Polyploidy and genome evolution in plants
Polyploidy and genome evolution in plants
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DOI：
10.1016/j.gde.2015.11.003
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发表时间：
2015-12-01
影响因子：
4
通讯作者：
Soltis, Douglas E.
中科院分区：
文献类型：
--
作者：
Soltis, Pamela S.;Marchant, D. Blaine;Soltis, Douglas E.
植物基因组的大小和复杂性各不相同，部分原因是全基因组复制（WGD;多倍性）和随后的基因组进化过程。尽管在被子植物的进化史中WGD反复发生，但基因组并不是均匀的大，即使是基因组非常小的植物也带有古老复制事件的特征。在这些古老事件之后，植物基因组的进化过程在很大程度上是未知的。在这里，我们认为二倍体化的机制，在最近形成的多倍体物种的基因组重组的证据，和植物基因组中WGD的宏观进化模式，并提出正在进行的基因组变化观察到最近的多倍体可能说明二倍体化过程中，导致在地质时间尺度上的WGD的古老签名。
Plant genomes vary in size and complexity, fueled in part by processes of whole-genome duplication (WGD; polyploidy) and subsequent genome evolution. Despite repeated episodes of WGD throughout the evolutionary history of angiosperms in particular, the genomes are not uniformly large, and even plants with very small genomes carry the signatures of ancient duplication events. The processes governing the evolution of plant genomes following these ancient events are largely unknown. Here, we consider mechanisms of diploidization, evidence of genome reorganization in recently formed polyploid species, and macroevolutionary patterns of WGD in plant genomes and propose that the ongoing genomic changes observed in recent polyploids may illustrate the diploidization processes that result in ancient signatures of WGD over geological timescales.