Method for establishing hybrid line of Japanese white crucian carp and red crucian carp and cultivation method of zygotic crucian carp No. 2

Abstract

The invention discloses a method for establishing a hybrid line of Japanese white crucian carp and red crucian carp, wherein a female Japanese white crucian carp and male red crucian carp obtained byartificial induction of gynogenesis are raised as a female parent and a male parent respectively. The offspring obtained from hybrid are raised and screened to obtain diploid zygotic crucian carp F1 which is amphoteric fertile; the diploid zygotic crucian carp F1 is cultivated and is subjected to self-cross to obtain zygotic crucian carp F2 which is amphoteric fertile, amphoteric fertile diploid zygotic curucian carp Fn is obtained through self-cross at least twice. A diploid hyprid crucian carp line which is stable in inheritable characters and amphoteric fertile is obtained. The line has important significance in fish genetic breeding and biological evolution and provides high-quality germplasm resources for breeding novel fine crucian carp. The invention also discloses a cultivation method for the zygotic crucian carp No. 2, which is obtained by backcrossing breeding male Japanese white crucian carp F1 with female parent zygotic crucian carp No. 1. The method is simple and easy to operate. The zygotic crucian carp No.2 has high dorsum, grows fast, has sweet and tender meat, and is strong resistance to stress and diseases.

Description

technical field [0001] The invention belongs to the field of fish hybridization, and in particular relates to a method for establishing a hybrid strain of Japanese white crucian carp and red crucian carp and a method for cultivating Hefang crucian carp No. 2. Background technique [0002] Japanese white crucian carp (Carassius auratus cuvieri) belongs to the family Cyprinidae, belongs to the genus Carassius, and the carassius species (Carassius auratus) is a diploid fish (2n=100). Japanese white crucian carp was formerly known as Yuanwulang crucian carp or Hanoi crucian carp, Dagu crucian carp, Osaka crucian carp, and Japanese crucian carp. Originally produced in Lake Biwa, Japan, it was introduced to my country in 1976. It is named "white crucian carp" because of its silvery-white body color. The Japanese white crucian carp is large in size, the largest individual can reach five catties, its body is tall and flat on the side, its back has a prominent bulge, like a hunchbac...

AI Technical Summary

Problems solved by technology

Although the Japanese white crucian carp grows fast, the meat quality is not good; although the red crucian carp is sweet and tender, its growth rate is not as good as that of the Japanese white crucian carp.

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