Genetic structure and demographic history of Cycas chenii (Cycadaceae), an endangered species with extremely small populations.

	Genetic structure and demographic history of Cycas chenii (Cycadaceae), an endangered species with extremely small populations.
	Yang, Rui; Feng, Xiuyan; Gong, Xun
	2017
发表期刊	Plant diversity
ISSN	2468-2659
卷号	39 期号:1 页码:44-51
摘要	Geological activities and climate oscillations during the Quaternary period profoundly impacted the distribution of species in Southwest China. Some plant species may be harbored in refugia, such as the dry-hot valleys of Southwest China. Cycas chenii X. Gong & W. Zhou, a critically endangered cycad species, which grows under the canopy in subtropical evergreen broad-leaved forests along the upstream drainage area of the Red River, is endemic to this refugium. In this study, 60 individuals of C.chenii collected from six populations were analyzed by sequencing two chloroplast intergenic spacers (cpDNA: psbA-trnH and trnL-trnF) and two nuclear genes (PHYP and RBP-1). Results showed high genetic diversity at the species level, but low within-population genetic diversity and high interpopulation genetic differentiation. A Bayesian phylogenetic tree based on cpDNA showed that five chloroplast haplotypes were clustered into two clades, which corresponds to the division of the western and eastern bank of the Red River. These data indicate a possible role for the Red River as a geographic barrier to gene flow in C.chenii. Based on our findings, we propose appropriate in situ and ex situ conservation strategies for C.chenii.
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/64858
专题	植物化学与西部植物资源持续利用国家重点实验室
推荐引用方式 GB/T 7714	Yang, Rui,Feng, Xiuyan,Gong, Xun. Genetic structure and demographic history of Cycas chenii (Cycadaceae), an endangered species with extremely small populations.[J]. Plant diversity,2017,39(1):44-51.
APA	Yang, Rui,Feng, Xiuyan,&Gong, Xun.(2017).Genetic structure and demographic history of Cycas chenii (Cycadaceae), an endangered species with extremely small populations..Plant diversity,39(1),44-51.
MLA	Yang, Rui,et al."Genetic structure and demographic history of Cycas chenii (Cycadaceae), an endangered species with extremely small populations.".Plant diversity 39.1(2017):44-51.