Genomic insights into rapid speciation within the world’s largest tree genus Syzygium
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Published:2022-09-12
Issue:1
Volume:13
Page:
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ISSN:2041-1723
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Container-title:Nature Communications
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language:en
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Short-container-title:Nat Commun
Author:
Low Yee WenORCID, Rajaraman SitaramORCID, Tomlin Crystal M., Ahmad Joffre Ali, Ardi Wisnu H., Armstrong KateORCID, Athen Parusuraman, Berhaman Ahmad, Bone Ruth E., Cheek Martin, Cho Nicholas R. W., Choo Le Min, Cowie Ian D., Crayn DarrenORCID, Fleck Steven J., Ford Andrew J., Forster Paul I., Girmansyah DedenORCID, Goyder David J.ORCID, Gray Bruce, Heatubun Charlie D., Ibrahim Ali, Ibrahim Bazilah, Jayasinghe Himesh D.ORCID, Kalat Muhammad Ariffin, Kathriarachchi Hashendra S., Kintamani EndangORCID, Koh Sin Lan, Lai Joseph T. K., Lee Serena M. L., Leong Paul K. F., Lim Wei Hao, Lum Shawn K. Y., Mahyuni Ridha, McDonald William J. F., Metali Faizah, Mustaqim Wendy A.ORCID, Naiki AkiyoORCID, Ngo Kang Min, Niissalo Matti, Ranasinghe Subhani, Repin Rimi, Rustiami Himmah, Simbiak Victor I., Sukri Rahayu S., Sunarti Siti, Trethowan Liam A., Trias-Blasi Anna, Vasconcelos Thais N. C., Wanma Jimmy F., Widodo Pudji, Wijesundara Douglas Siril A.ORCID, Worboys StuartORCID, Yap Jing Wei, Yong Kien Thai, Khew Gillian S. W.ORCID, Salojärvi JarkkoORCID, Michael Todd P.ORCID, Middleton David J.ORCID, Burslem David F. R. P.ORCID, Lindqvist CharlotteORCID, Lucas Eve J.ORCID, Albert Victor A.ORCID
Abstract
AbstractSpecies 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 whileSyzygiumshares an ancient genome doubling event with other Myrtales, little evidence exists for recent polyploidy events. Phylogenomics confirms thatSyzygiumoriginated 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 inSyzygiumdiversification.
Funder
Nanyang Technological University Garden City Fund, National Parks Board (NParks), Singapore
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
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