Genetic Analysis of Feather Color and Shank Color Trait Based on F-2 Resource Population in Tibetan Chicken
基于F-2群体的藏鸡羽色、胫色性状的遗传分析

Tibetan chickens were crossed reciprocally with White Leghorn and Shou-Guang chicken respectively,and inter se matings in F_1 were carried out to generate the F_2 population.Feather color and shank color appearance and segregation ratio in F_1 and F_2 were observed.Results indicate that white feather of White Leghorn chicken and black feather of Shouguang chicken exhibit complete dominant heredity to hemp feather of Tibetan chicken.Hemp feather is determined by two or more alleles.Only when these two or more alleles are concurrently present,will hemp feather then be displayed.The Id/id allele that determines shank color demonstrates sex-linked inheritance,and the recessive id is expressed gradually in the homozygotes.We confirm that genotype of shank color in White Leghorn rooster used in this study is the dominant homozygote.