Polymorphisms of bGH, RORC, and DGAT1 genes in Russian beef cattle breeds

Abstract

We examined the allelic and genotypic polymorphisms of genes of the retinoic acid receptor related orphan receptor C (RORC), diacylglycerol acyltransferase 1 (DGAT1), and growth hormone (bGH) in Russian beef cattle breeds in two populations of Kazakh white headed cattle (of Kazakh and Russian selec tion) and the Kalmyk cattle breed, as well as in the Mongolian hogorogo breed, which is related to Kalmyk breed. The studied genes are associated with parameters of meat quality: marbleness (bGH and RORC) and tenderness (DGAT1). They are also associated with an increase in carcass weight (bGH). We found that Rus sian and Kazakh populations of the Kazakh white headed breed were characterized by a high content of the AA genotype of RORC (0.713 and 0.608, respectively) and of the AA genotype of DGAT1 (0.913 and 0.975), both of which are preferable for meat quality. The total frequencies for the combined genotypes for the bGH and RORC genes, which provide for superior meat quality and carcass weight, in the populations of Kazakh white headed cattle (GG/AA and GC/AA-68.8 and 57% in the Russian and Kazakh populations, respec tively) exceeded the frequencies in the two other studied breeds by two times. Overall, the obtained results point to the high genetic potential of both populations of Kazakh white headed cattle breeds in beef produc tion. Results of this study can be used to improve the selection of meat traits in industrial livestock.

CAST/MspI gene polymorphism and its impact on growth traits of Soviet Merinoand Salsk sheep breeds in the South European part of Russia

“…The genes, allelic variants of which are associated with the phenotypic expression of economically relevant traits of the animals (weight, height, meat yield, etc. ), are considered as the DNA markers (8)(9)(10).…”

Productivity and Qualitative Meat Indicators of Angus Steers of Various GH Genotypes

“…The significance of differences between the indices was determined using the criteria of nonparametric statistics for the linked populations (differences with P>0.95 were considered significant: aP>0.999; bP>0.99; cP>0.95; ns = not significant at P<0.95). Student's t-test was applied for the statistical analysis ( Johnson and Bhattacharyya, 2010). The mean of a set of measurements was calculated according to the formula:…”

“…Selection of animals for further breeding according to genetic markers associated with quantitative and qualitative productivity indicators at an early age allows significant accelerating of the selection and genetic process in the herd, population and breed Radchikov et al, 2018;Sulimova et al, 2016).…”

The impact of diacylglycerol O-acyltransferase 1 gene polymorphism on carcass traits in cattle

“…Carcass traits are alongside fattening performance one of the most important traits in beef industry. It is generally accepted that the beef production is very complex and time-consuming field of the livestock industry (Gorlov et al, 2014;Ardicli et al, 2017). The majority part of traits associated with carcass quality and meat yield is under the control of polygenic inheritance.…”

“…AY065621) encodes a microbial enzyme catalysing the last step of the synthesis of triglycerides (Ardicli et al, 2017). During the metabolism of fatty acid, the DGAT1 participates in the conversation of carbohydrates into fat and their storage in the fat depot (Gorlov et al, 2014). In cattle, the DGAT1 gene is localized in the area of centromere of chromosome BTA14.…”