Descendant determining method for the development of yellow catfishes, snakehead super male fishes and all male fishes

Abstract

The invention discloses a descendant determining method for the development of yellow catfishes, snakehead super male fishes and all male fishes. The method comprises the following steps: (1) controlling the sex by the hormone of the yellow catfishes and the snakehead super male fishes; (2) testcrossing and screening pseudo males; (3) obtaining all female groups and pseudo female groups; (4) testcrossing by the pseudo males and screening the pseudo females; (5) testcrossing by the all female groups and screening YY males and YY females to form super male lines. Compared with the prior art, the descendant determining method for the development of the yellow catfishes, the snakehead super male fishes and the all male fishes has the advantages of easiness in operation, high efficiency, low risk in breeding and high testcross efficiency, overcomes the problem of the uncertainty for traditionally developing the all male offspring seeds of XX-XY genotype farmed animals, and reduces the counting difficult.

Description

technical field [0001] The invention relates to the field of genetic breeding of aquatic animals, in particular to a method for determining the descendants of yellow catfish, snakehead super-male and all-male development. Background technique [0002] In aquaculture, there are differences in economic traits between male and female individuals of many cultured species, such as growth rate, individual size and size of edible (medicinal) parts. Therefore, the production of single-sex seedlings for breeding can significantly improve economic benefits by controlling sex. For example, yellow catfish or black snakehead, male fish grow faster than female fish, and the final individual is larger. Therefore, selecting all-male or male-majority fry during the breeding process can significantly increase the breeding efficiency. [0003] At present, the conventional methods for cultivating parthenogenetic seedlings mainly include hormone feeding method, distant hybridization, artificial...

AI Technical Summary

Problems solved by technology

However, in the actual breeding operation process, due to the occurrence of breeding conditions, sampling quantity, and the occurrence of killings accompanying the fry breeding process, the sex ratio of the sampling population deviates seriously from the theoretical ratio, which makes it necessary to carry out parental genetic analysis strictly based on the sex ratio of offspring. There are great uncertainties in the judgment results of the method of type distinction