Inferring Genome Ancestry and Estimating Molecular Relatedness Among 187 Chinese Maize Inbred Lines

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	Inferring Genome Ancestry and Estimating Molecular Relatedness Among 187 Chinese Maize Inbred Lines
	Chuanxiao Xie; Shihuang Zhang; Minshun Li; Xinhai Li; Zhuanfang Hao; Li Bai; Degui Zhang; Yehong Liang
刊名	Journal of Genetics and Genomics
	2007
卷号	34 期号:8 页码:738-748
关键词	maize genetic diversity relatedness linkage disequilibrium association analysis
ISSN号	1673-8527
其他题名	推测187份玉米自交系基因组血统与分子亲缘关系
英文摘要	The inference of genome ancestry and the estimation of molecular relatedness are of great importance for breeding efficiency and association studies. Seventy SSR loci, evenly distributed in 10 chromosomes, were assayed for polymorphism among 187 commonly used maize (Zea mays L.) inbreds which represent the genetic diversity in China. The identified 290 alleles served as raw data for estimating population structure using the coalescent linked loci, based on the ADMIXTURE model. Population number, K, has been inferred to be between five and seven. Specifying five subpopulations (K = 5) led to a distinct decrease and specifying K to be greater than six resulted in only minimal increases in the likelihood value. Therefore, population number, K, has been inferred into six subpopulations, which are PA, BSSS (includes Reid), PB, Lan (Lancaster Sure Crop), LRC (Luda Reb Cob, a Chinese landrace, and its derivatives), and SPT (Si-ping-tou, a Chinese landrace and its derivatives). The Kullback-Leibler distance of pairwise subpopulation was also inferred as n ?p (187 ?6) Q matrices, which gave a detailed percentage of genetic composition of six subpopulations and molecular relatedness of each line. The genome-wide linkage disequilibrium (LD) indicated that the asso-ciation studies in QTLs and/or candidate genes might avoid nonfunctional and spurious associations, as most of the LD blocks were broken among diverse germplasm. The defined population structure has given us a clear genetic structure of these lines for breeding practice and established a good basis for association analysis.
学科主题	遗传学
语种	英语
内容类型	期刊论文
源URL	[http://ir.nais.net.cn/handle/2HMLN22E/131300]
专题	作物科学研究所
作者单位	Institute of Crop Science, Chinese Academy of Agricultural Sciences, National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, 100081
推荐引用方式 GB/T 7714	Chuanxiao Xie,Shihuang Zhang,Minshun Li,et al. Inferring Genome Ancestry and Estimating Molecular Relatedness Among 187 Chinese Maize Inbred Lines[J]. Journal of Genetics and Genomics,2007,34(8):738-748.
APA	Chuanxiao Xie.,Shihuang Zhang.,Minshun Li.,Xinhai Li.,Zhuanfang Hao.,...&Yehong Liang.(2007).Inferring Genome Ancestry and Estimating Molecular Relatedness Among 187 Chinese Maize Inbred Lines.Journal of Genetics and Genomics,34(8),738-748.
MLA	Chuanxiao Xie,et al."Inferring Genome Ancestry and Estimating Molecular Relatedness Among 187 Chinese Maize Inbred Lines".Journal of Genetics and Genomics 34.8(2007):738-748.