A gain-of-function polymorphism controlling complex traits and fitness in nature.

A gain-of-function polymorphism controlling complex traits and fitness in nature.
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DOI:
10.1126/science.1221636
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发表时间:
2012-08-31
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Mitchell-Olds T
Mitchell-Olds T
中科院分区:
其他
文献类型:
--
作者:
Prasad KV;Song BH;Olson-Manning C;Anderson JT;Lee CR;Schranz ME;Windsor AJ;Clauss MJ;Manzaneda AJ;Naqvi I;Reichelt M;Gershenzon J;Rupasinghe SG;Schuler MA;Mitchell-Olds T

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确定控制复杂性状变异的因果基因仍然具有挑战性,限制了我们对影响自然界多态性的进化过程的认识。我们克隆了一个QTL,该QTL控制植物的防御化学,昆虫食草动物的伤害,在这种多态性进化的自然环境中生存和繁殖。这些生态效应是由控制该QTL的BCMA位点的重复和它们编码的硫代葡萄糖苷生物合成p450中两个选择性有利的氨基酸变化驱动的。这些变化导致新的酶功能的获得,由等位基因在催化速率和基因拷贝数上的差异调节。不同环境中的生态相互作用可能导致这种生化功能的广泛多态性。
Identifying the causal genes that control complex trait variation remains challenging, limiting our appreciation of the evolutionary processes that influence polymorphisms in nature. We cloned a QTL that controls plant defensive chemistry, damage by insect herbivores, survival, and reproduction in the natural environments where this polymorphism evolved. These ecological effects are driven by duplications in the BCMA loci controlling this QTL and by two selectively favored amino acid changes in the glucosinolate-biosynthetic P450s that they encode. These changes cause a gain of novel enzyme function, modulated by allelic differences in catalytic rate and gene copy number. Ecological interactions in diverse environments likely contribute to the widespread polymorphism of this biochemical function.
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