论文部分内容阅读
Chicken sex-linked barred plumage locus was a dominant locus on chicken Z chromosome. The locus could be utilized to produce phenotypes that identify the sexes of chicks at hatching without crossing in pure line chicken production. But the locus mapping lagged behind the sex-linked silver feather locus and the sex-linked slow feathering locus. Here 28 single nucleotide polymorphisms on chicken Z chromosome were genotyped and made use of association study with barred plumage locus. The results showed certain single nucleotide polymorphism (CZ23) at 52148321 bp on Z chromosome was high significantly associated with barred plumage phenotype. The useful extent of linkage disequilibrium was around 1 Mb in the experimental chicken population. Thus a barred plumage locus was in the region from 51.1 Mb to 53.1 Mb. Bioinformatics analyses indicated that CZ23 existed in the twelfth intron of LOC427290 gene. The three genes, LOC427290, LOC769710 and LOC427291, were predicted as candidate genes for sex-linked barred plumage phenotype.