Genomic insights into rapid speciation within the world’s largest tree genus [PREPRINT].
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Resource type
Journal article
Creator (person)
Low, Yee Wen
Rajaraman, Sitaram
Tomlin, Crystal
Ahmad, Joffre Ali
Ardi, Wisnu
Armstrong, Kate
Athen, Parusuraman
Berhaman, Ahmad
Bone, Ruth
Cheek, Martin
Cho, Nicholas Rui Wen
Choo, Le Min
Cowie, Ian
Crayn, Darren
Fleck, Steve
Ford, Andrew
Forster, Paul
Girmansyah, Deden
Goyder, David
Gray, Bruce
Heatubun, Charlie
Ibrahim, Ali
Ibrahim, Bazilah
Jayasinghe, Himesh
Kalat, Muhammad Ariffin
Kathriarachchi, Hashendra
Kintamani, Endang
Koh, Sin Lan
Lai, Joseph Tuck Kwong
Lee, Serena Mei Lynn
Leong, Paul Kiam Fee
Lim, Weihao
Lum, Shawn Kaihekulani Yamauchi
Mahyuni, Ridha
McDonald, William
Metali, Faizah
Mustaqim, Wendy
Naiki, Akiyo
Ngo, Kang Min
Niissalo, Matti
Ranasinghe, Subhani
Repin, Remi
Rustiami, Himmah
Simbiak, Victor
Sukri, Rahayu
Sunarti, Siti
Trethowan, Liam
Trias-Blasi, Anna
Vasconcelos, Thais
Wanma, Jimmy
Widodo, Pudji
Wijesundara, Douglas Siril
Worboys, Stuart
Yap, Jing Wei
Yong, Kien Thai
Khew, Gillian S.W.
Salojärvi, Jarkko
Michael, Todd
Middleton, David
Burslem, David
Lindqvist, Charlotte
Lucas, Eve
Albert, Victor
Date published
October 22, 2021
Abstract
Species radiations have long fascinated biologists, but the contribution of adaptation to observed diversity and speciation is still an open question. Here, we explore this question using the clove genus, Syzygium, the world’s largest genus of tree species comprising approximately 1200 species. We dissect Syzygium diversity through shotgun sequencing of 182 distinct species and 58 additional as-yet unidentified taxa, and assess their genetic diversity against a chromosome-level reference genome of the sea apple, Syzygium grande. We show that Syzygium grande shares a whole genome duplication (WGD) event with other Myrtales. Genomic analyses confirm that Syzygium originated in Sahul (Australia-New Guinea), and later diversified eastward to the Hawaiian Islands and westward in multiple independent migration events. The migrations were associated with bursts of speciation events, visible by poorly resolved branches on phylogenies and networks, some of which were likely confounded by incomplete lineage sorting. Clinal genomic variation in some sublineages follows phylogenetic progression, which coupled with sympatric occurrences of distantly related species suggests that both geographic and ecological speciation have been important in the diversification of Syzygium. Together, these results point to a mixture of both neutral and adaptive drivers having contributed to the radiation of the genus.
Funder
| Funder name | Awards |
National Parks Board - Singapore | |
Nanyang Technological University, Singapore | |
Academy of Finland | Decision 318288 |
National Science Foundation, United States | Grant no. 2030871 - Grant no. 1854550 |
University of the Ryukyus, Japan | Strategic research grant no. 17SP01302 |
Environmental Restoration and Conservation Agency, Japan | Environment Research and Technology Development Fund (JPMEERF20204003) |
Journal title
Nature Portfolio
Publisher
Research Square Platform LLC
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In Copyright
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