Rapid diversification rates in Amazonian Chrysobalanaceae inferred from plastid genome phylogenetics

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Chave, Jérôme | Sothers, Cynthia | Iribar, Amaia | Suescun, Uxue | Chase, Mark | Prance, Ghillean

Edité par CCSD ; Linnean Society of London -

International audience. We studied the evolutionary history of Chrysobalanaceae with phylogenetic analyses of complete plastid genomes from 156 species to assess the tempo of diversification in the Neotropics and help to unravel the causes of Amazonian plant diversification. These plastid genomes had a mean length of 162 204 base pairs, and the nearly complete DNA sequence matrix, with reliable fossils, was used to estimate a phylogenetic tree. Chrysobalanaceae diversified from 38.9 Mya (95% highest posterior density, 95% HPD: 34.2-43.9 Mya). A single clade containing almost all Neotropical species arose after a single dispersal event from the Palaeotropics into the Amazonian biome c. 29.

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