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New morphological and DNA evidence supports the existence of Calligonum jeminaicum Z. M. Mao (Calligoneae, Polygonaceae) in China

Wei ShiKey Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China Turpan Eremophytes Botanic Garden, Chinese Academy of Sciences Turpan ChinaPei‐Liang LiuKey Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China Turpan Eremophytes Botanic Garden, Chinese Academy of Sciences Turpan ChinaJun WenDepartment of Botany, National Museum of Natural History, Smithsonian Institution, 20013-7012, Washington DC, USA National Museum of Natural History, Smithsonian Institution Washington United States of AmericaYing FengKey Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China Turpan Eremophytes Botanic Garden, Chinese Academy of Sciences Turpan ChinaBo‐Rong PanTurpan Eremophytes Botanic Garden, Chinese Academy of Sciences, 838008, Turpan, China Xinjiang Institute of Ecology and Geography Urumqi China

2019en

ABI

Annotatsiya

Calligonum jeminaicum Z. M. Mao, a species regarded as endemic to China, was thought to be nonexistent owing to a lack of scientific records. The similarity of C. jeminaicum to C. mongolicum Turcz. warranted an investigation into the taxonomical relationship between these species. In this study, a naturally occurring population of C. jeminaicum was discovered and the taxonomical relationships of this species with C. mongolicum were resolved. Morphological traits, including fruit and flower characteristics, as well as nuclear (ETS, ITS) and chloroplast ( psbA-trnH , ycf6-psbM , rpl32-trnL , rbc L, and trnL-F ) DNA sequence data were studied to confirm the taxonomic status of C. jeminaicum . The nrDNA data (ITS1-2 and ETS) from C. jeminaicum reflected variability from the whole C. mongolicum complex, showing distinctive haplotypes in the Calligonum sect. Medusa Sosk. &amp; Alexandr. The cpDNA data supplied similar evidence, showing unique branching in Bayesian and ML tree analyses. The specific status of C. jeminaicum is confirmed based on both morphological and molecular analyses. Here we present a revised description of C. jeminaicum along with its DNA barcode and discuss suggestions for the conservation of this species. Based on current evidence, this species was evaluated as Critically Endangered (CR) according to the IUCN criteria.

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DOI: 10.3897/phytokeys.132.34981

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