RED DAIRY COWS DEPENDING ON CONDITIONAL BREEDING BY HOLSTINA BREED

2020 ◽  
Vol 60 ◽  
pp. 40-46
Author(s):  
T. P. Koval
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Fat Content ◽  
Milk Productivity ◽  
Recurrence Rates ◽  
Clear Trend ◽  
Blood Content ◽  
Holstein Breed ◽  
Age Related

A significant level of intergroup differentiation and specificity of cows with different proportions of conditional blood by Holstein breed on the basis of milk productivity was revealed. There is a tendency of some increase in milk yield of cows with an increase in their conditional blood content by Holstein breed over 50% and above and a decrease in milk fat content by 0.16%. Our research has established quite significant recurrence rates for the considered signs of milk productivity at the highest degrees of probability, which indicates the possibility of effective selection of cows on the basis of milk productivity for the first lactation. Age-related recurrence of signs of milking between the first and higher lactation is higher than the same in terms of fat content in milk. At the same time, there is a clear trend of a gradual increase in the coefficients of recurrence of both quantitative and qualitative composition of the milk of cows of the herd with an increase in their conditional blood content by Holstein breed. The only exceptions are low-blooded animals (up to 50%). One-factor analysis of variance revealed a very insignificant and unreliable effect of heredity by Holstein breed on the hopes of cows for both the first and higher lactation. The influence of conditional blood by Holstein breed on the variability of fat content in milk is slightly higher (11–15%) at the highest levels of reliability. Correlation analysis of signs of milk yield and fat content in milk for both the first and higher lactation revealed mostly low values of correlation coefficients with a predominantly low degree of reliability. There was some increase in the correlation and change of its direction from negative to positive in high-blooded Holstein animals. Significant variability of coefficients of phenotypic consolidation of cows of different conditional bloodlines by Holstein breed on the main signs of milk productivity is noted. There is a tendency to reduce the coefficients of phenotypic consolidation of signs of milk productivity, in addition to the fat content in milk, with an increase in conditional blood in Holstein breed to 75% and above and in low-blooded animals (up to 50%).

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.

scholarly journals CONDITIONALITY OF PRODUCTIVE LONGEVITY AND LIFELONG PRODUCTIVITY OF COWS OF BLACK-WHITE BREED BY GENETIC FACTORS

2017 ◽  
Vol 53 ◽  
pp. 222-227
Author(s):  
T. M. Komendant
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Total Duration ◽  
Statistical Processing ◽  
Lactation Period ◽  
Milk Productivity ◽  
Holstein Breed ◽  
Long Period ◽  
The Impact ◽  
Economic Use

Objective: to study the dependence of productive longevity of cows of black and motley breed on genetically determined factors - linearity and bloodiness in Holstein breed. Methods: zootechnical, biological, statistical. The materials of the studies were pedigree cards of cows  and bulls, bull catalogs, zootechnical reports on pedigree work with the herd, the cattle base of the Grodno region, and also registers of rearing and rearing of the litter. To study the effect on the longevity of cows and their lifelong productivity of the "linear accessory" factor, all animals that were eliminated in 2006-2014 were divided into groups according to the lines: Adema 25437, Annas Adema 30587, Vis Eidial 933122, Montvik Chiftein 95679, Nico 31652 , Pabst Governera 882933, Reflection Sovering 198998, S. Sensation 1267271, Hiltes Adema 37910. Depending on the bloodiness of the Holstein breed, the animals were divided into four groups: I - up to 25% of Holstein genes, II- 25,0 – 49,9% of the genes of the Holstein genus, III - Holstein blood 50% and more, IV - purebred black-motley cows. Indicators of milk productivity (life-time milk yield (kg) and lifetime yield of milk fat (kg), milk yield for 1 day of lactation (kg), total duration of the lactation period (days) were studied in the experimental animals, and the duration of economic use (lactations). Main results. The results obtained during the statistical processing of data indicate that the cows belonging to the Pabst Governera line 882933 differed in the longest period of economic use among the abandoned animals. Duration of use in animals of this line was 8.43 lactations, which is more than for cows of other lines at 1,72-6,67 lactation. It should be noted that cows belonging to the Adem 25437 lines (6,71 lactations) and S. Sensation 1267271 (5,49 lactations) were also characterized by a rather long period of economic use. Due to the long period of use of the cow, the Pabst Governera line 882933 had the highest indicator of lifelong milk yield – 51535,58 kg of milk and the yield of milk fat – 1914,03. But as for milk for one day of lactation, here the leadership belonged to individuals belonging to the line Vis Eidial 933122 and amounted to 21,19 kg of milk per day. Also, a fairly high indicator of milk yield for one day of lactation was observed in animals belonging to the line Montvik Chiftain 95679 – 21,02 kg of milk. As a result of the research it was found that the largest term of economic use was characterized by low-breed hybrids with Holstein breed (up to 25%) – 3,63 lactations. This group of animals exceeded the individuals of the remaining groups by 0,21-0,76 lactations. It is worth noting that purebred black-motley individuals also differed by a long period of productive use – 3,42 lactations. Conclusions. Analysis of the impact on productive longevity and indicators of lifetime productivity of the "linearity" factor among abandoned animals in the "Progress-Vertelishki" made it possible to establish the existence of significant differences in the duration of economic use of cows of different linear affiliation. Cows of the Pabst Governera line 882933 – 8,43 lactations, 51535,58 kg of milk and 1914,03 kg of milk fat were distinguished by the greatest period of productive longevity, and also by the highest milk yield and milk fat content. It was established that the crossing of black and white cattle with Holstein breed positively influenced the productive longevity of animals, but on condition that the blood on the improving rock did not exceed 25%. Low-breed hybrids with Holstein breed exceeded the animals of other groups by the duration of their economic use by 0,21-0,76 lactations. Thus, we recommend breeding cows of black and motley breeds in the "Progress-Vertelishki", taking into account the impact on productive longevity and milk productivity of such factors as linearity and bloodiness in Holstein breed.

MILK PRODUCTIVITY OF BLACK-AND-WHITE CATTLE WITH DIFFERENT GENOTYPES OF PROLACTIN AND SOMATOTROPIN

2021 ◽  
pp. 21-25
Author(s):  
Л.Р. ЗАГИДУЛЛИН ◽  
Р.Р. ШАЙДУЛЛИН ◽  
Т.М. АХМЕТОВ ◽  
С.В. ТЮЛЬКИН ◽  
А.Б. МОСКВИЧЕВА
Keyword(s):  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Milk Protein ◽  
Milk Productivity ◽  
Black And White ◽  
Gh Gene ◽  
White Cattle ◽  
Fat Yield ◽  
Prl Gene

Изучена взаимосвязь аллельных вариантов генов пролактина и соматотропина с показателями молочной продуктивности коров черно-пестрой породы по 1 и 3 лактации. У первотелок, как и у полновозрастных животных,  наиболее высокий удой (4642 и 6240 кг), количество молочного жира (174,1 и 215,0 кг) и молочного белка (149,0 и 182,5 кг) достигнуты в группе с генотипом PRL АА. По массовой доле жира и белка в молоке коровы с генотипом PRL ВВ достоверно превосходили животных с генотипом PRL АА на 0,12% (Р<0,05) и 0,05% (Р<0,05) соответственно. По гену соматотропина наибольший уровень молочной продуктивности выявлен у коров с генотипом GH LL при достоверном преимуществе над GH VV у первотелок по удою на 439 кг (Р<0,01), выходу молочного жира — на 13,6 кг (Р<0,001), выходу молочного белка — на 15,3 кг (Р<0,01). У полновозрастных коров превышение над остальными группами было только по удою — на 219—548 кг (Р<0,05). Наибольшая жирномолочность характерна животным с генотипом GH VV по 1 лактации — 3,83% и по 3 лактации — 3,82%, а лучшая белковомолочность — коровам, имеющим аллель V гена GH:  3,21 и 3,23% соответственно. Полученные данные свидетельствуют о более высоком уровне молочной продуктивности у коров с генотипом PRL АА и GH LL, но лучшая жирномолочность и белковомолочность отмечены у особей, имеющих в своем генотипе аллели В гена PRL и V гена GH. The interrelation of allelic variants of prolactin and somatotropin genes with indicators of milk productivity of black-and-white cows for the 1st and 3rd lactation was studied. The highest milk yield (4642 and 6240 kg) amount of milk fat (174.1 and 215.0 kg) and milk protein (149.0 and 182.5 kg) were in the group with the PRL AA genotype in first-calf heifers as well as in full-age animals. In terms of the mass fraction of fat and protein of milk, the cows with the PRL BB genotype significantly exceeded animals with the PRL AA genotype by 0.12% (P<0.05) and 0.05% (P<0.05), respectively. According to the somatotropin gene, the highest level of milk productivity was revealed in cows with the GH LL genotype with a significant advantage over GH VV in first-calf heifers in milk yield by 439 kg (P<0.01), milk fat yield by 13.6 kg (P<0.001), milk protein yield by 15.3 kg (P<0.01). The excess over the other groups in full-age cows was only in terms of milk yield that was by 219-548 kg (P<0.05). The highest protein content of milk is a characteristic of animals with the GH VV genotype, 3.83% is for the 1st lactation and 3.82% is for the 3rd lactation, and the best protein content of milk in cows with V allele of the GH gene is 3.21 and 3.23%, respectively. The obtained data  indicated a higher level of milk productivity in cows with the PRL AA and GH LL genotypes but the best fat and milk content was noted in cows with alleles B of the PRL gene and V of the GH gene in their genotype.

scholarly journals The impact of reproductive capacity indicators of simmental cattle on their milk productivity

2017 ◽  
Vol 19 (74) ◽  
pp. 52-56
Author(s):  
V. V. Fedorovych
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Correlation Coefficients ◽  
Reproductive Capacity ◽  
Optimal Parameters ◽  
Milk Productivity ◽  
Service Period ◽  
Simmental Cattle ◽  
The Impact

It is well known with an increase of milk productivity of cows their reproductive capacity in general became worse. Therefore, it is important to establish optimal parameters of the first age insemination and first calving, duration of service- and inter-calving periods. In view of the above, the purpose of our researches was to study the influence of reproductive capacity parameters of Simmental cows on the formation of milk productivity. The study were conducted on 331 cows in agricultural LLC «Litynskyy» Drohobych raion, Lviv oblast. Evaluation of milk productivity and reproductive capacity of the animals (in 20 years) were performed according to the data of zootechnical accounting for the first, second, third and the best lactations. The differences in rates of milk productivity depending on the parameters of their reproductive capacity were established. Animals with age of first fruitful insemination 18.1–20.0, with first calving age – 27.1–29.0, duration of service period – 101–120 and duration of the inter-calving period – 381–400 days had the best yields and the highest quantity of milk fat. According to the above mentioned indicators of milk productivity they are likely dominated by animals with bigger or smaller indicators of reproductive capacity, but in most cases, this advantage was unreliable. It was found positive highly significant links between indicators of reproductive capacity of cows and milk yield. The highest correlation coefficients were observed between age of first calving and their milk yields, depending on lactation, they were 0.380–0.498, lower – between age of first insemination and milk yield – 0.316–0.456 and the lowest – between service- and inter-calving periods and yield – 0.124–0.335; 0.127–0.331 respectively. The impact of the abovementioned indicators on yield was within 23.13–39.88; 28.63–45.02; 30.98–35.17%, respectively. 

Milk productivity of cows of Black-and-White breed depending on the part of Holstein blood

2020 ◽  
pp. 16-29
Author(s):  
T. Shishkina ◽  
T. Guseva ◽  
A. Galiullin ◽  
N. Semikova
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Milk Productivity ◽  
Black And White ◽  
Holstein Breed ◽  
Genetic Potential ◽  
White Breed ◽  
New Generation ◽  
Economic Use ◽  
Best Parameters

A retrospective analysis of the dynamics of traits of milk productivity of Black-and-White cows with increased the part of Holstein breed blood has been carried out. Two groups have been formed from the number of culling animals of two adjacent generations: the 1st group (basic generation) with the part of Holstein breed blood of 3/4 (75 %) and the 2nd group with the part of Holstein breed blood of 7/8 (87,5 %) per 35 heads in each. As a result, it has been found that cows with the part of blood of 7/8 had the best indicators of milk productivity for I, II and III lactation. They significantly exceeded the indicators of cows with part of Holstein blood of 3/4 in terms of milk yield and yield of milk fat. The decrease in average daily milk yields for months of lactation in high-blooded cows was lower by 3 %, and the indicator of full-competed lactation was higher by 17,8 %. High-blooded animals have been culled out of the herd more intensively. By the end of the third lactation, the livability of livestock in the 1st group was 100 %, and in the second group – 23 %. The best parameters of productive longevity were distinguished by animals of the basic generation with the part of Holstein breed blood of 3/4. They signifi cantly surpassed of high-blooded animals in terms of longevity and period of productive longevity, respectively, by 1109 (P < 0,001) and 739 (P < 0,001) days, and in terms of lifetime milk yield – by 14392 kg (P < 0,001). The increase of the part of the blood of cows to 7/8 was carried out using purebred producers of foreign selection, the new generation of high-blooded animals had a relatively high genetic potential. However, 7/8-blooded cows of Holstein breed used it only by 53,4 %, which was by 24,3 % (P < 0,001) lower than the base generation. Thus, in the current environments of CJSC “Konstantinovo” high-blooded animals of Holstein breed do not suffi ciently realize the genetic potential, and the increase in productivity is associated with the loss of milk due to the decrease in the duration of economic use of animals. Based on this, we propose at the present stage to suspend the upgrading crossbreeding and return to the using Holsteinized sires domestic selection with the part of Holstein breed blood of 75 to 85 %.

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