Breeding method and application of a robust self-cocoon-marked double-restricted silkworm variety

Abstract

The invention belongs to the field of domestic silkworm variety breeding and particularly relates to a breeding method and application of a robust self-cocoon-emerging stripe double sex-limited marking domestic silkworm variety. The breeding method comprises the steps of introducing stripe sex-limited gene into a silkworm variety for production, accordingly improve the comprehensive economic character of the stripe sex-limited gene, introducing the stripe sex-limited gene into short-growth-duration blood relationship through hybridization, and adopting a silkworm moth self-cocoon-emerging method and the like to conduct hybridization and domestication improvement on the stripe sex-limited variety. The male and female silkworms of the bred variety can be separated at a larval phase by utilizing the stripe sex-limited characteristic of the silkworms, silkworm moths can break cocoons and emerge by themselves at a pupal stage, and self-cocoon-emerging rate is higher than 95%. The stripe double sex-limited marking domestic silkworm variety bred by means of the breeding method has the advantages of being short in growth duration, strong and healthy in constitution, excellent in cocoon silk quality, high in self-cocoon-emerging rate and the like.

Description

technical field [0001] The invention belongs to the field of cultivating fine silkworm varieties, and in particular relates to a cultivation method and application of a robust self-cocoon mottled double-limited silkworm variety. Background technique [0002] Silkworm eggs are indispensable and important means of production for sericulture production, and are the basis for the survival and development of the cocoon and silk industry. However, due to factors such as increasing labor costs and a sharp increase in the price of production materials, the benefits of silkworm farms are deteriorating. In addition, my country's rapid economic and social development and accelerated urbanization have resulted in a shortage of rural surplus labor and serious aging phenomena, especially for silkworm farms. In the process of cocoon cutting, cocoon cutting and male-female separation, the working hours are tight and the tasks are heavy, and labor costs are constantly rising (for example, in ...

AI Technical Summary

Problems solved by technology

However, under normal circumstances, whether it is the conventional silkworm species used in current production or the pattern-limited silkworm variety, because the cocoon layer rate is generally higher than 20%, it is difficult for silkworm moths to break out of their cocoons after emergence. The rate of eclosion out of the cocoon is generally adopted after cutting the cocoon, then eclosion, mating and seed production, which will increase the production cost caused by the low efficiency of cocoon cutting and judging the sex at the pupal stage

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