Selection of Silkworm Breeds without Pigmentation of the Egg Serosa Shell I. Biological Characters

Panomir Tzenov, Jolanda Vasileva

Abstract: At the Scientific Center on Sericulture, Vratsa a study on selection of silkworm breeds without any pigmentation of the egg serosa shell, which may be further used for highly productive sex-limited for egg color silkworm breeds creation has been conducted during the period 2011–2018. As a result of the breeding work conducted two highly productive breeds without any pigmentation of the egg serosa shell, but manifesting high biological characters values – Milena 1 of the Japanese type and Milena 2 of the Chinese type were created. The two newly created silkworm breeds displayed a productivity, not lower than the ordinary highly productive silkworm breeds having colored egg serosa.

Keywords: Bombyx mori L.; breeding; color; egg; serosa; silkworm

Date published: 2019-06-26