Culture method of hybrid new variety of Argopecten irradias and Argopecten purpuratus

Abstract

The invention relates to a culture method of a new hybrid variety of Argopecten irradias and Argopecten purpuratus. The culture method comprises the following steps of fertilizing Argopecten irradias eggs with Argopecten purpuratus sperms to build multiple hybrid first filial generation lines, selecting excellent hybrid lines according to phenotype of each hybrid line, selecting excellent hermaphroditic individuals from the excellent hybrid lines, maturing the excellent hermaphroditic individuals, and then carrying out self-fertilization to build multiple selfing lines; selecting excellent lines from the selfing lines, selecting excellent hermaphroditic individuals from the excellent lines, carrying out selfing and selecting; and carrying out selfing for more than three generations according to the same method to obtain the new hybrid variety of Argopecten irradias and Argopecten purpuratus. The obtained new hybrid variety of Argopecten irradias and Argopecten purpuratus has stable inheritance, rapid growth, large size and wide temperature tolerance range. The culture method also can be implemented by adopting a colony culture method. Since the obtained new hybrid variety of Argopecten irradias and Argopecten purpuratus has the excellent characteristics of Argopecten irradias and Argopecten purpuratus at the same time, the new hybrid variety can be cultivated in Qingdao, Dalian and other northern sea areas and the yield is improved by more than 30% as compared with the yield of bay scallop.

Description

technical field [0001] The invention belongs to the breeding technology of shellfish aquaculture, in particular to a method for cultivating a new variety of sea purple hybrid scallop. 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. Due to the long-term inbreeding after the introduction, the germplasm of bay scallops has been severely degraded during the breeding process, showing that the size of commercial shellfish is getting smaller and smaller, and the mortality rate in the breeding process is high. For example, in 2007, the mortality rate of bay scallop broodstock reached ...

AI Technical Summary

Problems solved by technology

1) Due to the genetic instability of the first generation of hybrids and the separation of growth traits in the offspring, it is necessary to use purple scallops and bay scallops for seed production every year, which is relatively cumbersome; Summer and winter, and grow slowly in my country's sea areas, so it is quite difficult to obtain purple scallop broodstock for breeding the first generation of hybrids

3) Since bay scallops and purple scallops are both hermaphroditic scallops, sperm and eggs are released at the same time, and the sperm or eggs are easily polluted by eggs or sperm of the same species, and it is difficult to perform interspecific hybridization, resulting in the true The proportion of hybrid offspring is greatly reduced, which greatly limits the increase in yield

[0005] Obviously, there are great difficulties in popularization because of the need to breed two kinds of broodstock at the same time and it is difficult to realize the hybridization between two hermaphroditic scallops