Rotational mating breeding method for pinctada fucata groups

Abstract

The invention discloses a rotational mating breeding method for pinctada fucata groups. The method comprises the following steps of: collecting at least three pinctada fucata groups from different sources, and constructing an F1 generation diallel crossing group; before a breeding season, randomly sampling over 1,000 individuals from every each group for performing character measurement, computing a breeding character average value or a multi-character comprehensive selection index, sequencing according to sizes, and at least selecting five groups serving as cone breeding groups by adopting a last-one-out system; selecting largest female and male individuals from every each selected group, mating male individuals of a No.1 group with female individuals of a No.2 group, mating male individuals of a No.2 group with female individuals of a No.3 group, and so on, and rotationally mating, wherein the ratio of female individuals to male individuals is 2:1, and at least four male individuals are selected; and breeding generation after generation to over five generations. Due to the adoption of the method, high selection strength is realized, genetic gain is increased, and the genetic improvement of every each generation of the bred pinctada fucata can be over 15 percent.

Description

technical field [0001] The invention belongs to a breeding technology, in particular to a method for breeding Hepu pinnacle group rotary mating. Background technique [0002] Hepu mother-of-pearl ( Pinctada fucata ) is an important marine cultured shellfish and the main mother oyster for pearl production. The well-known Hepu pearl, namely "South Pearl" is produced by this shellfish. Hepu pearl oysters mainly live in tropical and subtropical sea areas. The research and production of Hepu pearl oyster cultured pearls in my country began in the middle of the twentieth century. The successful artificial breeding of pearls in 1958 and the success of artificial seedling breeding in 1965 marked the entry of Hepu pearl oyster into the era of full artificial breeding, that is, the use of artificially propagated seedlings for cultivation. Breeding, select mature individuals after cultivation, and then carry out artificial reproduction to form a closed cycle system. After more than 4...

AI Technical Summary

Problems solved by technology

However, these studies all construct a single population, and then select individuals from this single population to construct the next generation population, or use two selective breeding populations to hybridize, and provide hybrid seedlings for farmers to breed, and use the diallex hybridization method to construct multiple populations. population, and then adopt rotational mating technology (rotational mating) for selective breeding. This method has not been reported yet