-
How to Carry Out Selective Breeding and Breed Conservation in Jian Carp Farming
Any superior breed, if selective breeding and breed conservation are neglected, will often lead to breed degradation, reduced yield and deterioration of other traits. Jian carp has stable genetic traits and can, through within-breed reproduction, pass the superior traits of this breed on to its offspring. However, different carp breeds easily interbreed and become mixed, individuals within the same breed also differ, and the living environment can have a considerable effect on the traits of a breed. Therefore, attention must be paid to selective breeding of superior stock: according to the breed's standards, fish with good traits in all relevant respects should be selected as broodstock for rearing and allowed to reproduce.
-
Detailed Explanation of Key Points of Artificial Selective Breeding Techniques for Snakes
Strengthening artificial selective breeding of snakes is of great significance for improving snake reproduction survival rates, growth and development speed, product quality and economic benefits. It is work that snake farms cannot afford to neglect, and it must be carried out year-round with unremitting effort. In selective breeding, the following three points should be well handled: 1. Selection of breeding eggs. Breeding eggs placed for incubation must be fresh and of high quality. Eggs stored for a long time have a low hatch rate and a high mortality rate; the hatchlings are weak and grow slowly. Therefore, female snakes should be checked frequently before laying eggs. When eggs are found to be approaching the cloaca, they should be promptly
条件筛选