THE ROLE OF GENOTYPE AND ENVIRONMENT IN DEFENSIVE BEHAVIOR OF THE MINI-PIGS BRED IN THE INSTITUTE OF CYTOLOGY AND GENETICS IN RELATION TO THE HUMANS

Abstract

The article explores genetic and environmental components of phenotypical variation of domestic behavior (associated food reaction and defense behavior in relation to a man) by means of the model of ICG mini-pigs’ major heritability. The authors found out that application of allelomorphic and genotypic diversification on the major gen FWH estimates population variation of 1.5 and 4.1 month aged mini-pigs’ behavior. The paper shows that the main component of genotypic diversification of mini-pigs’ domestic behavior is additive genetic variation (P < 0.01 - 0.001) that exceeds the genetic dominant variation and general environmental variation. The average contribution of additive variation into the genotypic diversification of young mini-pigs’ behavior is 94. 8 %. The phenotypic diversification of mini-pigs’ domestic behavior is explained by the additive genetic variation that exceeds the relative contribution of environmental variation on 3.2 times. The relative additive genetic contribution of FWH alleles doesn’t depend on gender and age of piglets and varies from 71.0 to 75.6. The average coefficient of mini-pigs’ domestic behavior heritage (73.5 %) corresponds to the average index of 2 specialized crossbred line fertile pigs (77.4 %). The authors make conclusion that domestic behavior is a source of adaptive variation for effective crossbreeding of mini-pigs’ laboratory lines that respond to the stress and contacts with humans less.