Method for producing seeds of new Nero-Aurea tilapia

Abstract

The invention discloses a method for producing seeds of new Nero-Aurea tilapia. The method comprises the following steps: (a) carrying out intraspecific hybridization by taking a female of an Egypt strain in Nile tilapia as a female parent and a male of a Gift strain in the Nile tilapia as a male parent to obtain first filial generation F1 of Nile tilapia; and (b) carrying out interspecific hybridization propagation by taking the female in first filial generation F1 of the Nile tilapia as the female parent and the male of American strain of oreochromis aurea as the male parent to obtain hybrid generation, namely the new Nero-Aurea tilapia. With the adoption of the method provided by the invention, a seed producing technique combining intraspecific hybridization with interspecific hybridization is utilized, excellent characters are combined, and the growth speed and the male rate of the tilapia are improved, thereby the cultural output and benefits of the tilapia are improved.

Description

technical field [0001] The invention relates to the field of fish breeding, in particular to a seed production method for neonio tilapia which combines intraspecific hybridization and interspecific hybridization of fish. Background technique [0002] Hybrid breeding is the main way of new fish species, which plays a huge role in the improvement and production of fish species, and is one of the important ways of fish breeding. Because hybridization can increase the variability and heterogeneity of hybrid offspring, combine the excellent traits of the parents, and produce some new traits that the parents do not have, so that the offspring can obtain greater genetic improvement, and there will be available heterosis. Varieties, strains and even individuals of traits are crossed to breed hybrid populations that meet the breeding requirements. There are many reports on the hybrid seed production of tilapia at home and abroad, such as the tilapia tilapia (intergeneric distant hyb...

AI Technical Summary

Problems solved by technology

However, in scientific research and production practice, we found that the male and female parents of Neo tilapia are different, and the growth speed and male rate of Neo tilapia obtained are significantly different, and the quality of the species is comparable to that of foreign countries. There is a large gap in the ratio, which hinders the further development of tilapia aquaculture in my country. The low rate of improved tilapia species cannot meet the needs of fishery production and market development.

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