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Differences of Z chromosome and genomic expression between early- and late-feathering chickens

文献类型： 外文期刊

作者： Luo, Chenglong 1 ; Shen, Xu 1 ; Rao, Yousheng 3 ; Xu, Haiping 1 ; Tang, Jun 1 ; Sun, Liang 1 ; Nie, Qinghua 1 ; Zhang, Xi 1 ;

作者机构： 1.S China Agr Univ, Coll Anim Sci, Guangzhou 510642, Guangdong, Peoples R China

2.State Key Lab Livestock & Poultry Breeding, Guangzhou 510640, Guangdong, Peoples R China

3.Jiangxi Educ Inst, Dept Biol Technol, Nanchang 330029, Peoples R China

关键词： Chicken;Late-feathering;Differentially expressed gene;PRLR

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： One duplicated segment on chicken Z chromosome is a causal mutation to the late-feathering phenotype. However, understanding biological process of the late-feathering formation is also of interest to chicken breeding and feather development theory. One hundred and thirty-seven valid single nucleotide polymorphisms (SNPs) from an SNP database were used to perform an association study of the Z chromosome in Xinghua chickens. Two SNPs, which were respectively on 9607480 bp and 10607757 bp, were significantly associated with feathering phenotypes. This result indicated the causal mutation of the late-feathering formation in Xinghua chickens was consistent with the previous report which showed the late-feathering locus ranged 9966364-10142688 bp on Z chromosome. Microarray expressions were implemented for six 1-day-old female Xinghua chicks. Compared to the early-feathering chicks, there were 249 and 83 upregulated and downregulated known genes in the late-feathering chicks. Forty-one genes were expressed in late-feathering chicks, but not in early-feathering ones. At least 14 significantly differentially expressed genes were directly related to keratin. In the region of the sex-linked feathering gene, only prolactin receptor (PRLR) gene was a significantly differentially expressed gene. Expression of PRLR in late-feathering chicks was 1.78-fold as that in early-feathering chicks. Late-feathering Wenchang chicks also had higher expression level of PRLR than early-feathering ones. This study suggested that increasing PRLR expression that resulted from the special variant on chicken Z chromosome caused the late-feathering phenotype.

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