Ietalurus punetaus half-sib family large-scale building method

Abstract

The invention discloses an ietalurus punetaus half-sib family large-scale building method. The method comprises the steps that 1, parents are bred; 2, a paternal line half-sib family is built; 3, mating and oviposition are conducted; 4, egg masses are incubated, wherein PIT electronic markers are injected into females laying eggs; 5, artificial spawning is conducted, wherein the females are put into an ovipositor to mate with males after injection; 6, after oviposition is completed, the egg masses are taken out for subsequent incubation, and meanwhile the females and the males who lay the eggs are taken out, injected with the PIT electronic markers and put into a pond to continue to be bred, and serve as reproduction of the subsequent year. By means of the method, the ietalurus punetaus half-sib family large-scale building success rate is significantly increased, and the family building cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of channel catfish breeding, and in particular relates to a method for establishing a large-scale channel catfish half-sib family. Background technique [0002] Channel catfish (Ictalures punctatus) originated in the United States and was introduced to my country for trial breeding in 1984. It has developed rapidly in just over 30 years, and has successively broken through technical difficulties in breeding, breeding, feed, processing and exporting. It has established a complete industrial chain from seed breeding, breeding, processing, and marketing. The output has also increased sharply from the initial few thousand tons and stabilized at more than 200,000 tons. It has become one of the main varieties exported to the United States in my country. However, the source of germplasm cannot be guaranteed, and the level of inbreeding in generations of cultured populations has continued to increase. The phenomenon ...

AI Technical Summary

Problems solved by technology

However, in the actual construction of half-sib families of channel catfish, the development of the gonads of the parents is asynchronous, and the quantity and quality of eggs laid by female fish are unstable, resulting in the problems of low half-sib construction efficiency and long construction period of half-sib families

[0004] So far, there have been no relevant reports on the large-scale construction method of channel catfish half-sib families