Breeding method based on three-way hybridization of argopecten purpuratus, argopecten irradians and Argopecten irradians concentricus

Abstract

The invention relates to the technical field of cross breeding of marine economic shellfish, in particular to a breeding method based on three-way cross of argopecten purpuratus, argopecten irradians and Argopecten irradians concentricus. The method comprises the following steps: firstly, carrying out intersubspecific hybridization on argopecten irradians and argopecten irradians concentricus to obtain first filial generation of hybridized scallops of which the fertility is not influenced; performing interspecific hybridization on the obtained first filial generation of scallops and argopecten purpuratus to obtain the first filial generation of interspecific hybridization scallops which normally develop and have remarkable growth and stress resistance advantages, and purifying the three-way filial generation through group mixing; and the new species of the sea-black-black-purple (or black-black-black-black-purple) three-way hybrid scallops with genetic stability and excellent characters can be obtained through continuous breeding. According to the method disclosed by the invention, the excellent characters of the argopecten purpuratus, the argopecten irradians and the Argopecten irradians concentricus can be integrated, so that a new three-way hybrid scallop variety with more remarkable growth and stress resistance advantages is cultivated, and the improved variety preservation and supply capability of the scallop breeding industry is improved.

Description

technical field [0001] The invention relates to the technical field of marine economic shellfish hybrid breeding, in particular to a breeding method based on the triple hybridization of purple scallops, bay scallops and Mexican gulf scallops. Background technique [0002] The scallop of the genus Argopecten is a fast-growing species in the scallop family, mainly distributed along the coast of America. In the 1980s and 1990s, my country successively introduced the northern subspecies of bay scallops (Argopecten irradians irradians, referred to as bay scallops) and the southern subspecies of bay scallops (Argopecten irradians concentricus, also known as Gulf of Mexico scallops), which became the northern and southern subspecies of my country respectively. The main cultured species of scallop in the southern coast has triggered a development climax of my country's aquaculture industry (Zhang Fusui, 2014; Han Jiajun et al., 1998). In 2018, the aquaculture area of ​​the two Gulf ...

AI Technical Summary

Problems solved by technology

However, the first generation of hybrids between purple scallops, Gulf scallops, and Gulf scallops are all male sterile, and the fertilization rate and hatching rate of their eggs are low, which significantly increases the difficulty of breeding new varieties of three-way hybrid scallops