Breeding method for scallop hybridization breeding

Abstract

The invention discloses a breeding method for scallop hybridization breeding. The breeding method is characterized by comprising the steps that firstly, gonad development synchronous breeding is carried out on selected chlamys farreri and Argopecten irradians; then, fully-developed female chlamys farreri in the chlamys farreri and the fully-developed Argopecten irradians are selected, after the female chlamys farreri finishes spawning, the hermaphroditic Argopectehs irradians is set for spermiation, and fertilization is carried out on sperms and eggs to form scallop hybridization fertilized eggs; incubation is carried out on the hybridization fertilized eggs, then larva selection is carried out, and larvas are bred in a larva breeding pond; finally the bred larvas are bred to scallop hybridization fry capable of being bred through settlement and metamorphosis. The hybridization scallop fry are bred from the female chlamys farreri and the Argopectehs irradias in a hybridization mode, and have the prominent advantages that in the breeding process, growing speed is high, resistance to diseases is high, the gonad is poor in fertility, the adductor muscle is large, the growing speed can be improved by more than 30 percent, the yield of primary products of the adductor muscle is improved by more than 40 percent, the obvious heterosis is achieved, and the sustainable development of scallop culture in China can be promoted.

Description

technical field [0001] The invention belongs to the breeding technology of shellfish aquaculture, in particular to a method for cultivating hybrid seedlings of scallops. Background technique [0002] There are three main types of scallop cultured in my country, namely the dioecious indigenous species Chlamys farreri, the high-temperature-resistant hermaphroditic bay scallop imported from the United States, and the low-temperature-resistant dioecious Ezo scallop imported from Japan. However, since the mass death of Chlamys farreri broke out in the summer of 1997, the species structure of scallop culture in my country has undergone major changes. Because the bay scallop has the characteristics of fast growth, short breeding cycle, and wide temperature range, it can bring greater economic benefits. Therefore, the bay scallop is deeply loved by the majority of farmers and occupies a leading position in the scallop farming industry in my country. . Since the bay scallop was intr...

AI Technical Summary

Problems solved by technology

Therefore, in recent years, in the cultivation process of bay scallops, there have been problems such as high breeding mortality, slow growth of seedlings, poor uniformity, small individual proportions, thin and small scallop individuals, and low adductor muscle growth rate.

These outstanding problems have caused a significant reduction in the production of scallops, and a large number of farmers have lost money, seriously dampening the enthusiasm of farmers, and also inhibiting the development of my country's scallop farming industry.

At present, although there are many reports on scallop hybrid breeding experiments, most of them are hybrids between populations of the same species of Chlamys farreri, bay scallops and Ezo scallops in different geographical environments, and hybrids of dioecious scallops and Ezo scallops. It is difficult to produce heterogeneous Chlamys scallops and hermaphroditic bay scallops in crossbreeding seedlings, but it is strongly required to genetically improve bay scallops and Chlamys scallops in scallop production to breed fast-growing, strong disease-resistant, and large adductor muscles. Scallop Varieties