GENETIC AND PARATYPIC VARIABILITYИ SELECTION MARKS RABBIT BREEDS OF POLTAV SILVER OF DIFFERENT GENEALOGICAL FORMATIONS

Abstract

The results of a comprehensive analysis of the breeding value of rabbits of
the Poltava silver breed are presented. It was established that the rabbits of the
Nazar line have the highest value of live weight in all death-age groups: by 2.8%
(adult males), 5.0% (adult females), 3% (young males), 8.2% (young females) from
the average value for the herd. This indicates the consolidation of this
genealogical group of animals. It was established that there was a relatively high
positive genetic correlation between breast girth and live weight in all rabbits from
the sample, which was within rG=0.45...0.56, and between waist width and live
weight within rG=0.44 ...0.55. The highest indicators of phenotypic and genetic
correlation between breast girth, waist width and live weight were observed in
young rabbits of the Nazar line, which were, respectively, higher by 24.4% and
13% in relation to the average value (р<0.05).
Unlimited feeding provides average daily gains between technological
periods up to 35.9 g. The maximum average daily gains in live weight of
experimental rabbits according to different types of feeding was noted in the
growing period from 60 to 90 days, which is explained by the high energy of
animal growth.
The highest value tribal value had males Nazar, Baikal and Kasper, whose
BLUP indices were 4.1; 7.3 and 0.9 times higher than the average value. The
reliability indicator of the assessment of the breeding value of rabbits fluctuated
within lim = 63.0-75.9. The variability of the BLUP-estimation reliability
coefficient is of primary importance when selecting rabbits based on a set of traits.
The results of the BLUP assessment of Poltava rabbits give reasons to
recommend this method for wide implementation in order to select breeding males
for hybridization and obtain maximum genetic variability in the offspring, which
will increase the efficiency of the selection process