Systematics of the genus Salweenia (Leguminosae) from Southwest China with discovery of a second species

	Systematics of the genus Salweenia (Leguminosae) from Southwest China with discovery of a second species
	Yue, Xue-Kun 1,2; Yue, Ji-Pei 2; Yang, Li-Er 1; Li, Zhi-Min 1; Sun, Hang2
通讯作者	lizhimin_vip@163.com ; hsun@mail.kib.ac.cn
	2011-10-01
发表期刊	TAXON
ISSN	0040-0262
卷号	60 期号:5 页码:1366-1374
摘要	Salweenia (Leguminosae) has long been defined as a monotypic genus. In this study we carried out comprehensive studies on populations of S. wardii Baker f. across its distribution range. The results showed that this species diverged into two distinct groups: plants from the Yalong Jiang valley have linear leaflets 0.07-0.14 cm wide and relatively flattened legumes, as well as a 2A karyotype asymmetry, whereas plants from the Nu Jiang and Lancang Jiang drainages have lanceolate leaflets 0.20-0.34 cm wide, undulant legumes, and a IA karyotype asymmetry. Furthermore, molecular phylogenetic analysis of four chloroplast DNA markers (trnL-F, rpl32-trnL, psbA-trnH, trnS-G) recovered two reciprocally monophyletic clades among accessions of plants from these two areas respectively. We therefore recognize individuals of S. wardii in the Yalong Jiang valley as a separate species, S. bouffordiana sp.nov. Salweenia thus contains two allopatrically distributed species and the genus is no longer monotypic. The origin of the disjunction between the two species is briefly discussed and it is hypothesized to have come about through vicariance, resulting of several historic river separations, reversal and capture events estimated to have taken place during the Pleistocene.
关键词	Chloroplast Dna Sequence Cytology Morphology New Species River Capture Sophoreae Vicariance
学科领域	Plant Sciences ; Evolutionary Biology
收录类别	SCI
语种	英语
WOS记录号	WOS:000296487300012
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/3914
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Yunnan Normal Univ, Sch Life Sci, Kunming 650031, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
推荐引用方式 GB/T 7714	Yue, Xue-Kun,Yue, Ji-Pei,Yang, Li-Er,et al. Systematics of the genus Salweenia (Leguminosae) from Southwest China with discovery of a second species[J]. TAXON,2011,60(5):1366-1374.
APA	Yue, Xue-Kun,Yue, Ji-Pei,Yang, Li-Er,Li, Zhi-Min,&Sun, Hang.(2011).Systematics of the genus Salweenia (Leguminosae) from Southwest China with discovery of a second species.TAXON,60(5),1366-1374.
MLA	Yue, Xue-Kun,et al."Systematics of the genus Salweenia (Leguminosae) from Southwest China with discovery of a second species".TAXON 60.5(2011):1366-1374.

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