Method for producing seeds of ultra-male Niao tilapia

Abstract

The invention discloses a method for producing seeds of supermale Nero-Aurea tilapia, which belongs to the technical field of breeding tilapia. A technical proposal of the method has technical key point of mating WZ female-ZZ male type physiological female oreochromis aurea (ZZ delta female) with XX female-XY male type Nero supermale tilapia (YY male) so as to produce Nero-Austrian genetic supermale tilapia (YZ male). The super tilapia bred by the method has great significance for healthily breeding, improving male rate (100 percent) and promoting tilapia culture technology.

Description

technical field [0001] The present invention relates to a kind of tilapia breeding technology, more specifically, it relates to the method of using the feminization technology of ZZ zygote of WZ♀-ZZ♂ type Aurea tilapia to carry out supermale tilapia seed production . Background technique [0002] Tilapia is bred in many countries in the world due to its delicious meat, wide feeding habits, fast reproduction, strong adaptability and disease resistance; after the introduction of tilapia species in the 1960s in mainland my country, it has grown rapidly in the 20s. In the late 1980s, the cultivation of tilapia was greatly developed. At present, the overall annual output of the whole country has exceeded 1.2 million tons, and it has become one of the main freshwater economic fishes. Among them, the oni fish in tilapia is produced by the hybridization of female Nile tilapia (XX) and male Aurelia tilapia (ZZ), and has been used in production for more than 40 years because of its ob...

AI Technical Summary

Problems solved by technology

However, the male rate of this hybrid mass production is generally 80% to 95%, which is far from meeting the needs of the aquaculture industry and affects the output and quality of commercial fish; for this reason, many seed production units use androgen to treat fry to induce so-called all-male Male fish, which will seriously affect the health of consumers and the ecological environment

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