Meta‐analysis and candidate gene mining of low‐phosphorus tolerance in maize  

作　　者：Hongwei Zhang Mohammed Shalim Uddin Cheng Zou Chuanxiao Xie Yunbi Xu Wen‐Xue Li 

机构地区：[1]Institute of Crop Science, National Key Facility of Crop Gene Resources and Genetic Improvement, the Chinese Academy of Agricultural Sciences [2]Bangladesh Agricultural Research Institute (BARI) [3]International Maize and Wheat Improvement Center (CIMMYT)

出　　处：《Journal of Integrative Plant Biology》2014年第3期262-270,共9页植物学报（英文版）

基　　金：supported by the National High‐Tech R&D Program (2012AA10A306) to W.X.L.;National International Science and Technology Collaboration Program of China (2011DFA31140, 2012DFA32290) to Y.B.X.;China Postdoctoral Science Foundation funded project to H.W.Z. (2012M520474)

摘　　要：Plants with tolerance to low-phosphorus （P） can grow better under Iow-P conditions, and understanding of genetic mechanisms of Iow-P tolerance can not only facilitate identifying relevant genes but also help to develop Iow-P tolerant cultivars. QTL meta-analysis was conducted after a comprehensive review of the reports on O, TL mapping for Iow-P tolerance-related traits in maize. Meta-analysis pro- duced 23 consensus QTL （cQTL）, 17 of which located in similar chromosome regions to those previously reported to influence root traits. Meanwhile, candidate gene mining yielded 215 genes, 22 of which located in the cQTL regions. These 22 genes are homologous to 14 functionally characterized genes that were found to participate in plant Iow-P tolerance, including genes encoding miR399s, Pi transporters and purple acid phosphatases. Four cQTL loci （cQTL2-L cQTLS-3, cQTL6-2, and cQTL10-2） may play important roles for low-P tolerance because each contains more original QTL and has better consistency across previous reports.Plants with tolerance to low-phosphorus （P） can grow better under Iow-P conditions, and understanding of genetic mechanisms of Iow-P tolerance can not only facilitate identifying relevant genes but also help to develop Iow-P tolerant cultivars. QTL meta-analysis was conducted after a comprehensive review of the reports on O, TL mapping for Iow-P tolerance-related traits in maize. Meta-analysis pro- duced 23 consensus QTL （cQTL）, 17 of which located in similar chromosome regions to those previously reported to influence root traits. Meanwhile, candidate gene mining yielded 215 genes, 22 of which located in the cQTL regions. These 22 genes are homologous to 14 functionally characterized genes that were found to participate in plant Iow-P tolerance, including genes encoding miR399s, Pi transporters and purple acid phosphatases. Four cQTL loci （cQTL2-L cQTLS-3, cQTL6-2, and cQTL10-2） may play important roles for low-P tolerance because each contains more original QTL and has better consistency across previous reports.

关 键 词：Candidate gene consensus QTL low-phosphorustolerance MAIZE meta-analysis 

分 类 号：S513[农业科学—作物学]