Method for optimal seedling selection and breeding of novel carassius auratus gibelio series

Abstract

The invention relates to a method for optimal seedling selection and breeding of novel carassius auratus gibelio series, which comprises the following steps: (1) extracting an egg of a Fangzheng crucian carp; (2) extracting a sperm of a Xingguo red carp; (3) stimulating the female nucleus of the egg of the crucian carps for development to generate an offspring through the sperm of the Xingguo red carp; (3) extracting a sperm of a grass carp and a sperm of a megalobrama amblycephala, and extracting an egg of the offspring generated in the previous step; (5) stimulating the female nucleus of the egg of the offspring generated Step (3) for development with the sperm of the grass carp and the sperm of the megalobrama amblycephala; and (6) breeding the improved seedling. The invention has the following technical effects that: 1) the novel carassius auratus gibelio series with genetic stability can be obtained; 2) the sporozoon resistance of the bred novel carassius auratus gibelio series can be significantly improved; 3) the growth speed of the bred novel carassius auratus gibelio series is high, and the intestinal length / full length is increased, thereby facilitating the improvement of the digestibility; and 4) the thickness of the dorsal muscles and the tightness of the scales of the bred novel carassius auratus gibelio series are improved, the survival rate in the long-distance transport is more than 95 percent, the visceral mass is reduced, the body length is increased, and the intramuscular bones are decreased.

Description

technical field [0001] The invention relates to an artificial seedling raising method for freshwater fish, in particular to a method for optimizing seedling breeding of a new strain of heterogeneous gibel carp. Background technique [0002] Allogenetic gibel crucian carp is a new breeding object for crucian carp successfully developed by fish breeding experts from the Institute of Hydrobiology, Chinese Academy of Sciences from 1976 to 1981. As the male parent, the offspring bred by artificial insemination. The fish has good heterosis, and the effect of increasing production is obvious. The meat is tender and nutritious, and it can survive out of water for a long time. It can transport live fish in short and medium distances under low temperature and anhydrous conditions. The advantage of heterogeneous gibel carp is that it has the characteristics of fast growth, large individual, strong stress resistance, etc., and it shows good economic traits in aquaculture production. 1...

AI Technical Summary

Problems solved by technology

[0003] However, the existing heterogeneous gibel carp also has certain shortcomings: 1. The genetic traits of the offspring are not stable enough; 2. The resistance to sporozoites is not high enough; 3. The growth rate is not fast enough; 4. The long-distance transportation process There is still a high death rate in