The Genetic Architecture of Maize Flowering Time
The Genetic Architecture of Maize Flowering Time
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DOI：
10.1126/science.1174276
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发表时间：
2009-08-07
期刊：
影响因子：
56.9
通讯作者：
McMullen, Michael D.
中科院分区：
文献类型：
--
作者：
Buckler, Edward S.;Holland, James B.;McMullen, Michael D.
开花时间是一个复杂的性状，控制植物适应当地环境的异交种玉米（玉米）。我们解剖了一组5000重组自交系（玉米巢式关联作图群体，NAM）开花时间的变化。在8个环境中检测了近100万株植物，但没有发现任何单一的大效应数量性状位点（QTL）。相反，我们发现了许多小效应QTL的证据，家庭之间共享，然而，等位基因的影响不同的创始人线。我们没有发现个别QTL的等位基因效应是由地理来源或上位性或环境相互作用的大的影响。因此，一个简单的加性模型准确地预测开花时间的玉米，在自交植物物种水稻和拟南芥中观察到的遗传结构。
Flowering time is a complex trait that controls adaptation of plants to their local environment in the outcrossing species Zea mays (maize). We dissected variation for flowering time with a set of 5000 recombinant inbred lines (maize Nested Association Mapping population, NAM). Nearly a million plants were assayed in eight environments but showed no evidence for any single large-effect quantitative trait loci (QTLs). Instead, we identified evidence for numerous small-effect QTLs shared among families; however, allelic effects differ across founder lines. We identified no individual QTLs at which allelic effects are determined by geographic origin or large effects for epistasis or environmental interactions. Thus, a simple additive model accurately predicts flowering time for maize, in contrast to the genetic architecture observed in the selfing plant species rice and Arabidopsis.