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在种子植物和血管精子中,祖先的多重合体性

Yuannian Jiao¹, Norman J Wickett, Saravanaraj Ayyampalayam

¹Intercollege Graduate Degree Program in Plant Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

|April 12, 2011

概括

在大约3.19和1.92亿年前的祖先植物中,全基因组复制 (WGD) 推动了重大创新. 这些事件导致了对种子和花朵发育至关重要的基因的多样化,这有助于种子植物和生苗的成功.

科学领域:

进化生物学是进化的生物学.
基因组学就是基因组学.
植物科学植物科学

背景情况:

全基因组复制 (WGD) 是一个关键的进化机制,特别是在植物中.
以前的证据表明,古老的WGDs早于单动物和动物的分歧是模糊的.
血管精子的成功与基因复制事件有关.

研究的目的:

为了研究植物进化中的古老基因复制事件.
为了在种子植物和生苗的祖先中识别WGD.
了解WGD在植物多样化和创新的作用.

主要方法:

对被测序的植物基因组进行基因组学分析.
分析了超过1260万个表达序列标签序列.
基因复制事件的约会使用分子钟方法.

主要成果:

确定了两个古老的WGD事件,一个在种子植物的共同祖先中,另一个在血管苗的共同祖先中.
约定这些WGD大约在3.19和1.92亿年前.
发现这些WGD集中了基因重复事件,特别是在调节基因中.

结论:

两个主要的WGD事件显著塑造了植物进化.
这些重复发生在种子植物和生苗的多样化之前.
WGDs促进了调节基因的进化,推动了种子和花朵发展的关键创新,并促进了血管苗的统治地位.

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