Method for applying silkworm moth dark flowery wing gene to domestic silkworm genetic breeding

Abstract

The invention discloses a method for applying a silkworm moth dark flowery wing gene to domestic silkworm genetic breeding and aims to solve the technical problems of pollution caused by artificial chemical staining technology and low degree of practicality of darkened gene resources. According to the method, the dark flowery wing gene found in practical variety resources is introduced to one variety of a new hybridized combination to distinguish and reject a pure pair by using the silkworm body color quite different from that of another pair of hybrid varieties without reducing the degree of practicality of economic character, so that the aim of improving the hybridization rate of the hybridized varieties is achieved. The method for applying the silkworm moth dark flowery wing gene to the domestic silkworm genetic breeding provided by the invention is simple in procedure, low in cost, free from pollution, good in economic character and high in practical value; in addition, the hybridization rate of the hybridized varieties can be greatly improved by the composition characteristics of the dark flowery wing genes in the new hybridized combination, that is, one is a dark flowery wing, and the other is an ordinary white wing. Therefore, the phenomenon that the whole batch of silkworm eggs is rejected due to the unqualified hybridization rate index is avoided.

Description

technical field [0001] The invention relates to a silkworm breeding method, in particular to a method for utilizing the silkworm moth dark flower wing gene in the silkworm genetic breeding. Background technique [0002] According to the regulations of the first generation of silkworm hybrids (NY 326-1997) (S) of the Ministry of Agriculture of the People's Republic of China, the hybridization rate of the first generation of hybrids should not be lower than 95%. Inadequate measures directly lead to a large number of pure pair mating due to incomplete separation of male and female, and the hybridization rate index is difficult to reach the standard, resulting in the scrapping of the entire batch of silkworm eggs. In the prior art, there are two technical methods to avoid pure pair occurrence in silkworm breeding and production : [0003] 1. Use chemical dyes to dye one species of silkworm moths in cross-crossing species to achieve the purpose of distinguishing pure pairs. Howe...

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Problems solved by technology

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a method to solve the technical problems of pollution caused by artificial chemical dyeing technology and the low degree of practical application of darkening genetic resources. The discovered dark flower wing gene is introduced into a variety in the hybrid combination, so that it can make use of the significant difference in moth body color between it and another common white silk moth variety in the hybrid combination without reducing the practical degree of economic traits , to achieve the purpose of distinguishing and eliminating pure pairs so as to improve the hybridization rate of the first-generation hybrids