Authors:
A. G. KOSHCHAYEV,
doctor of biological sciences, professor,
S. Y. SHYKLIN,
graduate student,
I. V. SHCHUKINA,
doctor of agricultural sciences, assistant professor, Kuban State Agrarian University of I. T. Trubilin
(13 Kalinina Str., 350004, Krasnodar; tel: +7 861 221-56-37, +7 918 432-45-55, +7 861 221-58-46; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it., iv_shukina@ mail.ru)
Abstract. This article presents the results of studies of the genetic diversity of the Aberdeen-Angus breed of cattle. Research was carried out in the three leading farms of the Krasnodar Territory. The object of the study was the animals most abundant in the province of the breed (more than 31 % of the total number) of cattle meat direction of productivity — Aberdeen-Angus. During the work the following were investigated: the genealogical structure of the population, pedigree certificates and the external profile of animals, the structure of microsatellite loci, the indices of heterozygosity, and the values of Fis. The aim of the research is to study the rock formation process in the Aberdeen-Angus breed, with intensive use of animals in breeding and breeding work. It has been established that in the Krasnodar Territory the population of Aberdeen-Angus cattle used refers to more than 20 legitimate genealogical complexes: 12 groups (63.2 %) belong to American breeding — 3 (15.8 %), Australian and New Zealand — 4 (21.0 %). The average number of offspring per manufacturer was up to 150 goals. Five-year monitoring of the exterior signs of bulls-producers, it is established that all animals have a strong physique. The use of animals in the conditions of the southern foothill zone, with pasture content, affects the strength of the limbs, so in the Australian bulls, the feet with an enlarged thumb meet 7 % more than at the age of 12 months, and in Canada — by 7.2 %. The study of the structure of the most important microsatellite loci: BM1824, BM2113, BM1818, CSRM60, CSSM66, ETH3, ETH10, ETH225, INRA023, ILSTS006, SPS115, TGLA227, TGLA126, TGLA122, TGLA53, made it possible to establish that there are 69 peaks in the population, heterozygosity high from 0.67 to 0.957, the Fis values within the confidence interval (95 %). The studied populations have a stable genealogical structure, there is no close inbreeding, and there are numerous options for modeling further breeding and breeding work.
Keywords: selection, genotype, microsatellite loci, DNA markers, productivity, exterior, genealogy, bulls-producers, confidence interval, heterozygosity.
