A multi-level standardized breeding method within a shrimp family

Abstract

The invention discloses a multi-level standardized breeding method within a shrimp family. The method includes the following steps: Step 1: establish a full-sib family or a half-sib family of shrimp, measure multiple target traits, and obtain multiple traits Test results; at the same time, the selection index in the full-sib family or half-sib family is obtained; then, based on the multi-trait test results and selection index, a breeding plan is formulated to construct the next generation of families as a breeding group; Step 2: in each Within the family as a breeding group, at least two levels of standardized selection are carried out at different stages of growth and development to determine the final reserve individual. The application of the present invention can improve the accuracy and reliability of breeding individuals, and provide comprehensive genetic progress in breeding.

Description

technical field [0001] The invention belongs to the technical field of aquatic genetics and breeding, and in particular relates to a multi-level standardized breeding method in a shrimp family. Background technique [0002] In a pedigree selective breeding system, genetic progress mainly depends on the heritability and selection intensity of the target trait. When the basic population construction has been completed and the parameters such as heritability have been fixed, expanding the size of the breeding population and increasing the selection intensity is one of the main ways to further improve the genetic progress. Shrimp has high fecundity, and the average number of eggs laid per female shrimp is as high as 300,000-500,000, which is suitable for large-scale family breeding. [0003] In shrimp selective breeding, standardized selection is extremely important, and has a great impact on improving the accuracy and reliability of breeding. In the prior art, standardized se...

AI Technical Summary

Problems solved by technology

This method has a single standardized selection, less selection times, and low selection intensity, which is easy to cause gene purification, and it is difficult to improve the accuracy of breeding, especially limiting the comprehensive genetic progress of multi-trait selection.

Moreover, the selective breeding of shrimp requires a very large capital investment, involving multiple factors such as personnel, technology, site, facilities, equipment and management. If the selective breeding process cannot be fully utilized, the resource utilization rate will be low.

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