Incomplete lineage sorting and phenotypic evolution in marsupials

Shaohong Feng, Ming Bai, Iker Rivas-González, Cai Li, Shiping Liu, Yijie Tong, Haidong Yang, Guangji Chen, Duo Xie, Karen E. Sears, Lida M. Franco, Juan Diego Gaitan-Espitia, Roberto F. Nespolo, Warren E. Johnson, Huanming Yang, Parice A. Brandies, Carolyn J. Hogg, Katherine Belov, Marilyn B. Renfree, Kristofer M. HelgenJacobus J. Boomsma, Mikkel Heide Schierup, Guojie Zhang*

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review


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.

Sider (fra-til)1646-1660.e18
Antal sider15
StatusUdgivet - maj 2022


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