Abstract:Chromosome number change is a driver of speciation in eukaryotic organisms. Carnivorous sundews, the plant genus Drosera L., exhibit single chromosome number variation among and within species, especially in the Australian Drosera subg. Ergaleium D.C., potentially linked to the presence of holocentromeres. We reviewed literature, verified chromosome counts, and using an rbcL chronogram, tested alternate models where the gain, loss, and doubling rates (+1, −1, ×2) were the same or different between D. subg. Erg… Show more
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