Construction method and application of Haizi hybrid scallop restorer line

Abstract

The invention relates to a construction method and application of an argopecten irradians-argopecten purpuratus hybrid scallop restorer line. The restorer line is argopecten purpuratus which can recover the male fertile characteristic for male sterile line progeny, wherein argopecten irradians-argopecten purpuratus hybrid scallops are hybrid progeny of argopecten irradians eggs and argopecten purpuratus sperms. The construction method includes the steps that excellent individuals in a male sterile line are selected, the different argopecten purpuratus sperms are used for continuous backcross until the progeny are all hermaphrodite, and the restorer line of the male sterile line is obtained; finally, the restorer line is hybridized with the corresponding male sterile line of the argopecten irradians-argopecten purpuratus hybrid scallops to produce argopecten irradians-argopecten purpuratus hybrid scallop commodity seeds. The restorer line of the male sterile line is set up in animals for the first time, the obstacle to self-fertilization in hybridization of hermaphrodite scallops is effectively overcome, and the yield of the produced argopecten irradians-argopecten purpuratus hybrid scallops in the current year is larger than that of argopecten irradians and is increased by over 50%.

Description

technical field

[0001] The invention belongs to shellfish breeding technology-a method for cultivating commercial hybrid scallop seedlings, and in particular relates to a construction method and application of a restorer line of sea purple hybrid scallop (the hybrid offspring of bay scallop ova and purple scallop sperm). Background technique

[0002] The bay scallop (Argopecten irradians irradians) is native to the Atlantic coast of the United States and was introduced to my country in 1982. The bay scallop grows fast, has a wide range of temperature adaptability, and has strong stress resistance. It is very suitable for farming in the northern seas of my country. At present, the output and farming area account for more than 50% of the scallop farming in my country. However, due to the long-term inbreeding after the introduction, the germplasm of bay scallops has been seriously degraded during the breeding process. The size of commercial shellfish is getting smaller and smal...