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题名: Phylogenetic placement of the enigmatic and critically endangered genus Saniculiphyllum (Saxifragaceae) inferred from combined analysis of plastid and nuclear DNA sequences
作者: Xiang, Chun-Lei1; Gitzendanner, Matthew A.2; Soltis, Douglas E.2; null(彭华)1; Lei, Li-Gong1
刊名: MOLECULAR PHYLOGENETICS AND EVOLUTION
关键词: China ; Endemic ; Heucheroid clade ; Saniculiphyllum guangxiense ; Saxifragales ; Phylogenetic analysis
英文摘要: Saniculiphyllum, a monotypic genus distributed in Southwest China, was thought to be extinct before our recent rediscovery. The taxonomic position of this genus has been enigmatic ever since its publication. It was originally treated as the only member of a distinct tribe Saniculiphylleae in the family Saxifragaceae. Some proposed a new family, Saniculophyllaceae, to accommodate this genus, although its affinities are clearly with members of Saxifragaceae. Here we analyzed six DNA regions, the nuclear ribosomal ITS and 26S rDNA and the plastid rbcL, matK, trnL-trnF, psbA-trnH genes, spacers, and intron to explore the phylogenetic position of Saniculiphyllum within Saxifragaceae. The combined nuclear and chloroplast dataset includes 63 ingroup species, representing all genera but Hieronymusia in the family. Results from likelihood, parsimony and Bayesian phylogenetic methods corroborate earlier results. Two clades of Saxifragaceae, the Heucheroid and Saxifragoid clades, were recovered. The topologies obtained from different analyses confirm the placement of Saniculiphyllum in Saxifragaceae, but our analyses reveal that Saniculiphyllum is embedded within the large Heucheroid clade. However, the closest relatives of Saniculiphyllum within the Heucheroid clade remain unclear. Combined with morphological data, our results suggest that Saniculiphyllum should best be regarded as a highly distinctive lineage within the Heucheroid clade of Saxifragaceae. Morphological novelties and conservation status of Saniculiphyllum are also presented. (C) 2012 Elsevier Inc. All rights reserved.
出版日期: 2012-08-01
卷号: 64, 期号:2, 页码:357-367
语种: 英语
收录类别: SCI
学科分类: Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
ISSN号: 1055-7903
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/17631
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650201, Yunnan, Peoples R China
2.Univ Florida, Dept Biol, Gainesville, FL 32611 USA

Recommended Citation:
Xiang,Chun-Lei;Gitzendanner,Matthew A.;Soltis,Douglas E.;Peng,Hua;Lei,Li-Gong.Phylogenetic placement of the enigmatic and critically endangered genus Saniculiphyllum (Saxifragaceae) inferred from combined analysis of plastid and nuclear DNA sequences,MOLECULAR PHYLOGENETICS AND EVOLUTION,2012,64(2):357-367
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