Open AccessDifferentiation of lines of Sychevka cattle using marker genes
Author(s) -
Dmitry Nikolaevich Koltsov,
Михаил Елисеевич Гонтов,
Валентина Ивановна Дмитриева
Publication year - 2020
Publication title -
agrarnyj naučnyj žurnal
Language(s) - English
Resource type - Journals
eISSN - 2587-9944
pISSN - 2313-8432
DOI - 10.28983/asj.y2020i10pp87-93
Subject(s) - breed , genetic similarity , biology , allele , locus (genetics) , genetics , genetic marker , gene , genetic distance , genetic variation , polymorphism (computer science) , molecular marker , genetic diversity , population , demography , sociology
The results of genetic differentiation of 10 main genealogical groups of sires of the breed of Sychevka cattle of the Smolensk region, using as genetic markers the genes of the B-locus of erythrocyte antigens of blood groups (n = 2949). At the present stage of breed improvement, 56 marker genes of the EAB locus were found in the studied animals, of which 16 are common to all lines and related groups. The most common are: b, G2Y2E'1Q', I1Y2E'3G'G'', I1Y2I', O1I'Q', O2A'2J'2K'O', Q', Y1A'1. Lines and related groups were differentiated by the level of marker gene concentration, degree of homozygosity, and genetic similarity. The coefficient of genetic similarity (r) between different lines ranged from 0.58 to 0.85. The high similarity between animals of individual lines and the wide distribution of identical inherited material marked with the G2Y2E'1Q' allele indicate that there are no genetic differences between them. The lines that originate from sires of Sychevska and Holstein origin do not have significant genetic differences between them (r = 0.9). It is proposed to direct breeding work using genetic markers to increase the genetic differentiation of existing and breeding new lines.