Pure line breeding method for increasing local chicken breed egg yield

Abstract

The invention discloses a pure line breeding method for increasing the local fowl breed egg yield. The method includes the following steps that (1) the number of eggs laid by individual hens ranging from 21-week-old to 32-week-old, the number of eggs laid by individual hens in the egg laying peak week and the number of weeks of the egg laying peak weeks of all the individual hens are detected and determined; (2) parameter indexes of reserved eggs for breeding are stipulated; the number of the eggs laid by the selected individual breeding hens ranging from 21-week-old to 32-week-old is larger than or equal to 42, the number of the eggs laid by all the individual hens in the egg laying peak week is larger than or equal to 5, and the number of the weeks of the egg laying peak weeks of all the individual hens is larger than or equal to 1, and the number is increased generation by generation; (3) breeding cocks and breeding hens are reserved and mated to form new families, the cocks and the hens which are of the homologous series but not near of kin are selected to form new families, the proportion of the cocks and the hens is 1:10-16, and over forty families form a pure line to breed the next generation of breeding chicken; step (2) and step (3) are carried out repeatedly till over three generations are bred. By means of the method, the egg yield of local chicken can be increased effectively and quickly, the variety breeding effect is remarkable for the local chicken with the low egg yield, the egg yield of breeding chicken is increased over 40% after four generations of breeding, and the generation breeding cycle is advanced by over 10 weeks.

Description

technical field [0001] The invention belongs to the technical field of poultry breeding, and in particular relates to a pure line breeding method for improving egg production of local chicken breeds. Background technique [0002] Breeding, development and utilization of local chicken breeds and improving the laying performance of local chickens are important goals of domestic breeders and production enterprises. There are many breeds of local chickens in our country, and the genetic resources are very rich. According to the records of China Livestock and Poultry Genetic Resources - Poultry Records, there are 116 chicken breeds recorded. It is a breeding direction to use local chicken breeds as breeding materials without adding foreign breeds, and to breed new strains or matching lines. However, local chicken breeds are formed under long-term traditional folk breeding and different geographical environments. They have few eggs, short laying period, and strong nesting ability...

AI Technical Summary

Problems solved by technology

However, local chicken breeds are formed under long-term traditional folk breeding and different geographical environments. They have few eggs, short laying period, and strong nesting ability. Seriously uneven, the highest record of an individual's annual egg production is 145, while the lowest is only about 40 (annual production of 2 to 3 nest eggs), most of them stop production at about 50 weeks of age, and the egg production period is less than 6 months ; Unselected local chicken breeds are not suitable for large-scale and industrial production, and the economic benefits of raising breeders or raising commercial broilers are poor

For the selection and breeding of local chicken breeds, if conventional breeding methods are used to identify the egg production performance of the hen, the next generation will be bred after the egg production performance identification is completed at the age of 43 weeks. , it is very difficult to save eggs for the next generation, and it is not easy to keep enough eggs for reproduction, which often results in the inability to continue breeding