Genetic marking of live weight of meat sheep at an early age
https://doi.org/10.26897/0021-342X-2024-6-171-180
Abstract
The study analyzed the genetic diversity of polymorphism in the calpain (CAPN1) and leptin (LEP) genes in ewes and rams of the Kalmyk fat-tailed breed and the influence of different genotypes on their live weight and average daily gain. It was found that the proportion of the C allele in the CAPN1 locus was higher in rams, while the T and C alleles were equally frequent in ewes. The T allele was more common in ewes and rams than in the parent stock. In the LEP locus, animals with the AG genotype were most common. No deviations from the Hardy-Weinberg equilibrium were found for either locus. Ewes and rams of different genotypes for the CAPN1 gene did not differ in live weight at birth, but by the age of weaning, both rams and ewes with the CC genotype outperformed the young animals of other genotypes. No reliable differences were found between the live weight and average daily gain in ewes and rams of different genotypes for the LEP gene, except that the rams of the AA genotype were characterized by a higher live weight at birth than their peers. It was found that stud rams with the AA genotype were significantly inferior in live weight to rams with other genotypes, while ewes with the AA genotype outperformed ewes of other groups in this trait.
About the Authors
M. I. Selionova
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Marina I. Selionova, DSc (Bio), Professor, Head of the Department of Animal Breeding, Genetics and Biotechnology
49 Timiryazevskaya St., Moscow, 127550
Yu. A. Yuldashbaev
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Yusupzhan A. Yuldashbaev, DSc (Ag), Professor, Full Member of the Russian Academy of Sciences, Professor at the Department of Specific Animal Science
49 Timiryazevskaya St., Moscow, 127550
M. Yu. Gladkikh
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Marianna Yu. Gladkikh, CSc (Ag), Associate Professor at the Department of Animal Breeding, Genetics and Biotechnology
49 Timiryazevskaya St., Moscow, 127550
S. O. Chylbak-ool
Russian State Agrarian University – Moscow Timiryazev Agricultural Academy
Russian Federation
Russian Federation
Salbak O. Chylbak-ool, CSc (Bio), Associate Professor at the Department of Animal Breeding, Genetics and Biotechnology
49 Timiryazevskaya St., Moscow, 127550
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Review
For citations:
Selionova M.I., Yuldashbaev Yu.A., Gladkikh M.Yu., Chylbak-ool S.O. Genetic marking of live weight of meat sheep at an early age. IZVESTIYA OF TIMIRYAZEV AGRICULTURAL ACADEMY. 2024;(6):171-180. (In Russ.) https://doi.org/10.26897/0021-342X-2024-6-171-180
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