Nuclear phylogenomics of grasses (Poaceae) supports current classification and reveals repeated reticulation
Author:
, Arthan WatcharaORCID, Baker William J.ORCID, Barrett Matthew D.ORCID, Barrett Russell L.ORCID, Bennetzen JeffreyORCID, Besnard GuillaumeORCID, Bianconi Matheus E.ORCID, Birch Joanne L.ORCID, Catalán PilarORCID, Chen WenliORCID, Christenhusz Maarten, Christin Pascal-AntoineORCID, Clark Lynn G.ORCID, Columbus J. TravisORCID, Couch CharlotteORCID, Crayn Darren M.ORCID, Davidse Gerrit, Dransfield Soejatmi, Dunning Luke T.ORCID, Duvall Melvin R.ORCID, Ficinski Sarah Z., Fisher Amanda E.ORCID, Fjellheim SiriORCID, Forest FelixORCID, Gillespie Lynn J.ORCID, Hackel JanORCID, Haevermans ThomasORCID, Hodkinson Trevor R.ORCID, Huang Chien-Hsun, Huang Weichen, Humphreys Aelys M.ORCID, Jobson Richard W., Kayombo Canisius J., Kellogg Elizabeth A.ORCID, Kimeu John M.ORCID, Larridon IsabelORCID, Letsara Rokiman, Li De-ZhuORCID, Liu Jing-Xia, Londoño Ximena, Luke Quentin W.R., Ma HongORCID, Macfarlane Terry D.ORCID, Maurin OlivierORCID, McKain Michael R.ORCID, McLay Todd G.B., Moreno-Aguilar Maria FernandaORCID, Murphy Daniel J.ORCID, Nanjarisoa Olinirina P., Onjalalaina Guy E.ORCID, Peterson Paul M.ORCID, Rakotonasolo Rivontsoa A., Razanatsoa Jacqueline, Saarela Jeffery M.ORCID, Simpson Lalita, Snow Neil W., Soreng Robert J.ORCID, Sosef MarcORCID, Thompson John J.E.ORCID, Traiperm Paweena, Verboom G. AnthonyORCID, Vorontsova Maria S.ORCID, Walsh Neville G.ORCID, Washburn Jacob D.ORCID, Watcharamongkol TeeraORCID, Waycott MichelleORCID, Welker Cassiano A.D.ORCID, Xanthos Martin D.ORCID, Xia NianheORCID, Zhang LinORCID, Zizka AlexanderORCID, Zuloaga Fernando O., Zuntini Alexandre R.ORCID
Abstract
SummaryGrasses (Poaceae) comprise around 11,800 species and are central for human livelihoods and terrestrial ecosystems. Knowing their relationships and evolutionary history is key to comparative research and crop breeding. Advances in genome-scale sequencing allow for increased breadth and depth of phylogenomic analyses, making it possible to infer a new reference species tree of the family.We inferred a comprehensive species tree of grasses by combining new and published sequences for 331 nuclear genes from genome, transcriptome, target enrichment and shotgun data. Our 1,153-tip tree covers 79% of grass genera (including 21 genera sequenced for the first time) and all but two small tribes. We compared it to a 910-tip plastome tree.The nuclear phylogeny matches that of the plastome at most deep branches, with only a few instances of incongruence. Gene tree–species tree reconciliation suggests that reticulation events occurred repeatedly in the history of grasses.We provide a robust framework for the grass tree of life to support research on grass evolution, including modes of reticulation, and genetic diversity for sustainable agriculture.
Publisher
Cold Spring Harbor Laboratory
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