In the concern to the question about principles of line breeding in Russian dairy cattle sector

Kharitonov, S S; Melnikova, E.I.; Osadchaya, О.Yu.; Yanchukov, I. N.; Ermilov, A. Yu.; Sermyagin, A.A.

doi:10.31043/2410-2733-2018-2-13-19

Cited by 2 publications

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“…Linear breeding is the basis for the reproduction of genetic material in horse breeding, pig breeding and poultry farming (Barmintsev, 1972;Ernst, Zinovieva, 2008;Kharitonov et al, 2018). As an alternative to this method, cattle breeders also practice intensive use of the most valuable bulls, without dividing the breed into groups of animals by origin (Kharitonov et al, 2018). Analysis of boars' genotypes using a panel of DNA microsatellites showed that linear differentiation (F st = 0-0.34) is available in all pig breeds studied (Ernst, Zinovieva, 2008).…”

Section: Discussionmentioning

confidence: 99%

Assessment of line differentiation in the Thoroughbred horse breed using DNA microsatellite loci

et al. 2019

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The Thoroughbred (TB) horse is the best racehorse breed used in the racing industry. This breed has had a closed studbook for about 300 years. In Russia TB horses have been bred since the second half of the XVIII century. The modern Russian Stud Book register of TB horses is partially presented by stallions and broodmares imported from different countries. The genealogical structure of the breed is represented by 17 lines, among which the Northern Dancer line dominates (30.9 %). The study of features of different lines of TB was carried out on 17 loci of DNA microsatellites (VHL20, HTG4, AHT4, HMS7, HTG6, AHT5, HMS6, ASB23, ASB2, HTG10, HTG7, HMS3, HMS2, ASB17, LEX3, HMS1 and CA425) to assess genetic differentiation of the genealogical structure. The results of the DNA typing of 8091 Thoroughbred horses across microsatellite loci show that the gene pool of the domestic population is represented by 100 alleles typical of the breed. A comparative analysis of the genotypes of horses representing different lines indicates that they differ in the number of alleles (85–99), allele frequencies, the level of polymorphism Ae (2.93–3.48) and the degree of the observed heterozygosity Ho (0.653–0.739). The genetic distances between the lines varied in a wide range from 0.014 (Nasrullah – Northern Dancer) to 0.125 (Massine – Teddy). The correspondence to HWE was maintained in most lines, which is confirmed by the negative values of Fis. Cluster analysis demonstrated the correspondence of the obtained dendrogram of Nei’s genetic distances to its genealogical scheme of lines. Genetic differentiation of lines by index Fst varied in a range 0.005–0.073 at the mean value Fst = 0.024. The data indicate genetic differentiation of lines of TB at the STR markers and confirm the effectiveness of the system of linear breeding for the maintenance of interbreed biodiversity.

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Section: Discussionmentioning

confidence: 99%

Assessment of line differentiation in the Thoroughbred horse breed using DNA microsatellite loci

et al. 2019

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New breed of dairy cattle Sibiryachka

Yarantseva

Shishkina

Gerasimchuk

2020

Sib. vestn. s-h. nauki

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Based on the use of the best domestic and world gene pool of the Holstein breed, a domestic highly productive breed of cattle with a genetic potential of more than 10 000 kg of milk per lactation adapted to the climatic conditions of Siberia was created. When breeding it, different reproductive crosses were used. As a result, a competitive livestock breed with a population of 26 770 heads was obtained. The productivity of 10 129 cows at the time of breed testing averaged 7,461 kg of milk with a fat content of 3.78% and a protein content of 3.16%. In terms of milk yield and protein content in milk, they surpass Black-and-White cows by 1,460 kg and 0.05%, respectively. However, the animals of the original breed have a higher fat content of milk, by 0.14%. The live weight of cows of Sibiryachka breed is 36 kg (6%) more than that of Black-and-White cows. Young animals of the new breed are intensively growing and developing. At all ages, their live weight is higher than Black-and-White peers. The average daily increase from birth to one year for heifers of the new breed was 770 g, for Black-and-White peers – 700 g. For a growing period of up to 18 months, daily growth averaged 706 and 673 g, respectively. The live weight of heifers at 18 months is 424 kg, Black-and-White – 405 kg, which allows insemination of heifers of Sibiryachka breed 24 days earlier. The average yield of calves over 3 years in the new breed was 82.7%, in the original one it was 3.7% less. The period of use of the cows of the created breed is 3.47 calving, which is 8% more compared to the Black-and-White breed.

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In the concern to the question about principles of line breeding in Russian dairy cattle sector

Cited by 2 publications

References 0 publications

Assessment of line differentiation in the Thoroughbred horse breed using DNA microsatellite loci

Assessment of line differentiation in the Thoroughbred horse breed using DNA microsatellite loci

New breed of dairy cattle Sibiryachka

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