[关键词]
[摘要]
以240个DH系为作图群体,利用SNP芯片对DH群体进行基因型分析,构建连锁图谱,对DH群体进行容重性状鉴定。结果表明,采用复合区间作图法进行QTL定位分析,在4个环境下共检测到5个控制玉米容重的QTL,联合贡献率为23.61%;位于第1染色体的qTw1-1介于SNP标记PZE-101032246与SYN13192之间,位于第9染色体的qTw9-1介于SNP标记PZE-109011840和SYN6085之间,分别解释11.9%和7.8%的表型变异,表明这些区域可能包含调控玉米容重性状关键基因。
[Key word]
[Abstract]
A mapping population consisting of 240 DH lineswas constructed, and significant genotypic variation for maize test weight was observed in 4 environments. Based on the genetic map containing, QTL for maize test weight were detected by composite interval mapping. Five QTLs were identified, and together explained 23.61% of the phenotypic variation. qTw1-1 was detected on chromosome 1, locating in SNP of interval PZE-101032246-SYN13192, qTw9-1 was detected in SNP of interval PZE-109011840-SYN6085 on chromosome 9, with explained 11.9% and 7.8% of the phenotypic variation respectively. The results showed that some key genes for test weight were possibly contained in these regions.
[中图分类号]
[基金项目]
国家科技支撑项目(2011BAD35B09,2014BAD01B09)、北京市农林科学院科技创新能力建设专项(KJCX20140202)、"863"计划" 玉米产量功能基因研究与克隆"(2012AA10A305)