Breeding method for shellfish meat trait new strain

Abstract

The invention discloses a breeding method for a shellfish meat trait new strain. The breeding method comprises the following steps: firstly constructing more than 20 full-sib and / or half-sib families, and breeding all the families in different sea areas; performing meat trait index measurement and apparent index measurement on all the bred families; then screening out meat trait indexes with the heritability larger than 0.2, and screening out indexes with the genetic correlation absolute value larger than 0.5 between the meat trait indexes and the appearance indexes; screening out candidate parent families according to the retention rate of 20 percent, and selecting optimal individuals from the candidate parent families to be used as reproduction parents according to the appearance trait indexes; finally carrying out generational breeding according to the breeding method, and finally forming the new strain with high meat trait index. According to the breeding method, on the premise that a research object is not dissected, a method of combining family selection and within-family selection is adopted for breeding the meat trait index from the directly measurable appearance indexes by indirect breeding.

Description

technical field [0001] The invention relates to a breeding method for new biological strains, in particular to a breeding method for new strains with meat quality traits of shellfish. Background technique [0002] Shellfish is an important economic species and pillar industry in my country's mariculture. It has the advantages of less investment, quick results, high economic benefits, and good ecological effects. However, at present, there is a lack of good species in shellfish farming, and it mainly relies on wild seedlings or wild (introduced) broodstock for reproduction. The offspring have poor meat quality, large individual differences, and weak stress resistance. The problems of disease and death are becoming more and more serious, and the breeding efficiency is low. Therefore, it is of great significance to cultivate new species (lines) of high-quality, high-yield and stress-resistant shellfish to improve breeding efficiency. [0003] With the continuous improvement of...

AI Technical Summary

Problems solved by technology

However, at present, there is a lack of good species in shellfish farming, and it mainly relies on wild seedlings or wild (introduced) broodstock for reproduction. The offspring have poor meat quality, large individual differences, and weak stress resistance. The problems of disease and death are becoming more and more serious, and the breeding efficiency is low.