Morphological characterization and phylogenetic relationships of Indochinese box turtles-The Cuora galbinifrons complex
文献类型： 外文期刊
作者： Liu, Xiaoli 1 ; Li, Wei 1 ; Ye, Zhaoyang 1 ; Zhu, Yanyu 1 ; Hong, Xiaoyou 1 ; Zhu, Xinping 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Minist Agr,Key Lab Aquat Genom, Key Lab Trop & Subtrop Fishery Resource Applicat, Guangzhou 510380, Guangdong, Peoples R China
2.Shanghai Ocean Univ, Coll Life Sci & Fisheries, Shanghai, Peoples R China
关键词： Cuora; molecular marker; morphology; phylogenetics; turtle
期刊名称：ECOLOGY AND EVOLUTION （ 影响因子：2.912； 五年影响因子：3.271 ）
ISSN： 2045-7758
年卷期：
页码：
收录情况： SCI
摘要： The members of the Indochinese box turtle complex, namely Cuora galbinifrons, Cuora bourreti, and Cuora picturata, rank the most critically endangered turtle species on earth after more than three decades of over-harvesting for food, traditional Chinese medicine, and pet markets. Despite advances in molecular biology, species boundaries and phylogenetic relationships, the status of the C. galbinifrons complex remains unresolved due to the small number of specimens observed and collected in the field. In this study, we present analyses of morphologic characters as well as mitochondrial and nuclear DNA data to reconstruct the species boundaries and systematic relationships within the C. galbinifrons complex. Based on principal component analysis (PCA) and statistical analysis, we found that phenotypic traits partially overlapped among galbinifrons, bourreti, and picturata, and that galbinifrons and bourreti might be only subspecifically distinct. Moreover, we used the mitochondrial genome, COI, and nuclear gene Rag1 under the maximum likelihood criteria and Bayesian inference criteria to elucidate whether C. galbinifrons could be divided into three separate species or subspecies. We found strong support for a sister relationship between picturata and the other two species, and consequently, we recommend maintaining picturata as a full species, and classifying bourreti and galbinifrons as subspecies of C. galbinifrons. These findings provide evidence for a better understanding of the evolutionary histories of these critically endangered turtles.
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