A method for constructing the basic population of Litopenaeus vannamei based on genetic information and excellent traits

Abstract

The invention provides a Litopenaeus vannamei base population establishing method based on genetic information and excellent properties. The method comprises the following detail steps that multiple Litopenaeus vannamei populations with different excellent properties are selected, the genetic relationship among introduced individuals is analyzed by using molecular markers, a hybridization scheme is designed based on the genetic relationship information and excellent property information, and a great numbers of families are established to form a Litopenaeus vannamei base population with relative abundant heritable variation and excellent properties. According to the method, in the establishing process of the Litopenaeus vannamei base population, the molecular markers are used for detecting the genetic relationship among different individuals and designing the hybridization scheme, inbreeding can be avoided, genetic linkages can be broken through, sufficient recombination and orientated mating can be acquired, continuity and scientificity of breeding work are guaranteed, thus the acquisition of Litopenaeus vannamei base populations with the relative abundant heritable variation and excellent properties can be facilitated, therefore, genetic improvement and production performance improvement can be further carried out on the later generations of the Litopenaeus vannamei to a large extent, and better economic benefit is brought.

Description

Technical field [0001] The invention belongs to the technical field of genetic breeding, and specifically relates to a method for constructing a basic population of Litopenaeus vannamei based on genetic information and excellent traits. Background technique [0002] In order to implement selection and improvement in breeding, it is necessary to have a complete basic group, which is also an important basis for breeding. As a basic population, it must have abundant genetic variation and excellent genes that need to be improved. Practice has proved that the establishment of a population with a rich genetic basis is a key factor to improve the breeding effect, but it is not that the larger the population, the better, because the more the group material, the greater the chance of bad genes being mixed into the population, which will inevitably affect the germplasm of the basic population. In order to ensure the genetic diversity of the basic population, reduce the infiltration of bad...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for constructing the basic population of Litopenaeus vannamei based on genetic information and excellent characters. The present invention has obtained the basic population of Litopenaeus vannamei with higher genetic diversity and more excellent genes, and solved the problem in In the process of selective breeding, due to the unclear genetic background of the introduced population, the high level of inbreeding in the basic population and insufficient genetic variation have resulted in limited progress in the breeding of Litopenaeus vannamei

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