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Molecular phylogenetic species delimitation in the aquatic genus Ottelia (Hydrocharitaceae) reveals cryptic diversity within a widespread species
Ito, Yu1; Tanaka, Norio2; Barfod, Anders S.; Bogner, Josef4; Li, Jie; Yano, Okihito5; Gale, Stephan W.
2019
Source PublicationJOURNAL OF PLANT RESEARCH
ISSN0918-9440
Volume132Issue:xPages:335-344
Abstract

Ottelia, a pantropical genus of aquatic plants belonging to the family Hydrocharitaceae, includes several narrowly distributed taxa in Asia. Although the Asian species have received comparatively more research attention than congeners in other areas, various key taxonomic questions remain unaddressed, especially with regards to apparent cryptic diversity within O. alismoides, a widespread species complex native to Asia, northern Australia and tropical Africa. Here we test taxonomic concepts and evaluate species boundaries using a phylogenetic framework. We sampled five of the seven species of Ottelia in Asia as well as each species endemic to Africa and Australia; multiple samples of O. alismoides were obtained from across Asia. Phylogenetic trees based on five plastid DNA markers and the nuclear ITS region shared almost identical topologies. A Bayesian coalescent method of species delimitation using the multi-locus data set discerned one species in Africa, one in Australia and four in Asia with the highest probability. The results lead us to infer that a population sampled in Thailand represents a hitherto unrecognised cryptic taxon within the widespread species complex, although the apparent lack of unambiguous diagnostic characters currently precludes formal description. Conversely, no molecular evidence for distinguishing O. cordata and O. emersa was obtained, and so the latter is synonymised under the former. Two accessions that exhibit inconsistent positions among our phylogenetic trees may represent cases of chloroplast capture, however incomplete lineage sorting or polyploidy are alternative hypotheses that ought to be tested using other molecular markers.

KeywordINFERENCE RBCL DNA MRBAYES ORIGIN
Subject AreaPlant Sciences
DOI10.1007/s10265-019-01109-7
Indexed BySCI
Language英语
WOS IDWOS:000467486400005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11323
Collection植物系统与保护生物学研究组
Affiliation1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Ctr Integrat Conservat, Plant Phylogenet & Conservat Grp, Kunming 650223, Yunnan, Peoples R China
2.Setsunan Univ, Fac Pharmaceut Sci, Osaka 5730101, Japan
3.Natl Museum Nat & Sci, Tsukuba Bot Garden, Tsukuba, Ibaraki 3050005, Japan
4.Barfod, Anders S.] Aarhus Univ, Dept Biosci, DK-8000 Aarhus C, Denmark
5.Augsburger Str 43a, D-86368 Gersthofen, Germany
6.Okayama Univ Sci, Fac Biosphere Geosphere Sci, Okayama 7000005, Japan
7.Gale, Stephan W.] Kadoorie Farm & Bot Garden, Tai Po, Lam Kam Rd, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Ito, Yu,Tanaka, Norio,Barfod, Anders S.,et al. Molecular phylogenetic species delimitation in the aquatic genus Ottelia (Hydrocharitaceae) reveals cryptic diversity within a widespread species[J]. JOURNAL OF PLANT RESEARCH,2019,132(x):335-344.
APA Ito, Yu.,Tanaka, Norio.,Barfod, Anders S..,Bogner, Josef.,Li, Jie.,...&Gale, Stephan W..(2019).Molecular phylogenetic species delimitation in the aquatic genus Ottelia (Hydrocharitaceae) reveals cryptic diversity within a widespread species.JOURNAL OF PLANT RESEARCH,132(x),335-344.
MLA Ito, Yu,et al."Molecular phylogenetic species delimitation in the aquatic genus Ottelia (Hydrocharitaceae) reveals cryptic diversity within a widespread species".JOURNAL OF PLANT RESEARCH 132.x(2019):335-344.
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