Has the Polyploid Wave Ebbed?
| Autor: | Donald A. Levin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine reproductive isolation Lineage (evolution) genetic processes diversification lag Plant Science lcsh:Plant culture Biology 010603 evolutionary biology 01 natural sciences dysploidy 03 medical and health sciences Polyploid Long period Genetic algorithm lcsh:SB1-1110 polyploidy divergent evolution Extinction extinction fungi food and beverages pathological conditions signs and symptoms Reproductive isolation Divergent evolution 030104 developmental biology Evolutionary biology Perspective Ploidy |
| Zdroj: | Frontiers in Plant Science, Vol 11 (2020) Frontiers in Plant Science |
| ISSN: | 1664-462X |
| Popis: | There was a wave of whole genome duplications (WGD) during and subsequent to the K-Pg interface, which was followed by an increase in the proportion of species that were polyploid. I consider why this wave of polyploid speciation has continued to rise through the divergent evolution of polyploid lineages, and through rounds of homoploid and heteroploid chromosomal change. I also consider why the polyploid speciation wave is likely to rise in the next millennium. I propose that the speed of polyploid genesis through ploidal increase and through diversification among polyploids likely will be greater than the speed of diploid speciation. The increase in polyploid diversity is expected to lag well behind episodes of WGD, owing to the very long period required for species diversification either by lineage splitting or additional rounds of polyploidy, in addition to the long period of genomic adjustment to higher ploidal levels in neopolyploids. |
| Databáze: | OpenAIRE |
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