Genetic divergence causes parallel evolution of flower color in Chilean Mimulus
Genetic divergence causes parallel evolution of flower color in Chilean Mimulus
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DOI：
10.1111/j.1469-8137.2009.02858.x
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发表时间：
2009-01-01
期刊：
影响因子：
9.4
通讯作者：
Willis, John H.
中科院分区：
文献类型：
--
作者：
Cooley, Arielle M.;Willis, John H.
P>破译表型变化的遗传结构为理解进化在遗传水平上如何进行提供了一个框架，并为分子水平上的工作铺平了道路。一系列的种内和种间杂交被用来研究智利中部一组密切相关的酸浆菌物种最近进化的花色素沉着表型的遗传控制。发现种内多态性是由单个孟德尔基因座控制的。相比之下，物种之间的差异由多个独立的模式元素组成，包括孟德尔性状和多基因性状。该组中最引人注目的表型新颖性是花瓣叶中的花青素色素沉着，已经独立进化了三次。结果说明了遗传上简单的模块元件如何与多基因或数量性状相互作用，以创造复杂的新表型。花瓣叶花青素的重复进化表明自然选择可能在智利酸浆菌红色进化中发挥了作用，并表明这些密切相关的物种通过不同的遗传途径实现了红色。 New Phytological (2009) 183: 729-739doi: 10.1111/j.1469-8137.2009.02858.x。
P>Deciphering the genetic architecture of phenotypic change provides a framework for understanding how evolution proceeds at a genetic level, and paves the way for work at the molecular level.A series of intra- and interspecific crosses were used to investigate the genetic control of recently evolved floral pigmentation phenotypes in a group of closely related Mimulus species from central Chile.An intraspecific polymorphism was found to be controlled by a single Mendelian locus. Differences between species, by contrast, were composed of multiple independent patterning elements, including both Mendelian and polygenic traits. The most striking phenotypic novelty in this group, anthocyanin pigmentation in the petal lobes, has evolved three times independently.The results illustrate how genetically simple modular elements can interact with polygenic or quantitative traits to create complex new phenotypes. The repeated evolution of petal lobe anthocyanins suggests that natural selection may have played a role in the evolution of red coloration in the Chilean Mimulus, and shows that red coloration has been achieved via different genetic pathways in these closely related species.New Phytologist (2009) 183: 729-739doi: 10.1111/j.1469-8137.2009.02858.x.