Genomic insights into rapid speciation within the world's largest tree genus Syzygium.

Genetic Speciation Genomics Phylogeny Syzygium / genetics Trees

Journal

Nature communications

ISSN: 2041-1723

Titre abrégé: Nat Commun

Pays: England

ID NLM: 101528555

Informations de publication

Date de publication:
12 09 2022

Historique:

received: 14 10 2021

accepted: 10 08 2022

entrez: 12 9 2022

pubmed: 13 9 2022

medline: 15 9 2022

Statut: epublish

Résumé

Species radiations, despite immense phenotypic variation, can be difficult to resolve phylogenetically when genetic change poorly matches the rapidity of diversification. Genomic potential furnished by palaeopolyploidy, and relative roles for adaptation, random drift and hybridisation in the apportionment of genetic variation, remain poorly understood factors. Here, we study these aspects in a model radiation, Syzygium, the most species-rich tree genus worldwide. Genomes of 182 distinct species and 58 unidentified taxa are compared against a chromosome-level reference genome of the sea apple, Syzygium grande. We show that while Syzygium shares an ancient genome doubling event with other Myrtales, little evidence exists for recent polyploidy events. Phylogenomics confirms that Syzygium originated in Australia-New Guinea and diversified in multiple migrations, eastward to the Pacific and westward to India and Africa, in bursts of speciation visible as poorly resolved branches on phylogenies. Furthermore, some sublineages demonstrate genomic clines that recapitulate cladogenetic events, suggesting that stepwise geographic speciation, a neutral process, has been important in Syzygium diversification.

Identifiants

DOI: 10.1038/s41467-022-32637-x PMID: 36097018 PMC: PMC9468008

pubmed: 36097018

doi: 10.1038/s41467-022-32637-x

pii: 10.1038/s41467-022-32637-x

pmc: PMC9468008

doi:

Banques de données

Dryad

['10.5061/dryad.h18931zpw']

Types de publication

Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Langues

eng

Sous-ensembles de citation

Pagination

5031

Informations de copyright

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