Breeding method for new line of hybrid Crassostrea hongkongensis and Crassostrea gigas

Abstract

The invention discloses a breeding method for the new line of hybrid Crassostrea hongkongensis and Crassostrea gigas. According to the technical links of one generation preparation of the female Crassostrea hongkongensis and male Crassostrea gigas hybrid seed, environmental effect detection, breeding potential assessment, optimal class group selection self propagation and the like, a new line of hybrid gigas suitable to the local place can be obtained by 3-4-generation breeding. According to the breeding method for the new line of the hybrid Crassostrea hongkongensis and Crassostrea gigas, which is disclosed by the invention, gametogamy sovereignty nuisance between gigas seeds is overcome; a series of problems of slow growth speed, weak viability and exceeding sterility of hybrid F1 can be solved; the selection function on an excellent gene type by environmental stress is quickened; a breeding method suitable for the local new line of Crassostrea hongkongensis and Crassostrea gigas can be created. According to the new line bred with the breeding method disclosed by the invention, the applicable range on the temperature and the salinity by the gigas is widened, and the yield is improved by more than 30% (if being compared with parents). The breeding method for the new line of Crassostrea hongkongensis and Crassostrea gigas has the advantages of strong practicality, easiness in popularization and the like.

Description

Technical field: [0001] The invention belongs to the technical field of shellfish seed breeding in marine agriculture, and in particular relates to a method for cultivating a new strain of fragrant long hybrid oyster. Background technique: [0002] Interspecific hybridization is one of the basic breeding methods of animals and plants. Its characteristics are that it can significantly expand the gene pool of animals and plants, promote interspecific exchanges, introduce beneficial genes of different species, create new variant types, and even synthesize new species ( Lou Yundong, 1999). [0003] The distant hybridization of shellfish originated from oysters. As early as 1882, Bouchon-Brandely carried out the interspecific hybridization between Portuguese oyster (Ostrea angulata) and European oyster (O.edulis). In 1950, Davis studied the interspecific hybridization of Pacific oyster O.gigas×American oyster O.virginica and American oyster×Olympia oyster O.lurida. Subsequently...

AI Technical Summary

Problems solved by technology

In 1993, Gaffney & Allen summarized the interspecific hybridization of Oyster oysters. Although there were many reports on distant hybridization of Oyster oysters, there were few real successes. The reports mainly focused on the early phenotypic traits of the first generation of hybrids. Research, and almost all interspecific crosses have not obtained significant heterosis

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