BIODIVERSITY OF ICG MINI-PIGS AS LABORATORY BIORESOURCES

The paper is devoted to biodiversity of selective ICG mini-pigs, which were bred as a biological resource of laboratory animals used for medical and biological experiments. The authors analyzed the variation of population according to color type, exterior peculiarities and genetic markers. The authors found out that in spite of low number of reproductive cores (30–40 sows and 10–14 boars) and long-term breeding for 20 years, the mini-pigs are characterized by high polymorphism. The authors applied routine culling for animals with low livability and extra sizes. The herd has white, black, black-and-white, agouti, grey and roan marking. The authors observed two variants of the head section of ICG mini-pigs: straight face and moderately dished face; 3 types of body are meat body, pasture body and combined one. According to genetic markers and blood groups, these pigs are characterized by high diversity as the herd genofond lacks 3 alleles that reduce general adaptation. The authors observed the complex of biodiversity features and found out that it outlined the mechanisms supporting polymorphism at low efficient number of population. This polymorphism is not selectively neutral as the gene drift in low number populations can eliminate the polymorphism rather quickly. The authors conclude that ICG mini-pigs are highly polymorphic and have significant phenotypical variation and genetical one. This explains its significant bioresource potential as a sow farm for medical and biological research. 

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