Seed production method of oyster high-temperature-resistant strain

Abstract

The invention belongs to the field of shellfish genetic breeding in the marine biotechnology, and particularly relates to a seed production method of an oyster high-temperature-resistant strain. Intertidal zone oysters with the shell height larger than 1.5 cm and without damage serve as parents of a core basic group, the parents are fattened in a subtidal zone sea area in a group self-propagationmanner and then bred to obtain a basic group, and then each generation of young oysters are repeatedly placed in an intertidal zone in summer to be subjected to temperature shock stress; and group breeding is carried out after fattening breeding is carried out in the subtidal zone sea area, and then the high-temperature-resistant strain with genetic stability is obtained. According to the method,the technical difficulties of poor nutritional basis, low egg laying amount, breeding difficulty and the like of the oysters in the intertidal zone are overcome, the phenotypic plasticity of the resistance traits of the oysters in the extreme environment of the intertidal zone is utilized in the seed production process, the breeding efficiency is improved, the breeding period is shortened, and thesurvival rate of the oysters in the high-temperature period in summer is remarkably increased. The invention provides a new way for cultivating a new high-temperature-resistant oyster variety, and can also provide a new improved variety for the oyster cultivation industry.

Description

technical field [0001] The invention belongs to the field of shellfish genetics and breeding in marine biotechnology, and in particular relates to a seed production method of oyster high temperature resistant strains. Background technique [0002] Oysters are naturally distributed in the mid-tidal zone to the subtidal zone in the intertidal zone, and are highly susceptible to extreme environmental impacts. Oysters are prone to large-scale mortalities in summer, causing heavy losses to the industry. High temperature is one of the most important environmental factors leading to this problem, and cultivating high temperature resistant strains is an effective technical approach. Conventional family breeding can improve the high temperature tolerance of oysters to a certain extent, but there are problems such as long cycle, high cost and low efficiency. However, because oyster germplasm in the intertidal zone has problems such as small size, poor nutritional foundation, and dif...

AI Technical Summary

Problems solved by technology

Conventional family breeding can improve the high temperature tolerance of oysters to a certain extent, but there are problems such as long cycle, high cost and low efficiency

However, the oyster germplasm in the intertidal zone has problems such as small size, poor nutritional foundation, and difficulty in cultivating offspring. At present, the germplasm source of oyster breeding projects is basically in the subtidal zone.