Quantitative trait loci controlling leaf and tassel traits in a B73 x MO17 population of maize
Quantitative trait loci controlling leaf and tassel traits in a B73 x MO17 population of maize
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DOI：
10.2135/cropsci2002.1902
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发表时间：
2002-11-01
期刊：
影响因子：
2.3
通讯作者：
Kaeppler, SM
中科院分区：
文献类型：
--
作者：
Mickelson, SM;Stuber, CS;Kaeppler, SM
光穿透玉米（Zea mays L.）生产田的冠层是谷物产量的重要决定因素。影响光穿透的因素包括农业实践（例如种植密度）和植物形态因素（例如叶角、叶子大小和雄穗大小）。本实验的目的是确定 B73 X Mo17 重组近交群体中控制叶角和雄穗形态遗传的基因组区域。检测到3个雄穗分枝角度数量性状位点（QTL），解释了35.6%的表型变异。检测到 6 个与雄穗分枝数相关的 QTL，其中 3 个 QTL 位于 2 号染色体上。在一种或多种环境中检测到 9 个与叶角度有关的 QTL。在雄穗分枝角度和雄穗分枝数量之间以及雄穗分枝数量和叶角度之间检测到显着的表型相关性。在标记 umc53a 附近的 2 号染色体上检测到的叶角和雄穗分支数的 QTL 之间确定了重叠的支持区间。另外，在5号染色体上鉴定为雄穗分枝角度的标记bnl6.10附近的QTL与鉴定为叶角度的QTL位于同一区域。本研究结果表明，雄穗性状与叶角之间存在共同的遗传关系。
Light penetration into the canopy of maize (Zea mays L.) production fields is an important determinant of grain yield. Factors affecting light penetration include agricultural practices such as planting density and plant morphological factors such as leaf angle, leaf size, and tassel size. The objectives of this experiment were to identify genomic regions controlling the inheritance of leaf angle and tassel morphology in a B73 X Mo17 recombinant inbred population. Three quantitative trait loci (QTL) for tassel branch angle were detected which explained 35.6% of the phenotypic variation. Six QTL were detected for tassel branch number with three of these QTL on chromosome 2. Nine QTL were detected for leaf angle in one or more environments. Significant phenotypic correlations were detected between tassel branch angle and tassel branch number and between tassel branch number and leaf angle. Overlapping support intervals were identified between QTL detected for leaf angle and for tassel branch number on chromosome 2 near marker umc53a. Additionally, a QTL near marker bnl6.10 on chromosome 5 identified for tassel branch angle was in the same region as a QTL identified for leaf angle. The results of this study indicate that common genetic relationships exist between tassel traits and leaf angle.