Family breeding method for Penaeus chinensis 'Huanghai No.1' with high ammonia nitrogen resistance and high pH value

Abstract

The invention discloses a family breeding method for Penaeus chinensis 'Huanghai No.1' with high ammonia nitrogen resistance and high pH value. The method comprises the following steps of: collecting the Penaeus chinensis 'Huanghai No.1' bred in various areas to construct base groups; then, selecting parent shrimps from different groups, and establishing families according to the complete diallelcross mode to separately grow the larvae and breed; respectively carrying out a high ammonia nitrogen and high pH value stress test on each family at the larvae I stage (P1 stage) and on the day whenthe larvae is 150-day old, and screening the families with high tolerance by combining with the breeding survival rate to carry out breed conservation; in the following year, establishing the families by taking the conservation families as the parents and adopting a nested design, and then breeding in the families; and in the third year, carrying out small-scale demonstrated breeding on the screened families, and determining and estimating the adaptive capacities of the screened families to environment. The method of the invention has the advantages of realizing the polymerization and accumulation of the growth and stress resistance characters of the penaeus chinensis, cultivating new anti-stress strains or varieties after further breeding is performed, providing the adaptability of penaeus chinensis to different breeding environments, and having great significance for the variety replacement of the penaeus chinensis.

Description

Technical field: [0001] The invention belongs to the genetic improvement of Chinese prawns and the breeding technology of fine varieties, and specifically relates to a breeding method for families of Chinese prawns resistant to high ammonia nitrogen and high pH value. Background technique: [0002] Chinese prawn is a unique local species in my country, and it is also one of the main species of prawn farming. At present, there are three main limiting factors that affect the sustainable, stable and healthy development of my country's shrimp farming industry: seed, disease and breeding environment. my country has carried out a lot of scientific research work on the breeding of Chinese shrimp species and the research on diseases. In terms of variety selection and breeding, two new varieties of Chinese prawn "Huanghai No. 1" and "Huanghai No. 2" have been bred, which have excellent traits of fast growth and strong resistance to WSSV respectively. In terms of disease control, du...

AI Technical Summary

Problems solved by technology

Argue et al. (Hawaii Institute of Oceanography, 2002) used family selection to establish growth and TSV-resistant strains, and used the established family to estimate the heritability and genetic correlation of the two traits, but related reports were limited to growth and disease resistance Breeding research on sexuality and other aspects, there is no related research on breeding environment stress factors as breeding targets, and there is no detailed report on the family mating design scheme in the process of family breeding