Breeding method for selfing prior to hybridizing of whiteleg shrimp populations

Abstract

The invention provides a breeding method for selfing prior to hybridizing of whiteleg shrimp groups, which is characterized by including: selecting whiteleg shrimp populations with excellent seed sources, clear genetic background and close relation between individuals in the same population; selecting the individuals from the same population, and performing close inbreeding to produce self-bred offspring; selecting the self-bred offspring generated by close inbreeding based on merit, and establishing fundamental breeding populations subjected to inbreeding purification; selecting the fundamental breeding populations with character complementation for inter-population hybridization so as to obtain offspring seeds with heterosis. The method has the advantages that the fundamental breeding populations are established by selfing passage and selection, young shrimps produced by inter-population combined hybrid breeding are higher in resistance to low temperature and low saline, and the production speed in the cultivation period is faster.

Description

technical field [0001] The invention relates to a breeding method of first selfing and then hybridization among Litopenaeus vannamei populations. Background technique [0002] Litopenaeus vannamei is an imported species in China, and there is no natural distribution in China. The price of species imported from the United States is high, and only the first generation of offspring has excellent traits. With the increase of breeding generations, the economic traits degrade generation by generation. In order to retain the excellent characters of the introduced varieties, it is necessary to intervene by means of artificial breeding. At present, domestic and foreign studies on artificial breeding of Litopenaeus vannamei mostly adopt family selection, and the genetic background of each family is accurate, which is conducive to improving the efficiency of artificial breeding. However, the establishment of a family line requires heavy workload, complicated process, large invest...

AI Technical Summary

Problems solved by technology

However, the establishment of a family line requires heavy workload, complicated process, large investment, and high risk. It is difficult for seedling enterprises in production to meet the requirements for facilities and equipment for family selection and breeding.

Family selection, the speed of breeding shrimp is slow, and it is difficult to meet the demand for high-quality shrimp in large-scale artificial breeding production