New ostrea rivularis species breeding method

Abstract

The invention provides a new ostrea rivularis species breeding method. Firstly, ostrea rivularis and crassostrea gigas parents are selected, and oyster parent ripening promotion breeding is conducted; secondly, ostrea rivularis and crassostrea gigas are manually dissected, female ostrea rivularis and male crassostrea gigas are selected in a microscopic examination mode, and eggs of ostrea rivularis and sperms of crassostrea gigas are taken out for fertilization to form hybrid fertilized ovums of ostrea rivularis; thirdly, after incubation of the hybrid fertilized ovums, larvae are selected and bred in a larva breeding pond; finally, settlement and metamorphosis are conducted on the bred larvae, and a first generation of hybrid fry of ostrea rivularis for breeding is bred, and through artificial breeding, new ostrea rivularis species which is high in disease resistance and growing speed and good in meat quality is screened out to be bred.

Description

technical field [0001] The invention belongs to a breeding method in shellfish cultivation, in particular to a method for cultivating a new hybrid variety of near river oysters. Background technique [0002] Near River oyster (Crassostrea arivularis), named after the estuary where freshwater enters the sea, grows most prosperously, is the main object of shellfish farming in my country. It is rich in nutrition and delicious in taste, and is deeply loved by consumers. It is the main economic shellfish in Guangdong, Guangxi and other places in my country. In recent years, with the continuous expansion of the breeding scale, problems such as difficulty in raising seedlings, slow growth, small individuals, irregular shapes, high mortality, low meat yield, and rising chances of "water oysters" have frequently appeared. During the seedling raising process, The selection of larvae leads to a decrease in the proportion of heterozygotes, causing further inbreeding depression, which se...

AI Technical Summary

Problems solved by technology

[0003] In view of the problems that traditionally cultured Oyster oysters face thin soft body, high mortality, decreased meat quality and flavor, and narrow salt and temperature tolerance, they have not been effectively solved. In the production of Oyster oysters, there is a strong demand for genetic improvement of oyster varieties , the best technical means to overcome the above problems is to breed fine varieties of oysters near the river