Construction method of superior strains of rapid-growing crassostrea gigas

Abstract

The invention discloses a construction method of superior strains of rapid-growing crassostrea gigas. The construction method is characterized by comprising the following steps: A. building a breeding base population, using the shell height and the total weight as a seed selection goal, and keeping and collecting parent shellfish according to high-selective intensity as the basic parent shellfish population; B. by adopting the population continuous progeny selection, selecting a certain number of gonadal matured individuals from the preceding generation of parent shellfish population to form a succeeding generation parent shellfish population, conducting artificial insemination by adopting a post-mortem method; at the pre-maturation period, keeping and collecting the individuals with high shellfish height and high total weight according to the high selective intensity as the parent shellfish for breeding; C, conducting the quantitative character detection and the genetic parameter estimation on the succeeding generation parent shellfish population in step B; D, repeating steps B and C while performing the genetic diversity analysis on three generations of the continuous progeny selection systems, and conducting the evaluation of the breeding effect. With the adoption of the construction method of the superior strains of the rapid-growing crassostrea gigas, the breeding progress is largely speeded up, the labor cost of breeding is reduced, the breeding effect is obvious, and the economic benefit of breeding the crassostrea gigas is improved.

Description

technical field [0001] The invention belongs to aquatic genetics and breeding techniques, in particular to a method for constructing an excellent strain of fast-growing long oyster. Background technique [0002] Long oyster (Crassostrea gigas), native to Japan, China and South Korea, has the advantages of strong environmental adaptability, fast growth, delicious flavor and rich nutrition. It is the economic shellfish with the widest breeding range and the highest yield in the world. One of the most important mariculture species. At present, my country's long oyster production areas are mainly concentrated in coastal areas such as Shandong, Liaoning, Zhejiang, Fujian, and Guangdong. The annual output has reached several million tons, and significant economic and social benefits have been achieved. Due to the low quality and poor specifications of long oysters cultured in my country, they cannot enter the international mainstream market. Therefore, cultivating high-quality va...

AI Technical Summary

Problems solved by technology

Simultaneously, the present invention can also be used for cultivating new species of long oysters, solving