Using morphological, molecular and climatic data to delimitate yews along the Hindu Kush-Himalaya and adjacent regions
Despite the availability of several studies to clarify taxonomic problems on the highly threatened yews of the Hindu Kush-Himalaya (HKH) and adjacent regions, the total number of species and their exact distribution ranges remains controversial. We explored the use of comprehensive sets of morpholog...
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| Veröffentlicht in: | PloS one 2012-10, Vol.7 (10), p.e46873-e46873 |
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| creator | Poudel, Ram C Möller, Michael Gao, Lian-Ming Ahrends, Antje Baral, Sushim R Liu, Jie Thomas, Philip Li, De-Zhu |
| description | Despite the availability of several studies to clarify taxonomic problems on the highly threatened yews of the Hindu Kush-Himalaya (HKH) and adjacent regions, the total number of species and their exact distribution ranges remains controversial. We explored the use of comprehensive sets of morphological, molecular and climatic data to clarify taxonomy and distributions of yews in this region.
A total of 743 samples from 46 populations of wild yew and 47 representative herbarium specimens were analyzed. Principle component analyses on 27 morphological characters and 15 bioclimatic variables plus altitude and maximum parsimony analysis on molecular ITS and trnL-F sequences indicated the existence of three distinct species occurring in different ecological (climatic) and altitudinal gradients along the HKH and adjacent regions Taxus contorta from eastern Afghanistan to the eastern end of Central Nepal, T. wallichiana from the western end of Central Nepal to Northwest China, and the first report of the South China low to mid-elevation species T. mairei in Nepal, Bhutan, Northeast India, Myanmar and South Vietnam.
The detailed sampling and combination of different data sets allowed us to identify three clearly delineated species and their precise distribution ranges in the HKH and adjacent regions, which showed no overlap or no distinct hybrid zone. This might be due to differences in the ecological (climatic) requirements of the species. The analyses further provided the selection of diagnostic morphological characters for the identification of yews occurring in the HKH and adjacent regions. Our work demonstrates that extensive sampling combined with the analysis of diverse data sets can reliably address the taxonomy of morphologically challenging plant taxa. |
| doi_str_mv | 10.1371/journal.pone.0046873 |
| format | Article |
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A total of 743 samples from 46 populations of wild yew and 47 representative herbarium specimens were analyzed. Principle component analyses on 27 morphological characters and 15 bioclimatic variables plus altitude and maximum parsimony analysis on molecular ITS and trnL-F sequences indicated the existence of three distinct species occurring in different ecological (climatic) and altitudinal gradients along the HKH and adjacent regions Taxus contorta from eastern Afghanistan to the eastern end of Central Nepal, T. wallichiana from the western end of Central Nepal to Northwest China, and the first report of the South China low to mid-elevation species T. mairei in Nepal, Bhutan, Northeast India, Myanmar and South Vietnam.
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A total of 743 samples from 46 populations of wild yew and 47 representative herbarium specimens were analyzed. Principle component analyses on 27 morphological characters and 15 bioclimatic variables plus altitude and maximum parsimony analysis on molecular ITS and trnL-F sequences indicated the existence of three distinct species occurring in different ecological (climatic) and altitudinal gradients along the HKH and adjacent regions Taxus contorta from eastern Afghanistan to the eastern end of Central Nepal, T. wallichiana from the western end of Central Nepal to Northwest China, and the first report of the South China low to mid-elevation species T. mairei in Nepal, Bhutan, Northeast India, Myanmar and South Vietnam.
The detailed sampling and combination of different data sets allowed us to identify three clearly delineated species and their precise distribution ranges in the HKH and adjacent regions, which showed no overlap or no distinct hybrid zone. This might be due to differences in the ecological (climatic) requirements of the species. The analyses further provided the selection of diagnostic morphological characters for the identification of yews occurring in the HKH and adjacent regions. Our work demonstrates that extensive sampling combined with the analysis of diverse data sets can reliably address the taxonomy of morphologically challenging plant taxa.</description><subject>Asia</subject><subject>Biodiversity</subject><subject>Biogeography</subject><subject>Biology</subject><subject>Botany</subject><subject>Climate</subject><subject>Climatic data</subject><subject>Conservation of Natural Resources</subject><subject>Data processing</subject><subject>Datasets</subject><subject>Diagnostic systems</subject><subject>Earth Sciences</subject><subject>Ecological monitoring</subject><subject>Flowers & plants</subject><subject>Forest products</subject><subject>Genomics</subject><subject>Germplasm</subject><subject>Laboratories</subject><subject>Morphology</subject><subject>Museums</subject><subject>Natural history</subject><subject>Phylogenetics</subject><subject>Pinaceae</subject><subject>Plant sciences</subject><subject>Population</subject><subject>Sampling</subject><subject>Species</subject><subject>Studies</subject><subject>Taxa</subject><subject>Taxonomy</subject><subject>Taxus - 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Poudel, Ram C</au><au>Möller, Michael</au><au>Gao, Lian-Ming</au><au>Ahrends, Antje</au><au>Baral, Sushim R</au><au>Liu, Jie</au><au>Thomas, Philip</au><au>Li, De-Zhu</au><au>Joly, Simon</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Using morphological, molecular and climatic data to delimitate yews along the Hindu Kush-Himalaya and adjacent regions</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2012-10-08</date><risdate>2012</risdate><volume>7</volume><issue>10</issue><spage>e46873</spage><epage>e46873</epage><pages>e46873-e46873</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Despite the availability of several studies to clarify taxonomic problems on the highly threatened yews of the Hindu Kush-Himalaya (HKH) and adjacent regions, the total number of species and their exact distribution ranges remains controversial. We explored the use of comprehensive sets of morphological, molecular and climatic data to clarify taxonomy and distributions of yews in this region.
A total of 743 samples from 46 populations of wild yew and 47 representative herbarium specimens were analyzed. Principle component analyses on 27 morphological characters and 15 bioclimatic variables plus altitude and maximum parsimony analysis on molecular ITS and trnL-F sequences indicated the existence of three distinct species occurring in different ecological (climatic) and altitudinal gradients along the HKH and adjacent regions Taxus contorta from eastern Afghanistan to the eastern end of Central Nepal, T. wallichiana from the western end of Central Nepal to Northwest China, and the first report of the South China low to mid-elevation species T. mairei in Nepal, Bhutan, Northeast India, Myanmar and South Vietnam.
The detailed sampling and combination of different data sets allowed us to identify three clearly delineated species and their precise distribution ranges in the HKH and adjacent regions, which showed no overlap or no distinct hybrid zone. This might be due to differences in the ecological (climatic) requirements of the species. The analyses further provided the selection of diagnostic morphological characters for the identification of yews occurring in the HKH and adjacent regions. Our work demonstrates that extensive sampling combined with the analysis of diverse data sets can reliably address the taxonomy of morphologically challenging plant taxa.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23056501</pmid><doi>10.1371/journal.pone.0046873</doi><tpages>e46873</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Asia Biodiversity Biogeography Biology Botany Climate Climatic data Conservation of Natural Resources Data processing Datasets Diagnostic systems Earth Sciences Ecological monitoring Flowers & plants Forest products Genomics Germplasm Laboratories Morphology Museums Natural history Phylogenetics Pinaceae Plant sciences Population Sampling Species Studies Taxa Taxonomy Taxus - anatomy & histology Taxus - classification Taxus - cytology Taxus baccata Timber Yew |
| title | Using morphological, molecular and climatic data to delimitate yews along the Hindu Kush-Himalaya and adjacent regions |
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