Department of Plant Systems Biology, Flanders Institute for Biotechnology (VIB), 9052 Gent, Belgium.
Trends Plant Sci. 2009 Dec;14(12):680-8. doi: 10.1016/j.tplants.2009.09.001. Epub 2009 Oct 7.
Flowering plants contain many genes, most of which were created during the past 200 or so million years through small- and large-scale duplications. Paleo-polyploidy events, in particular, have been the subject of much recent research. There is a growing consensus that one or more genome doubling or merging events occurred early during the evolution of the flowering plants, and that many lineages have since undergone additional, independent and more recent duplication events. Here, we review the difficulties in determining the number of genome duplications and discuss how the completion of some additional genome sequences of species occupying key phylogenetic positions has led to a better understanding of the timing of certain duplication events. This is important if we want to demonstrate the significance of genome duplications for the evolution and radiation of (different groups of) flowering plants.
开花植物含有许多基因，其中大部分是在过去大约 2 亿年左右通过小范围和大范围的重复产生的。古多倍体事件，特别是，是最近研究的主题。越来越多的共识认为，在开花植物的进化过程中，发生了一次或多次基因组加倍或合并事件，此后许多谱系又经历了额外的、独立的和更近的重复事件。在这里，我们回顾了确定基因组重复次数的困难，并讨论了完成一些处于关键系统发育位置的物种的其他基因组序列如何导致对某些重复事件时间的更好理解。如果我们要证明基因组重复对（不同类群的）开花植物的进化和辐射的重要性，这一点很重要。
