ANALYSIS OF THE GENOTYPE PARAMETERS FOR SELECTION OF RABBIT DOE OF DIFFERENT STRUCTURAL ELEMENTS HYLA CROSS

Abstract

Modern methods of breeding rabbits are based on the use of genotypic parameters, the assessment of which allows effective work on increasing the productivity of rabbits. The aim of the work was to study the indices of heritability of female rabbit productivity traits, to establish a relationship between them, and to determine the influence of males on the performance of doe productivity. The research was conducted using rabbits of the ancestral forms of the Hyla cross - male GPC (n=47) and female rabbits GPD (n=79), as well as doe of the maternal form - NG (n=223). The heritability of breeding traits of female rabbits was studied, the correlation and regression between them were evaluated, and the influence of males with different weight indices on the productivity of doe of the maternal form. The results of research indicate that doe of the maternal form prevailed over females of the ancestral form in terms of milk yield by 1814 g (р ≤ 0.01), but were inferior to them in terms of multifertility. Evaluating the correlation coefficients between the characteristics of the performance of female rabbits of the ancestral form, a probable (р ≤ 0.05) average inverse relationship (r = -0.561) was found between multiple fertility and high fertility. In female rabbits of maternal form, there was a strong direct relationship between high fecundity and live weight of rabbits at the age of 21 days (r=+0.794) (р ≤ 0.05). It was established that the main reproductive characteristics of female rabbits of the maternal form have low heritability (0,04-0,21). The probable influence of males with different weight indices on doe fertility was revealed (21% (р≤0.001)) and on the milk yield (18% (р≤0.001)) of the maternal form. The obtained research results will have significant practical value when planning breeding work with various structural elements of the Hyla cross.