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Size is not everything : rates of genome size evolution, not C-value, correlate with speciation in angiosperms [Royal Society Open Science]

Keywords : angiosperms, genome size, evolvability, polyploidy, genome duplication

par Frédéric Magné - publié le

Angiosperms represent one of the key examples of evolutionary success, and their diversity dwarfs other land plants ; this success has been linked, in part, to genome size and phenomena such as whole genome duplication events. However, while angiosperms exhibit a remarkable breadth of genome size, evidence linking overall genome size to diversity is equivocal, at best. Here, we show that the rates of speciation and genome size evolution are tightly correlated across land plants, and angiosperms show the highest rates for both, whereas very slow rates are seen in their comparatively species-poor sister group, the gymnosperms.(...)

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