High-intensity selecting and remaining method of good carp parents

Abstract

The invention relates to a high-intensity selecting and remaining method of good carp parents. At present, in a selective breeding process of carps, the selection of standby parent fishes can be carried out only once within a breeding cycle, and the selection intensity is about 10 percent, i.e. 1 / 10 parents are reserved as standby parent fishes. Generally, a breeding cycle of the carps needs 2-3 years, and the selective breeding of a good breed needs to go through a plurality of breeding cycles, thus the prior breeding method for selecting and remaining the parents needs a relatively longer time to achieve a good breed. In order to overcome the defects that the selection can be carried out only once, the selection proportion is higher and the breeding pertinence is weaker in the selectingand maintaining process of the carp parents at present, the selection is carried out for multiple times aiming at main economic traits according to different growth and development stages of the samegeneration of fishes from fish fries to ripe fishes for laying eggs, and the selection intensity is improved, and the selections of a generation are equal to the selections of multiple generations, thus the time for selective breeding is greatly shortened, and the selection effect is improved.

Description

Technical field: [0001] The invention belongs to fish breeding technology, and specifically relates to a method for selecting and retaining carp parents. Background technique: [0002] At present, in the selective breeding process of carp, reserve parent fishes are selected, and only one selection is carried out in one breeding cycle. The selection intensity is about 10%, that is, keep one-tenth of the parental individuals as backup broodstock. A reproductive cycle of carp generally takes 2-3 years, and the selection and breeding of an excellent variety needs to go through multiple reproductive cycles. This kind of breeding method of selecting and retaining parents requires a relatively long period of time to achieve the goal of good varieties, and it is often necessary to select multiple goals at the same time according to needs, resulting in the selection effect is not obvious. Invention content: [0003] In the process of carp selection, the fewer fish individuals are...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that in the current carp parent selection process, one breeding cycle is only selected once, the selection ratio is relatively high, and the breeding pertinence is relatively weak. The main economic traits are selected multiple times, and the selection intensity is increased. One generation is equal to the selection of multiple generations, which greatly shortens the number of years of selection and breeding and improves the selection effect.