Creation of new silkworm Bombyx mori L. Hybrids with increased unfavorable rearing conditions tolerance by crossing sex-limited for egg color and larval markings breeds

Panomir Tzenov, Krasimira Avramova, Dimitar Grekov, Yolanda Vasileva

Abstract: There is a very close connection between environment and Bombyx mori L. in all stages of
development. The abiotic factors with the strongest influence on the development of the silkworm are:
temperature, humidity, premise ventilation and light. The current study explores the adaptive abilities
towards unfavourable conditions of newly created mulberry silkworm hybrids obtained by crossing
sex-limited for egg and larval markings breeds. Some biological and technological features of the
hybrids tested have been evaluated. Under provocative silkworm rearing regime the newly created
hybrids manifest a relatively high vitality of the larvae which exceeds the one in the control and under
optimal breeding conditions they have a comparatively high productivity.

Keywords: Bombyx mori L.; rearing performance; sex-limited strains; silkworm

Date published: 2022-04-26