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

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.