Abstract
Molecular genetics methods allow for identifying markers of desirable economically useful traits of farm animals. The aim of this study was to investigate the effect of genetic similarity of parents and offspring on milk production of daughter cows. The study was carried out employing 630 pairs of black-motley cattle. Animals were tested for 11 microsatellite loci. As a result of the studies, it was found that the genetic similarity index of father–mother pairs was lower than the similarity index of mother–daughter and father–daughter pairs. Positive correlations were also observed for genetic similarity of father–mother, father–daughter, and mother–daughter pairs and the milk production of daughter cows. The correlation coefficient between the genetic similarity of pairs of animals and the milk yield over 305 days of lactation was 0.24–0.34 at p ≤ 0.05–0.01. A decrease in protein content by 0.05% and fat by 0.16% in milk of daughters was observed when their genetic similarity with mothers was higher. The correlation coefficient between the genetic similarity of mother–daughter pairs and the fat and protein content in milk was 0.17–0.31 at p ≤ 0.01–0.001.
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This study was carried out as part of the state assignment on the Investigation of Breeding Parameters of Molecular Genetic Characteristics and Their Effect on Main Economically Useful Traits of Black-Motley Cattle in the Ural Region topic.
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Translated by K. Lazarev
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Shatalina, O.S., Tkachenko, I.V., Afonina, D.A. et al. Effect of Genetic Similarity in Microsatellite Loci of Parents and Female Offspring on Milk Productivity. Russ. Agricult. Sci. 46, 305–309 (2020). https://doi.org/10.3103/S1068367420030209
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DOI: https://doi.org/10.3103/S1068367420030209