Determining the probability of hemiplasy in the presence of incomplete lineage sorting and introgression.

ABSTRACT: The incongruence of character states with phylogenetic relationships is often interpreted as evidence of convergent evolution. However, trait evolution along discordant gene trees can also generate these incongruences - a phenomenon known as hemiplasy. Classic comparative methods do not account for discordance, resulting in incorrect inferences about the number, timing, and direction of trait transitions. Biological sources of discordance include incomplete lineage sorting (ILS) and introgression, but only ILS has received theoretical consideration in the context of hemiplasy. Here, we present a model that shows introgression makes hemiplasy more likely, such that methods that account for ILS alone will be conservative. We also present a method and software (HeIST) for making statis

SUBMITTER: Hibbins MS 

PROVIDER: S-EPMC7800383 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature