Speciation and conservation genetic assessment of two endangered cycad species

doi:10.1111/jse.13031

KIB OpenIR

	Speciation and conservation genetic assessment of two endangered cycad species
	Feng,Xiu-Yan; Gong,Yi-Qing; Nguyen,Khang Sinh; Nguyen,Hiep Tien; Liu,Yong-Bo; Liu,Jian; Gong,Xun
	2023
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	1759-6831
摘要	Understanding the driving forces of speciation is a central question in evolutionary biology. Cycas bifida (Dyer) K. D. Hill and Cycas micholitzii Dyer are two morphologically similar Cycas (Cycadaceae) species with deeply pectinate megasporophylls and dichotomously divided leaflets. Geographically, they are isolated by the Red River Fault Zone (RRFZ), which acts as a biogeographical barrier for many Cycas species. In this study, we investigated the divergence, genetic diversity, genetic structure, and demographic history of C. bifida and C. micholitzii to uncover the speciation mechanisms for the two endangered species. Results revealed high historical gene flow but low contemporary gene flow between the two species, with a deep divergence occurring in the Late Miocene. The long-term geographical isolation and ecological niche differentiation were identified as important factors in driving the divergence of the two species, supported by significant isolation by distance testing, barrier analysis, and niche consistency detection. Geographical isolation by the RRFZ played a pivotal role in facilitating their divergence by constraining gene flow. Conservation genetic analyses indicated high genetic diversity within both species, coupled with disparate responses to Pleistocene climate fluctuations: C. micholitzii experienced population expansion, while C. bifida displayed a mild bottleneck effect. To ensure the protection and long-term sustainability of two threatened species, relevant conservation guidelines were proposed based on the assessment of their genetic diversity and structure. This study furnishes valuable insights into the mechanisms underpinning species divergence and delivers actionable recommendations for cycad conservation.
关键词	conservation Cycas bifida Cycas micholitzii genetic differentiation Red River Fault Zone (RRFZ) HAPLOTYPE RECONSTRUCTION MICROSATELLITE MARKERS CONTINENTAL EXTRUSION MIGRATION RATES SHEAR ZONE INFERENCE EVOLUTION PATTERNS FLOW DIVERGENCE
DOI	10.1111/jse.13031
收录类别	SCI
WOS记录号	WOS:001115529400001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75258
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Feng,Xiu-Yan,Gong,Yi-Qing,Nguyen,Khang Sinh,et al. Speciation and conservation genetic assessment of two endangered cycad species[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2023.
APA	Feng,Xiu-Yan.,Gong,Yi-Qing.,Nguyen,Khang Sinh.,Nguyen,Hiep Tien.,Liu,Yong-Bo.,...&Gong,Xun.(2023).Speciation and conservation genetic assessment of two endangered cycad species.JOURNAL OF SYSTEMATICS AND EVOLUTION.
MLA	Feng,Xiu-Yan,et al."Speciation and conservation genetic assessment of two endangered cycad species".JOURNAL OF SYSTEMATICS AND EVOLUTION (2023).

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
10.1111_jse.13031.pd（2243KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载