Abstract—Meat productivity and meat quality are determined by both paratypical and genetic factors. In this regard, investigating the genetic material for the presence of desirable allele combinations of genes associated with growth and development traits, as well as meat qualities of animals, has scientific and practical significance. The aim of this study was to determine the relationship between growth hormone gene polymorphism and beef cattle carcass quality. A scientific-economic experiment was carried out in the period from 2014 to 2017. Fattening bull-calves of the Hereford (115 animals) and Limousin (114 animals) breeds were genotyped using a polymerase chain reaction followed by subsequent analysis of restriction fragment length polymorphism (SNP GH-L127V). It was revealed that the studied bull-calves have a similar distribution of genotypes; the homozygous genotype GH^LL (47.83 and 52.63%) and allele GH^L (0.69 and 0.71%) were the most common. It was found that, compared to GH^VV bull-calves, GH^LL bull-calves had statistically significantly higher indicators of preslaughter live weight, carcass meat weight, slaughter weight, and loin-eye area; in Hereford cattle, slaughter yield was also higher. The results of examining the morphological composition of half-carcasses proved the high impact of SNP GH-L127V on the chilled carcass weight and the meat content. These figures were statistically significantly higher for half-carcasses of GH^LL and GH^LV bull-calves compared to GH^VV animals. Analysis of the weight and yield of natural anatomical parts of half-carcasses obtained from Hereford and Limousin bull-calves with different genotypes did not reveal a significant difference between the indicators. However, for both breeds, animals with genotype GH^LL had higher chilled half-carcass weight and weight of their natural anatomical parts than animals with genotype GH^VV. Thus, SNP GH-L127V genotyping can be used as an additional criterion in breeding and selection of animals to improve meat qualities of cattle.

中文翻译：

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生长激素基因多态性与肉牛Car体品质的关系

摘要—肉的生产力和肉质是由副型和遗传因素决定的。在这方面，调查遗传物质中与生长和发育性状以及动物的肉质相关的基因的理想等位基因组合的存在具有科学和实践意义。这项研究的目的是确定生长激素基因多态性与肉牛car体品质之间的关系。在2014年至2017年期间进行了一项科学经济实验。使用聚合酶链反应对赫里福德（115只动物）和利木赞（114只动物）的育肥牛犊进行基因分型，随后进行限制性片段长度多态性分析（SNP GH-L127V）。结果表明，研究的公牛犊的基因型分布相似。最常见的是纯合子基因型GH ^LL（47.83和52.63％）和等位基因GH ^L（0.69和0.71％）。研究发现，与GH ^VV公牛犊相比，GH ^LL公牛犊的屠宰前活体重，car体肉重量，屠宰体重和腰肉面积指标具有统计学上的显着提高。在赫里福德牛，屠宰量也更高。检查半尸的形态组成的结果证明了SNP GH-L127V的巨大影响冷藏car体的重量和肉含量。与GH ^VV动物相比，GH ^LL和GH ^LV公牛犊的半尸这些统计数字显着更高。从赫里福德和利穆赞公牛犊获得的不同基因型的半尸的自然解剖部位的重量和产量的分析没有发现指标之间的显着差异。但是，对于这两个品种，基因型GH ^LL的动物的冰鲜半weight体重和自然解剖部位的重量都比基因型GH ^VV的动物高。因此，SNP GH-L127V 基因分型可以用作动物育种和选择的附加标准，以提高牛的肉质。