Abstract Detail



Biogeography

Li, Pan [1], Cai, Minqi [1], Liu, Luxian [2], Li, Zheng [1], Qi, Zhechen [3], Qiu, Yingxiong [1], Cameron, Kenneth [4], Fu, Chengxin [1].

An overlooked route to the east via South China: the phylogeny and biogeography of the East Asian genus Atractylodes (Asteraceae) revealed by RAD-seq.

Atractylodes DC. (tribe Cardueae, Asteraceae) is a small genus endemic to temperate East Asia. Previous studies showed a complex and unresolved phylogeny in this genus. To revisit the molecular phylogeny and historical biogeography of Atractylodes with RAD-seq, we sampled all the extant species, including 78 samples from 37 localities across their entire geographical ranges. We fully resolved the phylogeny of Atractylodes, with a topology of (A. carlinoides + (A. macrocephala + (A. japonica + (A. koreana + (A. chinensis + A. lancea))))). Atractylodes originated in South China during the Late Miocene. This region acted as the source area for dispersals to other areas of East Asia, and thus we argue that South China is an underappreciated route from Middle Asia to Northeast Asia. Extensive introgressions were detected between A. chinensis and A. lancea, as well as between A. chinensis and A. koreana. Frequent introgression among them may account for the difficulty in resolving the phylogeny within the so-called ‘A. lancea complex’. However, the large number of SNPs from RAD-seq overwhelms the discordant phylogenetic signals in the data and allowed us to generate a fully resolved phylogeny for the genus. In brief, this study depicts the origin and dispersal routes of Atractylodes, and the role of South China as an overlooked dispersal route from Middle Asia to Northeast Asia.


1 - Zhejiang University, College Of Life Sciences, 866 Yuhangtang Rd., Hangzhou, Zhejiang, 310058, China
2 - Henan University, College of Life Sciences, 85 Minglun St., Kaifeng, Henan, 475000, China
3 - Zhejiang Sci-Tech University, College of Life Sciences, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou, Zhejiang, 310018, China
4 - University of Wisconsin, Department of Botany, 154 Birge Hall, 450 Lincoln Drive, Madison, WI, 53706, USA

Keywords:
D-statistic
East Asia
Introgression
Cardueae
A. lancea complex.

Presentation Type: Oral Paper
Session: 4, Biogeography
Location: 105/Mayo Civic Center
Date: Monday, July 23rd, 2018
Time: 9:00 AM
Number: 4005
Abstract ID:351
Candidate for Awards:None


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