Abstract
This article comparatively analyzes the viability as well as the fertility of silkworms of local breeds and promising breeding systems during the egg and larval periods. Based on the results of the study, average indicators of eggs hatchability, viability and the morbidity degree of larvae of new breeding systems were identified. At the same time, according to the results obtained, new promising systems in the combination Parvoz 1 x foreign and Parvoz 2 x foreign showed an average degree in terms of fertility characteristics. Uzbek-Chinese breeds are important in the rearing of high-quality cocoon raw materials for sericulture in Uzbekistan in the future, and therefore it is advisable further development of scientific research in this direction and bring it to a new level.
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