干旱区生态环境知识资源中心(Arid): Interspecific delimitation and phylogenetic origin of Pugionium (Brassicaceae)

Arid

	Interspecific delimitation and phylogenetic origin of Pugionium (Brassicaceae)
	Yu Qiushi; Wang Qian; Wang Ailan; Wu Guili; Liu Jianquan
来源期刊	Journal of Systematics and Evolution
ISSN	1674-4918
出版年	2010
卷号	48 期号:3 页码:195-206
英文摘要	Pugionium (Brassicaceae) is a small genus that occurs in central Asian deserts. The interspecific delimitation and taxonomic treatments of this genus are disputed and its phylogenetic origin remains unknown. In the present study, we examined these issues based on morphological and molecular data obtained for the first time. We used statistical methods to examine inter- and intraspecific morphological variations. The results suggest that only two species, namely P. dolabratum and P. cornutum, can be warranted for all examined populations and specimens, whereas three species (P. calcaratum, P. cristatum, and P. pterocarpum) should be incorporated into P. dolabratum. This delimitation was further supported by the molecular data: all populations of P. dolabratum, P. calcaratum, P. cristatum, and P. pterocarpum shared the same internal transcribed spacer genotype, whereas those from P. cornutum had another type. Phylogenetic analyses of Pugionium and representative genera of Brassicaceae based on ndhF sequences suggest that this genus is sister to the genus Megacarpaea, which, together, comprise a well-supported lineage with Farsetia, Lobularia, Iberis, and Ionopsidium, whereas the two other genera that were previously suggested to be closely related to this genus (Isatis and Bunias) were placed in the other lineages. We further discuss the origin of Pugionium and suggest that it probably originated in central Asia when the climate became drier from the late Miocene.
英文关键词	internal transcribed spacer (ITS) interspecific delimitation morphological variation ndhF phylogenetic origin Pugionium
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3894503
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335061
作者单位	Yu Qiushi, Minqin National Studies Station for Desert Steppe Ecosystem, Division of Molecular Ecology, Key Laboratory of Arid and Grassland Ecology, School of Life Science, Lanzhou University, Minqin, 733300.; Wang Qian, Lanzhou University, Division of Molecular Ecology, Key Laboratory of Arid and Grassland Ecology, School of Life Science, Lanzhou, Gansu 730000, China.; Wang Ailan, Lanzhou University, Division of Molecular Ecology, Key Laboratory of Arid and Grassland Ecology, School of Life Science, Lanzhou, Gansu 730000, China.; Wu Guili, Lanzhou University, Division of Molecular Ecology, Key Laboratory of Arid and Grassland Ecology, School of Life Science, Lanzhou, Gansu 730000, China.; Liu Jianquan, Gansu Desert Control Research Institute, Lanzhou, Gansu 730070, China.
推荐引用方式 GB/T 7714	Yu Qiushi,Wang Qian,Wang Ailan,et al. Interspecific delimitation and phylogenetic origin of Pugionium (Brassicaceae)[J],2010,48(3):195-206.
APA	Yu Qiushi,Wang Qian,Wang Ailan,Wu Guili,&Liu Jianquan.(2010).Interspecific delimitation and phylogenetic origin of Pugionium (Brassicaceae).Journal of Systematics and Evolution,48(3),195-206.
MLA	Yu Qiushi,et al."Interspecific delimitation and phylogenetic origin of Pugionium (Brassicaceae)".Journal of Systematics and Evolution 48.3(2010):195-206.