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原文連結
論文資訊
- 類型：已發表論文
- 日期：2014-08-18
摘要
Polyploidy, or whole 基因組 duplication, has been an important feature of eukaryotic 演化. This is especially true in flowering plants, where all extant angiosperms have descended from polyploid 物種. Here we present a broad comparative analysis of the effect of polyploidy on flowering plant 多樣性. We examine the widely held hypothesis that polyploid flowering plants generate more 多樣性 than their diploid counterparts, by fitting 隨機 birth/death models to observed ploidal frequency data from 60 extant angiosperm genera. Our results suggest the opposite, that diploids speciate at higher rates than polyploids, through a combination of simple diploid speciation and tetraploidy. Importantly, the estimated diploid advantage stemmed primarily from a higher rate of polyploidization in diploids than polyploid
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