title: Genome-wide Association Mapping of Quantitative Trait Loci (QTLs) for Contents of Eight Elements in Brown Rice (Oryza sativa L.).
abstract: An association mapping of quantitative trait loci (QTLs) regulating the concentrations of eight elements in brown rice (Oryza sativa L.) was performed using USDA mini-core subset cultivated in two different environments. In addition, correlation between the grain elemental concentrations was also studied. A total of 60 marker loci associated with 8 grain elemental concentrations were identified, and these loci were clustered into 37 genomic regions. Twenty new QTLs were found to be associated with important elements such as Zn, Fe, and P, along with others. Fe concentration was associated with the greatest number of markers in two environments. In addition, several important elemental/metal transporter genes were identified in a few mapped regions. Positive correlation was observed within all grain elemental concentrations. In summary, the results provide insight into the genetic basis of rice grain element accumulation and may help in the identification of genes associated with the accumulation of Zn, Fe, and other essential elements in rice.
authors: State Key Laboratory of Rice Biology, Institute of Crop Science, Zhejiang University , Hangzhou 310029, China.
authors: Zarqa
authors: Z
authors: Nawaz
authors: State Key Laboratory of Rice Biology, Institute of Crop Science, Zhejiang University , Hangzhou 310029, China.
authors: Kaleem U
authors: KU
authors: Kakar
authors: Institute of Horticultural Science, Zhejiang Academy of Agricultural Sciences , Hangzhou 310021, China.
authors: Xiao-bai
authors: XB
authors: Li
authors: State Key Laboratory of Rice Biology, Institute of Crop Science, Zhejiang University , Hangzhou 310029, China.
authors: Shan
authors: S
authors: Li
authors: Zhejiang Zhijiang Seed Company , Yuhang, Hangzhou 311107, China.
authors: Bin
authors: B
authors: Zhang
authors: State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University , Hangzhou 310058, China.
authors: Hui-xia
authors: HX
authors: Shou
authors: State Key Laboratory of Rice Biology, Institute of Crop Science, Zhejiang University , Hangzhou 310029, China.|Hubei Collaborative Innovation Center for Grain Industry , Jingzhou 434025, China.
authors: Qing-yao
authors: QY
authors: Shu
mesh_terms: D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D018745:Genome, Plant; D055106:Genome-Wide Association Study; D012275:Oryza / Q000737:chemistry / Q000235:genetics*; D040641:Quantitative Trait Loci; D012639:Seeds / Q000737:chemistry / Q000235:genetics
keywords: USDA Mini-Core Rice Collection; association mapping; grain element concentration; molecular markers