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干旱是影响玉米产量最重要的因素。对玉米抗旱相关性状数量性状位点(QTL)进行分析有助于阐明玉米抗旱的遗传机制,为高效的抗旱育种提供基础。利用玉米A188×91黄15的139个F2∶3家系,在新疆和北京两年对不同水分条件下的开花相关性状(抽雄天数、吐丝天数、开花天数、开花吐丝间隔期ASI)进行了QTL分析。共检测到26个QTL与水分充足条件下的开花相关性状有关,LOD值在2.62～8.40,解释的表型变异范围为9.1%～43.2%,在第8染色体的bnlg1176标记区域检测到一个QTL控制抽雄、吐丝和开花时间。同时,检测到6个QTL与水分胁迫下的开花相关性状有关,LOD值在2.6～5.6,解释的表型变异范围为9.5%～58.0%,也在bnlg1176标记区域检测到控制抽雄和吐丝的QTL,解释的表型变异分别为16.6%和20.5%。在第8染色体的bnlg1176标记区域共检测到不同年份不同水分条件下控制抽雄、吐丝、开花和ASI的8个QTL,效应值均较高,可以推断这个区域为控制开花性状的重要区域,其标记有辅助选择的应用价值。
Drought is the most important factor affecting maize production. Analyzing the quantitative trait loci (QTLs) of drought-related traits in maize helps to elucidate the genetic mechanism of drought resistance in maize and provide the basis for efficient drought-resistant breeding. Using 139 F2: 3 pedigrees from maize A188 × 91 yellow 15, the flowering-related traits (days of anthesis, silking, flowering and silking interval ASI) under different water conditions in Xinjiang and Beijing QTL analysis. A total of 26 QTLs were detected for flowering-related traits under well-watered condition with LOD values ranging from 2.62 to 8.40 and explained a phenotypic variation range from 9.1% to 43.2%. A QTL control was detected on the bnlg1176 marker region on chromosome 8 Tasse, silking and flowering time. At the same time, 6 QTLs were detected related to the flowering-related traits under water stress. The LOD values ranged from 2.6 to 5.6 and explained the phenotypic variation ranged from 9.5% to 58.0%. The QTLs controlling tasseling and silking were also detected in the bnlg1176 marker region QTL, explained the phenotypic variation of 16.6% and 20.5% respectively. Eight QTLs controlling tasseling, silking, flowering and ASI were detected in bnlg1176 marker region on chromosome 8 with high effect values, which could be inferred to be important regions for controlling flowering traits. Marked the value of ancillary options.