Utilization of Dark Moth Wing Gene in Silkworm Genetic Breeding

Abstract

The invention discloses a dark moth wing gene utilization method in silkworm genetic breeding. Through a homozygosis method of rapidly introducing a dominant gene, the dominant gene is introduced into one breed of hybridized combination, so that on the basis that the degree of functionization of economic characters is not lowered, and by utilizing the differences of obvious moth wing body color between the dominant gene and another pair of hybridized breed of the hybridized combination, the purposes that pure pairs are distinguished and removed so that the hybrid rate of first generation hybrid cultivar can be improved are achieved. According to the homozygosis method of rapidly introducing the dominant gene, by utilizing the inherent characteristics of a homozygous individual of the dominant gene, individual transgenerational of the dominant gene is selected, the complete homozygous process of the dominant gene can be accelerated, and compared with a traditional breeding method, the number of selecting generations can be substantially reduced. According to the method, the number of generations needed by the gene homozygosis is small, the working procedure is simple, the cost is low, no pollution occurs, the economic characters are good, the practical value is high, by utilizing the preparation characteristics of the dark moth wing gene of the hybridized combination, the hybrid rate of the first generation hybrid cultivar can be substantially improved, and the occurrence that the hybrid rate indicator is not qualified is avoided.

Description

technical field [0001] The invention relates to a silkworm breeding method, in particular to a method for utilizing dark moth wing genes in silkworm genetic breeding. Background technique [0002] According to the regulations of the national silkworm first-generation hybrid inspection standard (NYT 327-1997), the hybridization rate of the first-generation hybrid must not be lower than 95%. As a result, a large number of pure pair matings occurred due to incomplete separation of males and females, and the hybridization rate index was difficult to reach the standard, resulting in the scrapping of whole batches of silkworm eggs. [0003] In the prior art, there are 2 technical methods for avoiding pure pairs in silkworm breeding and production: [0004] 1. Some silkworm egg production units use dyes to dye one of the hybrid varieties of silkworm moths to achieve the purpose of distinguishing pure pairs. Dyestuffs cause silkworm moths to be unable to continue to be used in dee...

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Problems solved by technology

[0006] Aiming at 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 dyeing technology and the low degree of practical application of darkening genetic resources. Dark moth wing gene resources, through a method of quickly introducing homozygous dominant genes into a variety in the hybrid combination, so that it can be used without reducing the practicality of economic traits. The significant difference in wing body color between another pair of hybrids in the hybrid combination achieves the purpose of distinguishing and eliminating pure pairs, thereby increasing the hybridization rate of the first generation of hybrids

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