Seed production method of crassostrea gigas mantle pure breeding strains

Abstract

The invention relates to a seed production method of crassostrea gigas mantle pure breeding strains, which uses a heritable quantitative trait of crassostrea gigas mantle color as a label, selects pure individuals with different mantles from natural groups, and then screens out a mantle pure black strain with rapid growth and high dressing percentage and a mantle pure yellow strain with strong stress resistance by successive generations of directed purification. The method comprises the processes of parent selection, fertilization and hatching, larval cultivation, intermediate cultivation and later stage cultivation. The method features simple method and strong operability. The crassostrea gigas mantle pure strains obtained by continuous selection has the advantages of high goods value, fast growth, strong stress resistance and high dressing percentage and the like, therefore, the method not only can realize industrial applications, but also lay the foundations for the breeding and genetic improvement of crassostrea gigas.

Description

Technical field [0001] The invention relates to a method for producing shellfish seeds, in particular to a method for producing seeds of oyster oyster mantle pure color breeding lines. Background technique [0002] Crassostrea gigas, also known as Pacific oyster, is naturally distributed in Japan, China and South Korea. Due to its fast growth, strong environmental adaptability and delicious meat, it is the world's most widely cultivated marine shellfish with the largest production. In 2006, the world's oyster production reached 4.6 million tons, of which my country's production accounted for 81%, reaching 3.75 million tons (FAO, 2008). At present, long oysters are cultivated in the north and south coasts of my country. The seedlings required for breeding mainly rely on artificial seedlings, and the parents used are all from the breeding groups that have not undergone genetic improvement. In recent years, long oysters have experienced problems such as high mortality, low meat yie...

AI Technical Summary

Problems solved by technology

In recent years, long oysters have experienced problems such as high mortality, low meat yield, and poor meat quality, resulting in low market prices and affecting the development of my country's oyster farming industry.