scholarly journals VARIABILITY OF LONGEVITY TRAITS OF COWS OF UKRAINIAN BLACK-AND-WHITE DAIRY BREED IN VARIOUS VARIANTS OF SELECTION

2019 ◽  
Vol 57 ◽  
pp. 143-151 ◽  
Author(s):  
L. M. Khmelnychyi ◽  
A. V. Loboda
Keyword(s):  
High Reliability ◽  
Statistical Significance ◽  
Black And White ◽  
Genetic Potential ◽  
Breeding Selection ◽  
The Difference ◽  
High Level ◽  
Dairy Breed ◽  
Selection Of

In modern conditions of intensive dairy farming, the first and most important task was to ensure a high level of productivity of cows with simultaneous long-term use. Taking into account the important breeding aspect of the measure for intra-and interlinear breeding, it was considered appropriate to study the efficiency of combining the lines at the breeding of animals of the Sumy intra-breed type of Ukrainian Black-and-White diary breed by traits of longevity. The research on determining the effectiveness of combining the lines at breeding of cows on grounds of duration of use and lifetime productivity was carried out in the herd of pedigree plant PE "Burynske" of Pidlisnivskyi department in Sumy district. According to the results of evaluation of cows obtained by intrabreeding selection of eight genealogical formations of the experimental herd, was found significant effect of heredity lines on indicators of longevity. According to the estimation of longevity, the offspring of four lines were the best: Valiant, Sjuprim, Starbuck and O. Aivengo. Advantage of daughter progeny of sires Valiants line with the highest longevity over the animals of lines of Montfrech, Matt, M. Chiftein and S. T. Rokita on this basis amounted to 252–526 days (P < 0.01–0.001). The next by lifetime rating was the offspring of O. Aivengo's line sires had an advantage over cows of the above lines with variability of 220–393 days (P < 0.05–0.001). The same lines (Valianta, Sjuprim, Starbuck and Aivengo) almost did not differ among themselves by the number of used lactations (4.6–4.8) and exceeded cows of remaining lines by 0.6–1.4 lactation. The difference between the maximum and minimum values was reliable at P < 0.001. The highest yield for a productive life was obtained from cows belonging to the Aivengo line 1189870, which with a high reliability of difference predominated the offspring of all estimated lines with variability from 3532 (P < 0.001; Syuprim line) to 13617 kg of milk (P < 0.001; line Montfrech). High lifetime milk yields differed also descendants of sires lines Sjuprim (29684 kg), Starbuck (26811 kg) and M. Chiftein (26516 kg). Among the crossed variants with the minimum longevity indicators, offspring derived from bulls-sires of interlinear selection ♂Montfrech × ♀Mett and the reverse cross – (♂Mett × ♀Montfrech) are distinguished. This was explained to a certain extent by the fact that continuators of these lines were only crossbred sires of Ukrainian Black-and-White diary breed. In variants using the parent lines of Monfrech and Matt with maternal lines, the successors of which are Holstein sires, longevity indicators in the offspring obtained from these crosses are improving. According to the lifetime yield of dairy fat, the highest rates were obtained from offspring with interlinear selection of those sires who have the highest lifetime yield of milk. These daughters are from the crosses ♂Starbuck × ♀Sjuprim (1197.4 kg) and ♂S. T. Rokita × ♀Aivengo (1189.6 kg). An indicator of the effectiveness of longevity was also milk yield per day of life of dairy cows. Variability in interline selection varied from 8.7 (♂Metta × ♀Monfrech) to 12.0 kg (♂S. T. Rokita × ♀Aivengo). The difference between these variants was 3.3 kg with high reliability (P < 0.001; td = 5.95). Conclusions. Identified and confirmed statistical significance regularities concerning to influence the level of traits duration of use and lifetime productivity of an alternative selection system of linear breeding convinced about feasibility of regular monitoring to assess the combination of lines in the further breeding selection cows of Sumy intrabreed type of Ukrainian Black-and-White dairy cattle. Re-selection of the best options and rejection of ineffective ones will help to increase the genetic potential of longevity traits.

scholarly journals Variability of dairy productivity of cows depending on the breeding method by lines

2019 ◽  
pp. 14-20
Author(s):  
L. Khmelnychyi ◽  
A. Salohub
Keyword(s):  
Milk Yield ◽  
Parental Line ◽  
Milk Productivity ◽  
Breeding Method ◽  
Black And White ◽  
Statistical Reliability ◽  
Genetic Potential ◽  
The Difference ◽  
Breeding Farms ◽  
Dairy Breed

The effectiveness of intraline and interline selection at breeding of Sumy intrabreed type of Ukrainian Black-and-White dairy breed were carried out in the breeding farms of Pidlisnivskoyi branch of PJSC “Raise-Maximko” and “Pershe Travnya” in the Sumy district. According to the results of researches of cows of Ukrainian Black-and-White Dairy breed, regularities of influence on the level of traits of dairy productivity of different variants of selection were determined and confirmed by statistical reliability. According to the evaluation of cows under control herds obtained during intra-linear and interlinear selections, it was found that most often among the evaluated variants the offspring obtained from interlinear crosses were the best on the grounds of milk productivity. In the herd of breeding farm “Pershe Travnya” sires of Starbak's parental line 352790 were successfully combined in all investigated variants of interlinear crosses with maternal Eleveyshna 1491007, Valianta 1650414, S.T. Rokita 252803 and P.F.A. Chifa 1427381, as evidenced by the high milk yield of cows, received from these combinations, which was according to the first lactation 5837-6223 kg of milk and higher - 6525-7474 kg. The difference in milk yield of first-born cows obtained in the interlinear crosses with Starbak's parent line 352790 ranged from 404 (P <0.05) to 790 kg (P <0.001). In the system of linear breeding the reasonableness of carrying out regular monitoring to evaluate the combination of lines in the breeding process of dairy breeds is motivated. Reapplication of the most successful and abandonment of ineffective selection options will help to increase the genetic potential of dairy productivity of cattle produced by Ukrainian breeds. Key words: Ukrainian Black-and-White Dairy breed, lines, milk productivity.

Features of the conformation type of first-born cows of Ukrainian Black-and-White and Red-and-White Dairy breeds

2019 ◽  
pp. 21-32
Author(s):  
L. Khmelnychyi ◽  
A. Loboda ◽  
D. Bardash
Keyword(s):  
High Reliability ◽  
Considerable Variability ◽  
Milk Productivity ◽  
Good Characteristic ◽  
Body Depth ◽  
Black And White ◽  
Final Score ◽  
The Difference ◽  
Dairy Breed ◽  
Significant Superiority

Research of first-born cows of Ukrainian Black-and-White and Red-and-White Dairy breeds by linear traits was carried out. Research was conducted at the enterprises of the "Ukrlendfarminh" company: PE "Burynske" of Pidlisnivskoho Branch of Sumy District and LLC "Mlynivsky Complex" of Romny Branch of Sumy Region. According to the 100-point linear classification system, an interbreed difference was determined with the best indicators of animals of Ukrainian Black-and-White Dairy breed. The average scores of both breeds for the group traits and final assessment ranged from "good with plus" (80–84 scores). According to the estimation of group traits of dairy type, the predominance of animals of Ukrainian Black-and-White Dairy breed over Red-and-White was 1.3 scores (P <0.001); according to assess the condition of limbs and hooves, the difference was in favor of cows of Ukrainian Red-and-White Dairy breed with a difference of 1.3 scores (P <0.001). The best developed udder was found in cows of Ukrainian Black-and-White Dairy breed, which outperformed the peers of Ukrainian Red-and-White one by 1.4 scores with high reliability (P <0.001). As a result, the final score was higher in cows of Ukrainian black-and-White Dairy breed (83.0 scores) with a slight but significant superiority of peers Ukrainian Red-and-White Dairy breed, which was 0.4 scores (P <0.01). The developmental level of 18 descriptive traits of cows showed their considerable variability both within breeds and within each breed. In general, the evaluated animals of Ukrainian Black-and-White Dairy breed are characterized by well-pronounced height (6.3 scores), body depth (7.2 scores), angularity (6.8 scores), slope (5.1 scores) and rear width (6,5 scores), front udder parts attachment (6.5 scores), central ligament (6.4 scores) and udder depth (6.6 scores). The first-born cows of Ukrainian Red-and-White Dairy breed have better developed chest in width (6.9 scores) and body depth (7.5 scores), stronger hooves (6.4 scores). The conformation of animals of Ukrainian Black-and-White Dairy breed had a good characteristic of descriptive traits that determined their milkiness and for Ukrainian Red-and-White Dairy breed – strength. Key words: Ukrainian Black-and-White Dairy breed, Ukrainian Red-and-White Dairy breed, linear assessment, conformation, type, milk productivity.

scholarly journals EFFICIENCY OF THE USE THE CROSSBREEDING OF UKRAINIAN BLACK-AND-WHITE DAIRY AND SWISS CATTLE IN THE STATE STUD FARM "PASICHNA"

2021 ◽  
Vol 61 ◽  
pp. 35-48
Author(s):  
I. V. Verbych ◽  
O. V. Medvid
Keyword(s):  
Functional Properties ◽  
The Body ◽  
Natural Resistance ◽  
Adaptation Capacity ◽  
Black And White ◽  
Dairy Fat ◽  
Service Period ◽  
Effective Selection ◽  
High Level ◽  
Dairy Breed

Goal. To study the influence of intermediate crossing on the level of dairy productivity, qualitative milk indicators, exterior features and resistance of the body of pureorgain and local animals. Methods. Selection and genetic analysis, comparative, statistical. The results. Scientific and production studies were conducted on the basis of a tribal factory of the State Enterprise "Pasichnya" IKSGP NAAN "of the StarosinyaVsky district of the Khmelnytsky region in the chains of distinct animals of the Podilsky factory type of Ukrainian Black-and-White dairy (UCHRMP) and local animals derived from the crossing of the BPRMP cows with Bojabs of the Shvitsky breed. According to the results of experimental studies, it has been found that local cows-first-bristles are somewhat inferior to the purest animals of the Ukrainian Black-and-White dairy breed by the magnitude of the NADA (93.8 kg), but it is compensated by milk quality (fat +0.26%, protein +0.19%), where in the general yield of dairy fat (+9.5 kg) and protein (+6.4 kg), they are favorably different from its purgatory rior. The analysis of the results of the reproductive capacity of cows shows that local animals were first fruitfully inseminated at the age of 545 days and the duration of fertility was 283 days, at that time, purely meters were inserted at the age of 567 days, and the duration of the sharing was 281.5 days. Service-period in the cows-first-born of genotypes, respectively, amounted to 97 and 112 days. The obtained data for the morphological and functional properties of the cow-first-prints show that the assessed number of both groups meets the needs of target standards on technological features and have high indicators of the studied functional properties. Comparative analysis of exterior valuation indicators between the studied groups shows that local cows have higher rates over latitudinal gates, in particular, by breast width and width in the ice, at that time inferior to the children's rior in the rectors of height in the racing, in the area of the torso. and hammer. In the study of natural resistance in the studied cows it has been established that the estimated animal groups are characterized by a sufficiently high level of protective functions of the body and adaptation capacity to technological conditions, which creates good opportunities for further effective selection. The general assessment of the natural resistance of cows-firstbody by morphological and biochemical parameters of blood, phagocytic, bactericidal and lysozymic activity showed that local cows according to Method VE Chumachenko and others. (1990) have a natural resistance to 3 points (61) higher than in their pure-breeding rior (58 points). Conclusions. Results of analysis of dairy performance of local cows-first-birthsters derived from the crossing of Ukrainian Black-and-White breeds with bulls of the Shvitskaya breed showed that the data of the animal though inferior to the christening rior of the Ukrainian Black-and-White dairy breed by the magnitude of the NADA but this difference is compensated by the quality of milk, where The total output of dairy fat and protein, they are favorably different from pureoral analogues. By indicators of reproducible ability, it has been found that local animals were first crazy at the age of 823 days that on 21 days earlier than puredom and 15 days they have a smaller service period. An analysis of the results of the estimation of morphological and physiological properties of the elder showed that there are no significant differences in the investigated groups of primary differences. All animals correspond to technological requirements. The exterior evaluation of the investigated groups of the firstborn showed that purely cows, having higher rates in the elevation in the roll, in the height in the ice and a contrary length of the trunk and the intensity, but inferior to the latitude gauge: the width of the breast, width in the machaches and width in the machaches and width in the machach. Animal estimation according to natural resistance indicators found that animals of both groups have a sufficiently high level of protective functions of the body and adaptation capacity to technological conditions that creates good opportunities for further effective selection.

scholarly journals Effect of Thermal Treatments on Sn-Alloyed Al-Mg-Si Alloys

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1801
Author(s):  
Florian Schmid ◽  
Peter J. Uggowitzer ◽  
Robin Schäublin ◽  
Marion Werinos ◽  
Thomas Ebner ◽  
...  
Keyword(s):  
Natural Aging ◽  
Positive Influence ◽  
Processing Route ◽  
Thermal Treatments ◽  
Intermetallic Particles ◽  
Aging Kinetics ◽  
High Level ◽  
Fast Quenching ◽  
Selection Of

Sn-alloying, by deploying comparatively high vacancy binding energy, mitigates the undesired natural aging behavior of 6xxx-alloys. Targeted selection of pre-aging parameters can have a positive influence on natural aging and paint-bake performance. In this study, we aimed to combine the two approaches of Sn-alloying and pre-aging. Our results indicate that alloys modified with 100 at.-ppm Sn require altered heat treatment. In terms of solution aging and quenching, we show that the cooling rate needed depends on the types of alloy. The rate must be adapted, according to the number of intermetallic particles, to guarantee a sufficiently high level of Sn atoms in solid solution. The rather high number of intermetallic phases in alloy EN-AW-6061 means that it requires fast quenching, while the comparatively low number of precipitate-forming elements in alloy EN-AW-6016 makes it less sensitive to quenching variations. We also show that Sn reduces pre-aging kinetics. The optimal pre-aging temperature and time were consequently found to increase when Sn is added. We also studied the effect of adding a further thermal spike to the usual long-term pre-aging, at different positions within the processing route. The results we present are discussed based on a simulation of vacancy evolution in the alloy when subjected to these treatments.

SELECTION OF BLACK-AND-WHITE MOTLEY BREED OF CATTLE USING DIFFERENT METHODS OF BREEDING SELECTION

2016 ◽  
Vol 1 (1) ◽  
pp. 37-40
Author(s):  
Любимов ◽  
Aleksandr Lyubimov ◽  
Юдин ◽  
Vitaliy Yudin ◽  
Никитин ◽  
...  
Keyword(s):  
Conventional Wisdom ◽  
Positive Development ◽  
Mass Selection ◽  
Black And White ◽  
Related Pair ◽  
Udmurt Republic ◽  
Line Selection ◽  
Breeding Selection ◽  
Selection Of

The purpose of research is improving the efficiency of the breeding process with the planned inbreeding. Based on the works of Russian and foreign authors it is necessary to more closely approach the implementation of this method in practice. Many farms in the breeding of cattle meets application-related selection, often this phenomenon is spontaneous mean mass selection without studying the ancestry of individual animals or the proper documentation for the selection of the herd, and sometimes livestock-breeders deliberately form a related pair, despite the fact that in the literature there is still no clear conventional wisdom about the dangers of inbreeding or positive development. To properly assess the effectiveness of inbreeding it should be primarily studied the results of the use of inbred animals. The studies were conducted in a herd of Black-Motley breed cattle AIC «LUCH» Vavozhsky District of Udmurt Republic. The material for the study were pedigree card form 2-MOL, the data records, zootechnical and breeding records. Among outbreed animals were selected animals obtained by using the in-line selection and cross- line one. Inbreed individuals were classified depending on the degree and type of inbreeding. Cows resulting from the use of inbreeding, outbreeding outperform their half relative by yield of milk at 187.1 kg (3.5%). Between the calving, the longest period was detected in the group of cows resulting moderate inbreeding - 421.2 (R≥0.95) of the day, which is above the average for the group of outbreed and inbreed animals by 22.6 and 11.1 days, respectively.

NUMO’s Open Solicitation of Volunteer Municipalities for a Potential Disposal Site

2003 ◽  
Author(s):  
Kazumi Kitayama
Keyword(s):  
Radioactive Waste ◽  
Preliminary Investigation ◽  
Disposal Site ◽  
Nuclear Waste Management ◽  
The Public ◽  
Construction Operation ◽  
High Level ◽  
Year 2000 ◽  
Selection Of

In the year 2000, the Japanese geological disposal program for high-level radioactive waste (HLW) moved from the phase of generic research and development into the phase of implementation. Following legislation entitled the “Specified Radioactive Waste Final Disposal Act” (hereafter “the Act”), the Nuclear Waste Management Organization of Japan (NUMO) was established as the implementing organization in October 2000. The assigned activities of NUMO include repository site selection, developing relevant license applications and construction, operation and closure of the repository. To initiate the first stage, NUMO has chosen an “open solicitation” approach for finding candidate sites in the belief that the support of local communities is essential to the success of this highly public, long-term project extending over more than a century. Based on this concept, NUMO announced the start of open solication for volunteer municipalities for selection of Preliminary Investigation Areas to the public on December 19, 2002. This paper describes NUMO’s open solicitation of volunteer municipalities for a potential disposal site.

scholarly journals DAIRY PRODUCTIVITY AND EXTERIOR TYPE OF FIRST-CALVE COWS OF UKRAINIAN BLACK-AND-WHITE DAIRY BREED DEPENDING ON UDDER-MASO-METRIC INDEX

2019 ◽  
Vol 57 ◽  
pp. 102-110
Author(s):  
M. S. Pelehatyi ◽  
O. А. Kochuk-Iashchenko
Keyword(s):  
Classification System ◽  
Linear Classification ◽  
Milk Productivity ◽  
Score System ◽  
Group Iii ◽  
Black And White ◽  
The Difference ◽  
Complex Features ◽  
Dairy Breed

The theory and practice of breeding show that optimal results can be achieved by a complete evaluation of the genotype. The leading method of such an estimation is an index expression, which accumulates in one indicator the optimal ratio of breeding signs. In this aspect, it is important to use the breeding indices, which are estimated by the exteriors of animals, since breeding only on the indicators of milk productivity, namely on the level of fertility, contributes to the degradation of reproductive ability and, generally speaking, to the early extinction of the herd of animals. This determines the relevance of our work. The aim of the work was to study the effectiveness of selection first-born cows by the udder-mass-metric index in the herd of Ukrainian Black-and-White dairy breed.The research was carried out on 198 first-born cows Ukrainian Black-and-White dairy breed PAC "Yerchi". We used the basis of breeding records and the results of their own research.The differentiation of cows by the size of the wizard-mass-metric index was carried out according to the methodology of O. P. Polkovnikova wiith co-authors. Groups are conventionally called early, optimal and late.The results of our research showed that the first-born cows of the Ukrainian Black-and-White dairy breed, separated by the size of this index, significantly differ in their complexes features of the 100-score system of linear classification of the exterior type. The studied animals of the three groups for all the complexes of the 100-score system received rather high ratings: from 78.8 to 81.9 points, which corresponds to the classes "good" and "good with the plus" in accordance with international requirements.In general, there is a clear tendency that with an increase in the value of the udder-mass-metric index there is an increase in the overwhelming majority of complex features of linear classification, except for the complex features of the exterior, which characterizes the development of the body and gives an idea of the size of animals. Better were animals of groups II.With the increase in the size of the udder-mass-metric index in cows, the level of assessments of the main descriptive traits is also significantly increased. The best indicators of the descriptive features of the linear classification of the exterior were the group of animals of the Ukrainian Black-and-White dairy breed, which, according to the value of the udder-maso-metric index, are classified as high-value groups of magnitude 16.9 or more. units, the worst – animals of the first group (11.7 and less than units of scientists). The difference between animals of the best and worst groups in 50% of cases was reliable (P < 0.05–0.001).The dynamics of dairy productivity in a certain way "copies" the dynamics of group and descriptive signs of the exterior type of animals. That is, with the increase of the size of the udder-mass-metric index there is a linear increase in quantitative characteristics of milk productivity.The animals of the group III showed the best results in PAC “Yerchyky”. From them received 305 days of the first lactation of 6036 kg with fat content of 3.63% and the amount of milk fat and protein, respectively, 218 and 185.0 kg. The lowest counts are first-born cows of group I (5390, 3.57, 193.5 and 166.3 respectively). Animals of group II occupy an intermediate position. The difference between the groups of animals for milk productivity, differentiated by the size of the exterior index in 40% of cases was reliable.The distribution of animals by the size of the extermination index (UMMI) completely copies their location according to the overall assessment of the exterior type and the 305 days lactation, which again confirms the existence of a direct correlation between these features. That is, differentiation and selection of animals by the size of the udder-mass-metric index can be an effective method for improving the milk production and exterivation of animals in the milk breed herd of PAC “Yarchiki”.With the help of the exterior index, we can predict milk productivity, that is, with the increase in the value of UMMI per unit milk productivity, namely, milk for 305 days of lactation, increases by 323 kg.Increasing the value of the udder-mass-metric index is accompanied by an increase in the consolidation factor for all the blocks of attributes. That is, the selection with the maximum value of the index of group III will help to increase the typification of animals by the exterior type and productivity.We also studied the influence of the exterior index on the manifestation of exterior and productivity. The results of this analysis showed that the share of this index in the overall variability of the signs varies within the range of 1.87–16.88 among the signs of the 100-score linear classification system and 0.31–7.92 among the signs of milk productivity, but it should be noted, that in 70 and 80% of cases the force of influence was reliable, respectively (P < 0,05–0,001). On average, the impact strength of the 9-point linear classification system was 2.94%.

scholarly journals ESTIMATION OF HOLSTEIN BREED BULLS BY DAIRY PRODUCTIVITY OF THEIR DAUGHTERS

2020 ◽  
Vol 59 ◽  
pp. 26-34
Author(s):  
S. L. Voitenko ◽  
O. V. Sydorenko
Keyword(s):  
Milk Yield ◽  
Phenotypic Variability ◽  
Milk Productivity ◽  
Paternal Origin ◽  
Black And White ◽  
Holstein Breed ◽  
The Third ◽  
Holstein Bulls ◽  
The Difference ◽  
Dairy Breed

The scientific community has shown that the genetic improvement of dairy cattle depends on many genotypic factors, including paternal ancestry and lineage. With this in mind, the purpose of our research was to evaluate the Holstein bulls of black-and-white and red-and-white suits of different lines for the milk productivity of their daughters. The research was carried out on the basis of primary breeding records of 10 breeding herds of Ukrainian Black-and-White Dairy breed, 3 – Ukrainian Red-and-White Dairy breed and one – Ukrainian Red Dairy breed, which are subordinated to NAAS. Cows of the studied breeds has divided into groups according to lineage and paternal origin. Studies have revealed a significant differentiation of milk yield of cows of the first and highest lactation not only of one breed, but also of linear affiliation and paternal origin. It was found that the yield of the first lactation in cows of the Ukrainian Black-and-White Dairy breed varied from 3211 kg (Damir 7100354042) to 7884 kg (Dzhokus 113080315) of milk. Noteworthy are the daughters of Dzhokus 113080315, from which 9143 kg of milk were obtained for higher lactation, Polyarsten 342347941 and Manteno 344222859 – 8248 kg and 8290 kg of milk, respectively. The significant influence of paternal origin on the yield of Ukrainian Black-and-White Dairy breed cows of the first and higher lactation (31.0%; P > 0.999) and 37.3% has been proved; P > 0.999). The influence of genealogical formation on the milk productivity of cows was significant and amounted to 10.8% for the first lactation, higher – 10.2%. Some of the first-born Ukrainian Black-and-White Dairy breed has characterized by high milk productivity, which steadily increased until the third and higher lactation. The yield of cows of the Ukrainian Red-and-White Dairy breed of the first lactation varied from 5414 kg (Dialog 2009) to 6689 kg (Larets 6177), testifying to better homogeneity of herds in terms of milk productivity compared to the Ukrainian Black-and-White dairy breed. The highest yield of the third and highest lactation – 7626 kg, had cows-daughters of the bull Roman 660886883 Starbuck line 352790. The variability of milking cows of Ukrainian Red-and-White Dairy breed of the first and highest lactation by 25.0% and 15.2%, respectively, was due to the influence of the father offspring and to a lesser extent – belonging to the line. A very high (6517–8013 kg) realization potential of milking cows of the Ukrainian Red Dairy breed was established, but it also depended on the paternal origin and linear affiliation. The highest yield of the first lactation were shown by the daughters of the bull Belisar 365235897, Dzhorin 114414759 and Tumpi 112367468, who produced 8013 kg, 7323 kg and 7170 kg of milk, respectively. In cows of this breed it was found that yield increased with increasing serial number of lactation, with the third and higher lactation cows produced more than 8000 kg of milk per lactation, and the daughters of bull Dzhorin 114414759 – more than 9000 kg. The influence of the bull on the milk productivity of the first-born cows of the Ukrainian Red Dairy breed (16.7%; P > 0.999) is almost three times higher than this linear affiliation. Significant phenotypic variability of milk productivity of cows of different breeds of half-sisters by the father is established. The advantage of the daughters of the bull Belisar 365235897 of the Ukrainian Red Dairy breed on milking of the first lactation over the representatives of the Ukrainian Red-and-White Dairy breed was 1932 kg (p < 0.001). The difference in milk yield of the first lactation of the half-sisters by the father, the bull Konbeo 579810507 was 1007 kg (p < 0.01), and Roman 660886883 – 717 kg. Thus, a significant phenotypic variability of milk productivity of cows of different breeds of half-sisters by father was established. At the same time, regardless of the breeder, the cows of the Ukrainian Red Dairy breed were characterized by higher milk yield of the first lactation in comparison with the Ukrainian Red-and-White Dairy breed.

scholarly journals Molecular genetic analysis of some North African barley germplasms

2017 ◽  
Vol 109 (2) ◽  
pp. 187
Author(s):  
Reda Gaafar ◽  
Mai Allam ◽  
Rasha Sabry ◽  
Mahmoud Saker
Keyword(s):  
Rapd Markers ◽  
Molecular Genetic ◽  
Molecular Genetic Analysis ◽  
North African ◽  
Rt Pcr ◽  
Breeding Selection ◽  
High Level ◽  
Barley Genotypes ◽  
Selection Of ◽  
Selection Of Resistance

<p>Isozyme and RAPD markers were used to characterize 29 barley accessions, which were collected from North Africa. In addition, resistance gene sequences were employed to develop molecular markers using RT-PCR approach. High level of polymorphism was found with both RAPD and isozyme markers, where RAPD showed that 60 % of amplified bands were polymorphic. Peroxidase showed three polymorphic loci (7 allelic bands). Isozymes cluster analysis successfully separated the barley accessions into three geographically distinct groups. RAPD investigation demonstrated that Egyptian accessions were grouped into two obvious groups. Moreover, the Tunisian accessions showed no distinct clustering, while high dissimilarities were revealed by the Algerian accessions. In the RT-PCR, from six primer pairs selected, primer pair AF092524P1P2 successfully amplified two specific amplicons of approximately (340 &amp; 220 bp) and (360 &amp; 270 bp), respectively in two Egyptian barley genotypes (El-Awamah and Awlad-Ali). One primer pair DN988165P1P2 gave only one specific amplicon in both barley genotypes of 250 and 270 bp, respectively. The markers developed could be used in improving barley crop by assisting in breeding selection of resistance genotypes.</p>

scholarly journals The concentration of insuline-like growth factor in colostrum, milk and plasma of cows

2019 ◽  
Vol 21 (93) ◽  
pp. 121-124
Author(s):  
D. V. Hrudetska ◽  
M. R. Simonov ◽  
O. O. Dashkovskyy
Keyword(s):  
Growth Factor ◽  
Plasma Level ◽  
Clinical Status ◽  
Postnatal Period ◽  
Energy Deficit ◽  
Black And White ◽  
Oncological Diseases ◽  
High Level ◽  
The Given ◽  
Dairy Breed

Recently, a significant amount of data has been reported indicating on the link between consumption of dairy products and development of oncological diseases. This could be explained by the presence in milk of various hormones, particularly insulin-like growth factor (IGF). This hormone is a mediator between somatotropin and tissues. In response to the increase of the blood level of growth hormone, hepatocytes begin actively synthesize the IGF, which accelerates the rate of the metabolism, including those of onco-cells. The majority of studies relate to humane medicine, and data on the dependence of IGF milk levels on breed, period of lactation, diet, physiological, and clinical status of an animal are lacking. Taking this into consideration, the purpose of this study was to analyze the concentration of insulin-like factor in colostrum, milk of cows and blood plasma at various stages of lactation. Study was performed on cows of Ukrainian black-and-white dairy breed in their from second to fifth lactation with milk yield 5100–5700 kg per previous lactation. Concentration of IGF was detected in colostrum, milk and plasma of cows, using enzyme immunoassay. Obtained material gives evidence that the highest IGF level is present in colostrum. After that hormone concentration decreases up to 10–14 day of lactation. High level of IGF in colostrum might be associated with necessity to stimulate metabolism of calves in early postnatal period of ontogenesis. Immediately after calving plasma level of IGF decreases. The highest level was observed on 10–14th days of lactation. Taking into consideration physiological function of the given hormone, there is no univocal explanation of the decrease of its plasma level in cows at the beginning of lactation. This could be associated with energy deficit, physiological condition of animals or with developing of lactation dominant and levels of other hormones. Potential of further research lies in investigation of the dependence of the IGF level in the secretion of the mammary gland on productivity, breed, age and diet of animals.

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