COUNTER-ARGUMENTS. “There have also been oppositions to the hypothesis that polyploidy events contribute to diversification. There have been plants (angiosperms, ferns, etc.) that have no evidence of increasing speciation due to polyploidization. It has also been suggested that polyploid lineages will have lower speciation rates that contribute to higher extinction rates in comparison to diploid lineages.”
https://lnkd.in/etn6Uea