干旱区生态环境知识资源中心(Arid): Phylogenetic relationships and biogeographic history of the unique Saxifraga sect. Irregulares (Saxifragaceae) from eastern Asia

Arid

	Phylogenetic relationships and biogeographic history of the unique Saxifraga sect. Irregulares (Saxifragaceae) from eastern Asia
	Zhang Menghua; Wang Chaoyong; Zhang Cheng; Zhang Daigui; Li Kegang; Nie Zelong; Meng Ying
来源期刊	植物分类学报
ISSN	1674-4918
出版年	2020
卷号	58 期号:6
英文摘要	Saxifraga L. is the largest genus in Saxifragaceae and a characteristic component of the herbaceous flora of the temperate and alpine mountains in the Northern Hemisphere. Section Irregulares is a small group of 15-20 species, representing one of the early-diverged lineages in the genus characterized with unique zygomorphic flowers. We used both nuclear internal transcribed spacer and chloroplast DNA regions (psbA-trnH, trnL-F, and matK) to reconstruct its species relationships, estimate divergence times, and infer its historical biogeography. Our phylogenetic results corroborate the monophyly of sect. Irregulares and its sister relationship to sect. Heterisia from North America. The section was well resolved into two lineages corresponding to their morphological features and biogeographic distributions. One represents ser. Stoloniferae including S. stolonifera Curtis and S. nipponica Makino with long-creeping stolons/rhizomes and small petals with spots and the other comprises the remaining taxa (ser. Rufescentes) which lack long-creeping rhizomes. Spots on leaves (abaxially spotted vs. abaxially without spots) and spots on petals (without spots vs. with spots) are inferred to be phylogenetically informative within ser. Rufescentes. Divergence time estimates and ancestral area analysis suggested a western North American origin of sect. Irregulares with migration into East Asia by way of the Bering land bridge in the Middle Oligocene. The development of drying and desertification belt in the late Miocene could have played an important role in the subsequent restriction and separation of the north and south lineages within eastern Asia.
英文关键词	eastern Asia historical biogeography Saxifraga sect. Irregulares Saxifragaceae
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6879784
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353999
推荐引用方式 GB/T 7714	Zhang Menghua,Wang Chaoyong,Zhang Cheng,et al. Phylogenetic relationships and biogeographic history of the unique Saxifraga sect. Irregulares (Saxifragaceae) from eastern Asia[J],2020,58(6).
APA	Zhang Menghua.,Wang Chaoyong.,Zhang Cheng.,Zhang Daigui.,Li Kegang.,...&Meng Ying.(2020).Phylogenetic relationships and biogeographic history of the unique Saxifraga sect. Irregulares (Saxifragaceae) from eastern Asia.植物分类学报,58(6).
MLA	Zhang Menghua,et al."Phylogenetic relationships and biogeographic history of the unique Saxifraga sect. Irregulares (Saxifragaceae) from eastern Asia".植物分类学报 58.6(2020).