Journal
G3-GENES GENOMES GENETICS
Volume 11, Issue 7, Pages -Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/g3journal/jkab136
Keywords
phylogenomics; Malvaceae s.l; next-generation sequencing; plastomes; historical diversification
Categories
Funding
- China Scholarship Council [2016GXZS80]
- China Postdoctoral Science Foundation [2015M582481, 2016T90822]
- Guangxi University
- Bagui Scholarship team funding [C33600992001]
- provincial government of Guangxi Province (100 Talents Program
- recruitment of overseas talents for colleges and universities in Guangxi)
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This study used plastid genomes of 48 samples to resolve relationships within major clades of Malvaceae, confirming the split of the family into two branches and revealing the origins of subfamilies. The findings provide a strong phylogenetic framework for downstream revisions and evolutionary studies of Malvaceae.
Malvaceae s.l., the most diverse family within Malvales, includes well-known species of great economic importance like cotton, cacao, and durian. Despite numerous phylogenetic analyses employing multiple markers, relationships between several of its nine subfamilies, particularly within the largest lineage /Malvadendrina, remain unclear. In this study, we attempted to resolve the relationships within the major clades of Malvaceae s.l. using plastid genomes of 48 accessions representing all subfamilies. Maximum likelihood and Bayesian analyses recovered a fully resolved and well-supported topology confirming the split of the family into /Byttneriina (/Grewioideae +/Byttnerioideae) and /Malvadendrina. Within /Malvadendrina, /Helicteroideae occupied the earliest branching position, followed by /Sterculioideae, / Brownlowioideae, /Tiliodeae, and /Dombeyoideae formed a Glade sister to /Malvatheca (/Malvoideae +/Bombacoideae), a grouping morphologically supported by the lack of androgynophore. Results from dating analyses suggest that all subfamilies originated during hot or warm phases in the Late Cretaceous to Paleocene. This study presents a well-supported phylogenetic framework for Malvaceae s.l. that will aid downstream revisions and evolutionary studies of this economically important plant family.
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