Breeding method for inducing facultative fish of yellow catfish to produce super-male fish and all-female mating lines

Abstract

The invention provides a breeding method for producing supermale and all-female mating lines by inducing yellow catfish facultative fish, including: XY genotype and XX genotype facultative fish induction and type judgment criteria, using XY genotype Facultative fish backcross to produce candidate supermale fish population and supermale fish testcross screening method, using the technology of XX genotype facultative fish backcross to generate all-female mating line. According to the above-mentioned technology, for multiple geographical populations introduced according to the technical requirements, super male and all female mating lines were respectively constructed, and the production combination of all male yellow catfish with hybrid advantage was screened out by diallex hybridization test. In order to prevent population mixing and test cross identification accuracy, the present invention establishes an electronic digital chip labeling management method, the induced facultative fish does not need genetic identification, the screened super-male family has the characteristics of high male rate, and the requirements for equipment are simple. The technology is easy to operate, and is also applicable to the breeding of all males and all females of other male dimorphic fishes.

Description

technical field [0001] The invention belongs to the technical field of sex control of fish genetics and breeding, in particular to a breeding method for inducing facultative fish of yellow catfish to produce super-male fish and all-female fish matching lines, which is also applicable to all-male fish of other male heteromorphic fish Breeding with all-female fish. Background technique [0002] There are differences between male and female in the biological traits of many fish, such as growth rate, mature age, reproductive mode, body shape and color, etc. Humans can obtain specific traits expected by a single sex through sex control. At present, fish sex control methods include artificial selection, hormone induction, gynogenesis, androgenesis, interspecific hybridization, polyploid induction, three-line matching, GMT technology and sex molecular markers. Manual selection is difficult to accurately distinguish between male and female individuals at the juvenile stage, and the...

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Problems solved by technology

[0005] In order to overcome the above problems, the object of the present invention is to solve the super male fish and all-female mating line breeding method of all male yellow catfish large-scale artificial breeding needs by establishing a kind of super male fish and all female mating line breeding method with simple equipment configuration and easy technology operation. The problem of batch female broodstock and male rate can prevent the risk of germplasm degradation caused by simple population structure, low genetic diversity and inbreeding

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