دورية أكاديمية
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Using an integrated approach to identify cryptic species, divergence patterns and hybrid species in Asian ladies' tresses orchids (Spiranthes, Orchidaceae).

التفاصيل البيبلوغرافية
العنوان: Using an integrated approach to identify cryptic species, divergence patterns and hybrid species in Asian ladies' tresses orchids (Spiranthes, Orchidaceae).
المؤلفون: Surveswaran S; School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China. Electronic address: siddhu@graduate.hku.hk., Gowda V; Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal 462066, India. Electronic address: gowdav@iiserb.ac.in., Sun M; School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China. Electronic address: meisun@hku.hk.
المصدر: Molecular phylogenetics and evolution [Mol Phylogenet Evol] 2018 Jul; Vol. 124, pp. 106-121. Date of Electronic Publication: 2018 Mar 02.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Academic Press Country of Publication: United States NLM ID: 9304400 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-9513 (Electronic) Linking ISSN: 10557903 NLM ISO Abbreviation: Mol Phylogenet Evol Subsets: MEDLINE
أسماء مطبوعة: Publication: San Diego, CA ; Orlando, FL : Academic Press
Original Publication: San Diego : Academic Press, c1992-
مواضيع طبية MeSH: Biological Evolution* , Genetic Variation* , Hybridization, Genetic*, Orchidaceae/*genetics, DNA, Chloroplast/genetics ; DNA, Ribosomal Spacer/genetics ; Likelihood Functions ; Phylogeny ; Phylogeography ; Sequence Analysis, DNA ; Species Specificity ; Time Factors
مستخلص: Spiranthes (∼36 species, Orchidaceae) is a small genus with a global distribution. It has a center of diversity in North America with only a few species occurring in Asia. This study focuses on the Asian Spiranthes with an emphasis on understanding their biogeographic relationships and species delimitations using molecular markers. Our phylogenetic trees based on nuclear (ITS) and chloroplast (trnL-trnLF, matK and trnS-G) sequences from samples across their range in Asia revealed the Asian Spiranthes are monophyletic. Ancestral area optimization suggested that North America forms the ancestral region for the Asian Spiranthes rather than Europe suggesting that they originated from a single long-distance dispersal event. Our study also revealed the presence of a cryptic species S. himalayensis, which was discovered based on molecular data thus emphasizing the importance of wide geographical sampling in phylogenetic studies. Sequences of cloned ITS provided support for the hypothesis that natural hybridization between S. sinensis and the newly described S. himalayensis resulted in the allotetraploid S. hongkongensis, with S. himalayensis as the paternal parent. One of the species complexes known in Asia is the S. sinensis complex, which shows a wide occurrence and is known for local geographical variants. Some of these variants have been described as new species in Australia and New Zealand. Our studies show that all the sampled variants including the Australian and New Zealand species show monophyly despite having long branches. This suggests that there may be high rates of gene flow between the geographically distinct forms resulting in lack of species resolution within the S. sinensis complex.
(Copyright © 2018 School of Biological Sciences, The University of Hong Kong. Published by Elsevier Inc. All rights reserved.)
فهرسة مساهمة: Keywords: Biogeography; Molecular dating; Molecular phylogeny; Species complex; Spiranthes
المشرفين على المادة: 0 (DNA, Chloroplast)
0 (DNA, Ribosomal Spacer)
تواريخ الأحداث: Date Created: 20180305 Date Completed: 20181211 Latest Revision: 20181211
رمز التحديث: 20240628
DOI: 10.1016/j.ympev.2018.02.025
PMID: 29501785
قاعدة البيانات: MEDLINE
الوصف
تدمد:1095-9513
DOI:10.1016/j.ympev.2018.02.025