Method for producing fish seeds of genetic male red tilapia hybrids

Abstract

The invention discloses a method for producing genetically male red tilapia hybrid fingerlings, which belongs to the technical field of breeding tilapia. A main point of a technical proposal of the method is to adopt red female tilapia and YY-type supermale tilapia nilotica for hybridizing propagation, wherein the red female tilapia is bred via more than 10 years of purification and rejuvenation after the red female tilapia was introduced from Taiwan in 1995; and the YY-type supermale tilapia nilotica is bred by use of a YY / GMT technique. The male red tilapia hybrid fingerlings produced by the method have the advantages of high red rate and male rate. The method can provide a brand new breeding technique for culturing red tilapia.

Description

technical field [0001] The present invention relates to a kind of breeding technology of XX♀-XY♂ type tilapia, more specifically, it relates to a seed production method of hereditary male red tilapia hybrid fish. 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. [0003] Among the farmed tilapia species, there is a red tilapia commonly known as rainbow bream, which was first discovered in Taiwan. It was actually separated from the hybrid offspring of red Mozambique tilapia and Nile tilapia. Because it has the adv...

AI Technical Summary

Problems solved by technology

At present, in the production of red tilapia fry in my country, most of the red tilapia fry are self-bred, and the male fish rate is usually about 50%, and their offspring contain 5-25% black fry. In the process, black seedlings are sorted out, which increases the cost of seed breeding and labor. Therefore, how to grasp the genetic rules of body color, use heterosis and sex control technology, and develop fast-growing all-male red tilapia hybrid fish for production , has become one of the important topics of scientific and technological research in the aquaculture industry

Images