Incomplete lineage sorting and phenotypic evolution in marsupials
Incomplete lineage sorting (ILS) makes ancestral genetic polymorphisms persist during rapid speciation events, inducing incongruences between gene trees and species trees. ILS has complicated phylogenetic inference in many lineages, including hominids. However, we lack empirical evidence that ILS le...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | Colombia |
| Institución: | Universidad de Ibagué |
| Repositorio: | Repositorio Universidad de Ibagué |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unibague.edu.co:20.500.12313/3840 |
| Acceso en línea: | https://hdl.handle.net/20.500.12313/3840 |
| Access Level: | acceso abierto |
| Palabra clave: | Phylogenetic inference Rapid speciation Gene-phenotype incongruence Hemiplasy Incomplete lineage sorting CoalHMM Marsupial Monito del monte Trait evolution Biogeography |
| Sumario: | Incomplete lineage sorting (ILS) makes ancestral genetic polymorphisms persist during rapid speciation events, inducing incongruences between gene trees and species trees. ILS has complicated phylogenetic inference in many lineages, including hominids. However, we lack empirical evidence that ILS leads to incongruent phenotypic variation. Here, we performed phylogenomic analyses to show that the South American monito del monte is the sister lineage of all Australian marsupials, although over 31% of its genome is closer to the Diprotodontia than to other Australian groups due to ILS during ancient radiation. Pervasive conflicting phylogenetic signals across the whole genome are consistent with some of the morphological variation among extant marsupials. We detected hundreds of genes that experienced stochastic fixation during ILS, encoding the same amino acids in non-sister species. Using functional experiments, we confirm how ILS may have directly contributed to hemiplasy in morphological traits that were established during rapid marsupial speciation ca. 60 mya. |
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