Navrotska V. Manifestation of quantitative traits in intrastrain crosses depending on parent generation keeping conditions in Drosophila melanogaster Meig. and Bombyx mori L.

The object of study: effect of organisms viability increase arising at keeping of parent individuals in different conditions and its mechanisms. The aim of study: tо study drosophila and silkworm quantitative traits manifestation at intrastrain crossing depending on keeping conditions of parents, to check hypothesis about existence of viability increase effect at crossing of individuals exposed to different impacts, to elucidate this effect nature. Methods of research: estimating of drosophila and silkworm quantitative traits, estimation of mutations and recombination rate, determination of asynapsis level of homologous polytenic drosophila chromosomes, mathematical analysis of results. Theoretical and practical results, newness: the possibility to increase viability of drosophila in the offspring of intrastrain crosses under different light impacts on parents has been established. Increase of silkworm viability in intrastrain cross of individuals one of which was exposed to the influence of microwaves, laser radiation, light has been shown. Genetic consequences of different wavelength light influence (rate of mutations, recombination rate) have been estimated. The method of increase of offspring viability at intrastrain crossing of individuals keeping in different conditions is recommended for inbred depression manifestations decrease and reservation of genetic advantages of inbred strains. The sphere of application: fundamental and applications genetics, selection.