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A fully resolved backbone phylogeny reveals numerous dispersals and explosive diversifications throughout the history of Asteraceae

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dc.contributor.author Mandel, Jennifer R. en
dc.contributor.author Dikow, Rebecca B. en
dc.contributor.author Siniscalchi, Carolina M. en
dc.contributor.author Thapa, Ramhari en
dc.contributor.author Watson, Linda E. en
dc.contributor.author Funk, Vicki A. en
dc.date.accessioned 2019-07-02T13:33:05Z
dc.date.available 2019-07-02T13:33:05Z
dc.date.issued 2019
dc.identifier.citation Mandel, Jennifer R., Dikow, Rebecca B., Siniscalchi, Carolina M., Thapa, Ramhari, Watson, Linda E., and Funk, Vicki A. 2019. "<a href="https://www.pnas.org/content/pnas/116/28/14083.full.pdf">A fully resolved backbone phylogeny reveals numerous dispersals and explosive diversifications throughout the history of Asteraceae</a>." <em>Proceedings of the National Academy of Sciences of the United States of America</em>. 116 (28):14083&ndash;14088. <a href="https://doi.org/10.1073/pnas.1903871116">https://doi.org/10.1073/pnas.1903871116</a> en
dc.identifier.issn 0027-8424
dc.identifier.uri https://hdl.handle.net/10088/98114
dc.description.abstract The sunflower family, Asteraceae, comprises 10% of all flowering plant species and displays an incredible diversity of form. Asteraceae are clearly monophyletic, yet resolving phylogenetic relationships within the family has proven difficult, hindering our ability to understand its origin and diversification. Recent molecular clock dating has suggested a Cretaceous origin, but the lack of deep sampling of many genes and representative taxa from across the family has impeded the resolution of migration routes and diversifications that led to its global distribution and tremendous diversity. Here we use genomic data from 256 terminals to estimate evolutionary relationships, timing of diversification(s), and biogeographic patterns. Our study places the origin of Asteraceae at ~83 MYA in the late Cretaceous and reveals that the family underwent a series of explosive radiations during the Eocene which were accompanied by accelerations in diversification rates. The lineages that gave rise to nearly 95% of extant species originated and began diversifying during the middle Eocene, coincident with the ensuing marked cooling during this period. Phylogenetic and biogeographic analyses support a South American origin of the family with subsequent dispersals into North America and then to Asia and Africa, later followed by multiple worldwide dispersals in many directions. The rapid mid-Eocene diversification is aligned with the biogeographic range shift to Africa where many of the modern-day tribes appear to have originated. Our robust phylogeny provides a framework for future studies aimed at understanding the role of the macroevolutionary patterns and processes that generated the enormous species diversity of Asteraceae. en
dc.relation.ispartof Proceedings of the National Academy of Sciences of the United States of America en
dc.title A fully resolved backbone phylogeny reveals numerous dispersals and explosive diversifications throughout the history of Asteraceae en
dc.type Journal Article en
dc.identifier.srbnumber 151604
dc.identifier.doi 10.1073/pnas.1903871116
rft.jtitle Proceedings of the National Academy of Sciences of the United States of America
rft.volume 116
rft.issue 28
rft.spage 14083
rft.epage 14088
dc.description.SIUnit NH-Botany en
dc.description.SIUnit NMNH en
dc.description.SIUnit OCIO en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 14083
dc.citation.epage 14088
dc.relation.url https://www.pnas.org/content/pnas/116/28/14083.full.pdf


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