Effect of the PGR Genotype on Economically Valuable Traits in Animals of the Holstein Breed

Machulskaya, E. V.; Kovalyuk, N. V.; Satsuk, V. F.; Shakhnazarova, Yu. Yu.

doi:10.3103/s1068367418060095

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“…The leptin gene and its polymorphic variants of alleles and genotypes can be considered as one of the potential markers of milk and meat production [4]. Leptin is interesting for breeding because it largely determines the milk production of cattle, the content of components in milk (protein and fat), and, just as important, it is associated with the productive longevity of livestock animals [5].…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters of milk productivity for three lactations of Holstein cattle with different genotypes of LEP gene

et al. 2020

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The research presents the findings of DNA testing of allelic polymorphism by the AC-PCR method of the LEP gene. The research was conducted among 172 Holstein cows at Integrated Agricultural Production Centre “Stud farm named after Lenin” in Atninsky district of the Republic of Tatarstan in 2017–2018. All genotypes of the LEP gene were identified through the research. Associations of the leptin gene polymorphism with dynamics of milk production during three lactations of Holstein cows were established. The best indicators for all three lactations were found in a group of animals with the TT genotype of the LEP gene. These individuals are characterized by increased milk yield, a high yield index, and tend to increase the average daily milk yield during three lactations. These individuals are characterized by increased milk yield, a high milk yield index, and tend to increase the average daily milk yield during three lactations.

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Section: Introductionmentioning

confidence: 99%