Shu Jiang-Ping, Shang Hui, Jin Dongmei, Wei Hong-Jin, Zhou Xi-Le, Liu Hong-Mei, Gu Yu-Feng, Wang Ying, Wang Fa-Guo, Shen Hui, Zhang Rui, Adjie Bayu, Yan Yue-Hong
Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai, China.
College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China.
PLoS One. 2017 Mar 15;12(3):e0164604. doi: 10.1371/journal.pone.0164604. eCollection 2017.
Because synonymy treatment traditionally relies on morphological judgments, it usually causes many problems in species delimitation and in the biodiversity catalogue. For example, Diplopterygium simulans, which belongs to the Gleicheniaceae family, has been considered to be synonymous with D. glaucum or D. giganteum based mainly on the morphology of its pinna rachis and blade. In the absence of molecular evidence, these revisions remain doubtful. DNA barcoding, which is considered to be a powerful method for species-level identification, was employed to assess the genetic distance among 9 members of the Diplopterygium genus. The results indicate that D. simulans is an independent species rather than a synonymy of D. glaucum or D. giganteum. Moreover, phylogenetic analysis uncovered the sisterhood of D. simulans and D. cantonense, which is supported by their geographical distributions and morphological traits. Incorrect synonymy treatment is prevalent in the characterization of biological diversity, and our study proposes a convenient and effective method for validating synonym treatments and discovering cryptic species.
由于传统上同义词处理依赖于形态学判断，所以它通常在物种界定和生物多样性编目中引发许多问题。例如，属于里白科的中华里白主要基于其羽片轴和叶片的形态，一直被认为是华东里白或大里白的同义词。在缺乏分子证据的情况下，这些修订仍然存疑。DNA条形码技术被认为是一种用于物种水平鉴定的有力方法，被用于评估里白属9个成员之间的遗传距离。结果表明，中华里白是一个独立的物种，而不是华东里白或大里白的同义词。此外，系统发育分析揭示了中华里白和广东里白的姐妹关系，这得到了它们地理分布和形态特征的支持。不正确的同义词处理在生物多样性特征描述中很普遍，我们的研究提出了一种方便有效的方法来验证同义词处理和发现隐存物种。
