小麦开花期QTL分析  

QTL Mapping for Flowering Time in Wheat

作　　者：闫雪[1] 史雨刚[1] 李晓宇[1] 王曙光[1] 孙黛珍[1] 

机构地区：[1]山西农业大学农学院,山西太谷030801

出　　处：《山西农业科学》2015年第8期919-921,950,共4页Journal of Shanxi Agricultural Sciences

基　　金：国家转基因生物新品种培育科技重大专项(2014ZX0800203B-003);教育部博士点基金项目(20121403110005);山西省自然科学基金项目(2013011034-2;2014011004-3)

摘　　要：开花期是衡量小麦成熟期的重要指标,对其进行QTL定位并分析其遗传效应,对小麦品种熟期改良至关重要。以旱选10号×鲁麦14构建的包含有150个家系的DH群体为材料,在正常灌溉和干旱胁迫条件下对开花期进行QTL定位,结果表明,共检测到4个加性QTL位点和4对上位性QTL位点,其中,2种水分条件下在1D染色体上标记WMC222附近检测到的开花期QTL与先前利用相同群体检测到的抽穗期QHd-1D-1位于相同标记区间,且加性效应方向相同,表明该QTL与小麦成熟期相关,且稳定表达,可以用于辅助选择育种。Flowering time is an important stage of wheat mature, thus, QTL mapping of flowering time is essential to improving ma- ture period of wheat. The objective of this study was to make a QTL analysis for flowering time using a population of 150 DH lines derived from Hanxuan 10 × Lumai 14 under well-watered and drought-stress conditions. The results showed that four additive effect QTLs and four pairs of epistatic effect QTLs were identified. Among them, a QTL for flowering time located in near marker WMC222 on chromosome 1D was simultaneously detected under the two water regimes. QHd-ID-1 controlled heading was also located in the same flanking mark- er using the same population, and they were contributed by the male parent. It suggested that the QTL might have a close relationship with mature stage of wheat. So it could be used in molecular marker assisted selection.

关 键 词：小麦 DH群体 开花期 QTL 

分 类 号：S512.1[农业科学—作物学]