A seed production method for improving the survival rate of long oysters in summer

Abstract

The invention relates to the field of shellfish genetics and breeding in marine biotechnology, in particular to a seed production method for improving the summer survival rate of long oysters. The method includes the steps of parent selection, breeding line construction, spat optimization, germplasm purification and the like. The invention utilizes the resistance characteristics of oysters at different developmental stages, and uses two extreme acute environmental stresses of dry dew and high temperature to efficiently screen oysters at the spat stage and adult stage, respectively, so as to improve the efficiency of breeding and shorten the selection time. The breeding cycle can significantly improve the summer survival rate of oysters. The method has the advantages of strong practicability, remarkable effect and easy popularization. The germplasm of new strains of oysters with high summer survival rate can be obtained through the invention, and the systemic risk of the oyster breeding industry can be significantly reduced.

Description

technical field

[0001] The invention relates to the field of shellfish genetics and breeding in marine biotechnology, in particular to a seed production method for improving the summer survival rate of long oysters. Background technique

[0002] Long oyster is a traditional cultured shellfish in northern my country, and it is also the oyster species with the largest breeding volume and the widest distribution in the world. Long oysters are usually cultured in open seas, where environmental factors cannot be intervened by humans. In the past ten years, the mass mortality of long oysters in summer has occurred frequently all over the world, and the mortality rate in some countries’ sea areas can reach 50%-90%, which poses a major threat to oyster production and is a bottleneck factor for the stable and healthy development of the oyster industry. . Improving the summer survival rate of long oyster is the focus of the oyster industry. However, due to the complex factors affect...