Рroductive longevity of different selection of Holstein breed dairy cattle

The goal is to establish the number of breeding animals of the Ukrainian Black-and-White dairy breed and their affiliation to genealogical formations. For this purpose, the methods of comparison and analysis were used. The research was conducted based on the materials of a comprehensive assessment of livestock of 113 breeding herds breeding the Ukrainian Black-and-White dairy breed in 19 regions of Ukraine. The results. The herd for analysis includes 77,866 females of different age groups, which come from 1,109 breeding bulls. Holsteinized lines and related groups account for 19 genealogical formations with 99.6% of the herd. Breeding bulls of the Elevation 1491007, Chief 1427381 and Starbak 352790 lines are used most (82% of the total herd). Regarding the placement of lineages and related groups in the breeding herds of the regions, it is necessary to single out Kyivska for its widely branched structure (21 formations) and Mykolaivska for its narrowness (2 formations). Conclusions. According to the breed of the father, it was established that the available mother stock belongs to 10 breeds, of which 97% are related (Ukrainian Black-and-White dairy, Holstein and Black-and-White).

unclassified

Genelogical Structure of the Active Part of the Population of the Ukrainian Black-and-White Dairy Cattle

Pochukalin

2023

Durability and Efficiency of Lifetime Use of Red-and-White Dairy Cattle

Polupan

Melnik

Biryukova

et al. 2020

The study was conducted on 325 cows of Ukrainian Red-and-White Dairy and Holstein breeds of the herd of the farm “Khristinovske”. These cows were descended from 28 bulls of 12 lines and related groups. A sufficiently high level of indicators of the duration and effectiveness of lifetime use of cows was established. The average life expectancy of the cows under control was 2750, economic use was 1711, and lactation was 1459 days. An average of 26221 kg of milk, 1097 kg of milk fat and 889 kg of protein were obtained from cows in lifetime (3.63 lactations). On average, 8.7 kg was milked per day of life from cows, on day of economic use – 14.6 kg, on day of lactation –17.2 kg. Received 657, 1030 and 122 g of milk fat and protein, respectively. On average, the coefficient of economic use rate was 58.5%, the lactation rate was 85.6%, and productive use was 49.9%. For most of the studied features of the duration and effectiveness of lifetime use, multidirectional and low interspecific differentiation were established. Holstein cows had the same cows of Ukrainian Red-and-White Dairy breeds as expectancy of life, economic use, and lactation. Cows of the Holstein breed were dominated by cows of Ukrainian Red-and-White Dairy for milk fat and protein yield for one day of life, economic use, lactation and lactation rate. In animals of Ukrainian Red-and-White Dairy breed with increasing conditional bloodiness by Holstein, duration and effectiveness of lifetime use varied curvilinearly. For the most part, the cows group with 87.5% conditional bloodiness by Holstein had the advantage. A certain level of intergroup differentiation is established by the genetic factors of cows' lineage or related group and father parentage. For the most signes of duration and effectiveness of lifetime use are characterized by the better indicators animals of the P. F. A. Chief 1427381 related group and the genealogical line of R. Citation 267150, and by the worse indicators – P. Astronaut 1458744 line. In some cases, the intergroup difference reaches a significant level (up to P < 0.05). Of the half-sisters by parent groups, the daughters of Tumpi 112367468, Vize 660013269, and Roman 660886883 had the highest prevalence and effectiveness of lifetime use, and the worst were the descendants of Y. J. Gladiator 5840283 and Voron 3206. A dispersion analysis confirmed the genetic predisposition of the phenotypic variability of the studied traits of the duration and effectiveness of economic use of cows. On average, by all counted signs, linear membership determines 6.0% of the total phenotypic variability, and parentage from father – 12.1%. Therefore, when selecting the sires, their linear identity should be taken into account with the unconditional priority of the breeding value of the bulls according to the complex breeding index.

The Influence of Genotypic Factors on Longevity and Lifetime Production of Dairy Cows

Polupan

Stavetska

Siriak

2021

The influence of genotypic factors (breed, Holstein share heredity, line or related group, sire) on the longevity and lifetime production of dairy cows has been investigated. The study was carried out in a retrospective statistical experiment on the commercial dairy farm “Terezyne”, which located in Kyiv region. The formed matrix of observations in the sta format generally contained information about 5703 cows for 458 variables. Holstein cows were characterized by higher longevity (1489 ± 27.8 days) and higher lifetime milk production (21940 ± 500.9 kg), the lowest longevity and lifetime milk production had cows of Ukrainian Red-and-White dairy breed. Holstein cows compared to animals of Ukrainian Red-and-White dairy breed had in average more lactations (+0.57 ± 0.187) and higher number of total calves (+0.59 ± 0.244). They had an advantage in lifespan by 218 ± 80.1 days, productive lifespan – by 326 ± 82.0 days, total lactation length – by 282 ± 62.2 days. During the lifetime, they produced 4119 ± 1398.4 kg more milk and 549.3 ± 99.62 kg more milk fat and milk protein. Lifetime daily milk yield of Holstein cows was on average 2.6 ± 0.37 kg higher, lifetime daily milk fat and milk protein – 208 ± 26.7 g more compared to animals of the Ukrainian Red-and-White dairy breed. Cows of Ukrainian Black-and-White dairy breed in most traits were intermediate between Holstein and Ukrainian Red-and-White dairy breed. While increasing Holstein share heredity the longevity and lifetime production of cows tended for curvilinear growing. Lifetime of Holstein cows (100%) in the herd was 0.16 ± 0.405 lactations and 325 ± 170.7 days (P < 0.1) longer compared to animals with Holstein share heredity less than 75%. Their lifetime milk production was 8969 ± 2351.6 kg (P < 0.001) higher, lifetime milk fat and milk protein production by 709.9 ± 164.73 kg (P < 0.001) higher, lifetime daily yield by 3.0 ± 0.62 kg (P < 0.001) and 250 ± 43.5 g (P < 0.001), respectively, higher. The cows of Starbuck 352790, Valiant 1650414 and Elevation 1491007 lines and daughter of V. Astronomer 2160438 and H. R. Artist 6284191 sires showed the best longevity and lifetime production. The advantage of cows of the related group of Starbuck 352790 in comparison to animals of other lines in total number of lactations was 0.28–1.29, number of total calves – 0.16–1.20, lifespan – 90–508 days, productive lifespan – 116–603 days, total lactation length – 98–500 days, lifetime milk production – 1402–12161 kg, lifetime milk fat and milk protein production – 115–892 kg. Daughters of bull V. Astronomer 2160438 characterized by 0.96–2.72 more total number of lactations than daughters of other bulls; they had 0.80–2.33 higher average number of total calves. In terms of lifespan, productive lifespan and total lactation length, daughters of this bull were predominated the daughters of other bulls by 392–1037, 297–1143 and 278–971 days, respectively. One-way analysis of variance showed that the greatest influence on longevity and lifetime production of dairy cows had a paternal inheritance, the lowest – breed, it means there is a tendency of increasing the influence of genotypic factors on the researched traits while reducing the level of selection group in the system hierarchy. The strength of breed influence (higher level of intraspecific selection system hierarchy) on the traits of longevity and lifetime production of cows ranged from 1.1 to 12.5%, Holstein share heredity – 3.9 to 19.5%, line or related group – 4.0–19.8% and paternal inheritance – 25.0–47.6%. Greater degree of influence of paternal inheritance is explained both by the lowest (basic) level of intrabreed system hierarchy (the closest level of intragroup kinship) and (partially) by a much higher number of gradations of the organized factor.