Breeding method for inducing intersexual pelteobagrus fulvidraco to generate super-male fish synthetic line and all-female synthetic line

Abstract

The invention provides a breeding method for inducing intersexual pelteobagrus fulvidraco to generate a super-male fish synthetic line and an all-female synthetic line. The breeding method comprises the steps of induction of gamete XY type intersexual fish and gamete XX type intersexual fish and criterions of gamete types, a test cross screening method that backcross of the XY type intersexual fish is utilized to generate a candidate super-male fish population and super-male fish, and a technology that backcross of the gamete XX type intersexual fish is utilized to generate the all-female synthetic line. According to the technology, for multiple geographical populations introduced according to the technical requirements, the super-male fish synthetic line and the all-female synthetic lineare constructed respectively, and a diallel crossing test is used for screening an all-female pelteobagrus fulvidraco production combination with hybrid vigors. The breeding method for inducing the intersexual pelteobagrus fulvidraco to generate the super-male fish synthetic line and the all-female synthetic line has the advantages that an electronic digital chip tag labeling management method isestablished in order to prevent population mixing and ensure the accuracy of test cross identification, the induced intersexual fish does not need genetic identification, a screened super-male familyhas high male rate, the requirements for instrument equipment are simple, the technology is easy to operate, and the breeding method is also suitable for breeding of all-male fish and all-female fishof other male gamete alien fish.

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 intersex fish of Peltereglossus to produce supermale and all-female mating lines, which is also applicable to all-male fishes with heteromorphic male gametes fish and all-female breeding. 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 labor intensity...

AI Technical Summary

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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