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

• Published in: Journal of integrative plant biology 2014-03, Vol.56 (3), p.262-270
• Main Authors: Zhang, Hongwei, Uddin, Mohammed Shalim, Zou, Cheng, Xie, Chuanxiao, Xu, Yunbi, Li, Wen‐Xue
• Format: Article
• Language: English
• Subjects: acid phosphatase; Adaptation, Physiological - drug effects; Adaptation, Physiological - genetics; Candidate gene; consensus QTL; corn; cultivars; genes; Genes, Plant; Genetic Association Studies; genome mining; loci; low-phosphorus tolerance; maize; meta-analysis; Meta分析; Phosphorus - pharmacology; QTL; quantitative trait loci; Quantitative Trait Loci - genetics; transporters; Zea mays - drug effects; Zea mays - genetics; Zea mays - physiology; 低磷; 候选基因; 挖掘; 玉米; 紫色酸性磷酸酶; 耐受性
• ISSN: 1672-9072; 1744-7909
• DOI: 10.1111/jipb.12168

Plants with tolerance to low‐phosphorus (P) can grow better under low‐P conditions, and understanding of genetic mechanisms of low‐P tolerance can not only facilitate identifying relevant genes but also help to develop low‐P tolerant cultivars. QTL meta‐analysis was conducted after a comprehensive review of the reports on QTL mapping for low‐P tolerance‐related traits in maize. Meta‐analysis produced 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 low‐P tolerance, including genes encoding miR399s, Pi transporters and purple acid phosphatases. Four cQTL loci (cQTL2‐1, cQTL5‐3, 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.