The nature of inheritance of wool productivity in merino sheep of improved genotypes

Introduction. The purpose of the study was a comparative assessment of the inheritance of the basic parameters of wool productivity when creating new lines in the hundred sheep of the Salian breed. The scientific novelty of the research consists in the analysis of the manifestation of the nature of inheritance of the main signs of productivity in merino sheep when crossing domestic breeds in a new combination.

The methodology. The assessment of inheritance of wool productivity was carried out on sheep and young sheep obtained by combining the genotypes of the Salskaya, Dzhalginsky merino and Russian meat merino breeds.

The results of the research. The authors consider the prospect of creating genetic constructs in Merino sheep breeding in order to improve the genetic structure of populations. The expansion of genetic diversity is achieved through the creation of synthetic lines. The material for this will be animals obtained as a result of the unification of the carriers of inheritance, different domestic breeds of sheep. According to the results of the assessment of the average wool shearing in the mother-daughter subgroups, it was found that the bright descendants from the CA+DM crossing by shearing in pure fiber had an advantage over the control (CA) of 10%. The bright 3 (CA+RMM) groups had the highest yield of pure wool – 58%. However, in terms of cutting clean wool, they were inferior to the group of control animals (CA) by almost 3%. The thinnest hair, both on the side and on the thigh, was in the second group (CA+DM). In relation to the first group (CA), this difference was 2.4%, and in relation to the 3rd group – 6.5%. The longest hair turned out to be in the bright 3 groups, whose fathers had hair less often, rougher and longer than their peers from the first and second groups. The difference between the brightness of groups 3 and 1 was 0.6 cm or almost 5.5%.

Conclusions. It was found that as a result of crossbreeding, crossbred animals showed an intermediate nature of inheritance of the main indicators of wool productivity. The crossbreeds of the Salian breed with the Dzhalgin merinos had higher cuts of finer wool. The crossbreeds of the Salsk breed with the Russian meat merino had lower shearing of wool with a large diameter of the cross-section of the hairs, but had the highest yield of pure wool.

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