QTL meta-analysis of root traits in Brassica napus under contrasting phosphorus supply in two growth systems
文献类型： 外文期刊
第一作者： Zhang, Ying
作者： Zhang, Ying;Xiang, Jinxia;Long, Yan;Wang, Xiaohua;Zou, Jun;Luo, Ziliang;Ding, Guangda;King, Graham J.;Xu, Fangsen;Shi, Lei;Meng, Jinling;Zhang, Ying;Xiang, Jinxia;Long, Yan;Wang, Xiaohua;Zou, Jun;Luo, Ziliang;Ding, Guangda;King, Graham J.;Xu, Fangsen;Shi, Lei;Meng, Jinling;Zhang, Ying;Xiang, Jinxia;Wang, Xiaohua;Ding, Guangda;Cai, Hongmei;Xu, Fangsen;Shi, Lei;Thomas, Catherine L.;Graham, Neil S.;King, Graham J.;Broadley, Martin R.;Long, Yan;Hammond, John P.;Hammond, John P.;King, Graham J.;White, Philip J.;White, Philip J.
作者机构：
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2016 年 6 卷
页码：
收录情况： SCI
摘要： A high-density SNP-based genetic linkage map was constructed and integrated with a previous map in the Tapidor x Ningyou7 (TNDH) Brassica napus population, giving a new map with a total of 2041 molecular markers and an average marker density which increased from 0.39 to 0.97 (0.82 SNP bin) per cM. Root and shoot traits were screened under low and 'normal' phosphate (Pi) supply using a 'pouch and wick' system, and had been screened previously in an agar based system. The P-efficient parent Ningyou7 had a shorter primary root length (PRL), greater lateral root density (LRD) and a greater shoot biomass than the P-inefficient parent Tapidor under both treatments and growth systems. Quantitative trait loci (QTL) analysis identified a total of 131 QTL, and QTL meta-analysis found four integrated QTL across the growth systems. Integration reduced the confidence interval by similar to 41%. QTL for root and shoot biomass were co-located on chromosome A3 and for lateral root emergence were co-located on chromosomes A4/C4 and C8/C9. There was a major QTL for LRD on chromosome C9 explaining similar to 18% of the phenotypic variation. QTL underlying an increased LRD may be a useful breeding target for P uptake efficiency in Brassica.
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