An analysis of main productive characters variability in genetically sex-limited silkworm (Bombyx mori L.) lines and F1 forms

Main silkworm quantitative selection characters variability in genetically sex-limited lines and F, hybrid forms were analyzed. It was determined that pupation ratio, filament thickness and silk ratio characters had comparatively low values of coefficient of variability in two groups (pure lines and F, hybrids), 1.91-2.03 %, 2.63-3.98 % and 3.62- 3.77 %, respectively and filament length and yield of cocoons characters had the highest ones - 9.08-10.47 % and 6.98-7.78 %, respectively. The comparatively low coefficient values and range of variability of all tested quantitative selection characters reveal appropriate lines equalization by phenotype and perspectiveness for creation of new high-productive F, hybrids.