The East Asian Winter Monsoon Acts as a Major Selective Factor in the Intraspecific Differentiation of Drought-Tolerant Nitraria tangutorum in Northwest China

NWIPB OpenIR

	The East Asian Winter Monsoon Acts as a Major Selective Factor in the Intraspecific Differentiation of Drought-Tolerant Nitraria tangutorum in Northwest China
	Yin, Hengxia; Wang, Lirong; Shi, Yong; Qian, Chaoju; Zhou, Huakun; Wang, Wenying; Ma, Xiao-Fei; Lam-Son Phan Tran; Zhang, Benyin
	2020
发表期刊	PLANTS-BASEL
卷号	9 期号:9
摘要	The influence of Quaternary climate fluctuation on the geographical structure and genetic diversity of species distributed in the regions of the Qinghai-Tibet Plateau (QTP) has been well established. However, the underlying role of the East Asian monsoon system (EAMS) in shaping the genetic structure of the population and the demography of plants located in the arid northwest of China has not been explored. In the present study, Nitraria tangutorum, a drought-tolerant desert shrub that is distributed in the EAMS zone and has substantial ecological and economic value, was profiled to better understand the influence of EAMS evolution on its biogeographical patterns and demographic history. Thus, the phylogeographical structure and historical dynamics of this plant species were elucidated using its five chloroplast DNA (cpDNA) fragments. Hierarchical structure analysis revealed three distinct, divergent lineages: West, East-A, and East-B. The molecular dating was carried out using a Bayesian approach to estimate the time of intraspecies divergence. Notably, the eastern region, which included East-A and East-B lineages, was revealed to be the original center of distribution and was characterized by a high level of genetic diversity, with the intraspecific divergence time dated to be around 2.53 million years ago (Ma). These findings, combined with the data obtained by ecological niche modeling analysis, indicated that the East lineages have undergone population expansion and differentiation, which were closely correlated with the development of the EAMS, especially the East Asian winter monsoon (EAWM). The West lineage appears to have originated from the migration of N. tangutorum across the Hexi corridor at around 1.85 Ma, and subsequent colonization of the western region. These results suggest that the EAWM accelerated the population expansion of N. tangutorum and subsequent intraspecific differentiation. These findings collectively provide new information on the impact of the evolution of the EAMS on intraspecific diversification and population demography of drought-tolerant plant species in northwest China.
关键词	Nitraria tangutorum genetic structure intraspecific divergence ecological niche modeling East Asian winter monsoon
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60256
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yin, Hengxia,Wang, Lirong,Shi, Yong,et al. The East Asian Winter Monsoon Acts as a Major Selective Factor in the Intraspecific Differentiation of Drought-Tolerant Nitraria tangutorum in Northwest China[J]. PLANTS-BASEL,2020,9(9).
APA	Yin, Hengxia.,Wang, Lirong.,Shi, Yong.,Qian, Chaoju.,Zhou, Huakun.,...&Zhang, Benyin.(2020).The East Asian Winter Monsoon Acts as a Major Selective Factor in the Intraspecific Differentiation of Drought-Tolerant Nitraria tangutorum in Northwest China.PLANTS-BASEL,9(9).
MLA	Yin, Hengxia,et al."The East Asian Winter Monsoon Acts as a Major Selective Factor in the Intraspecific Differentiation of Drought-Tolerant Nitraria tangutorum in Northwest China".PLANTS-BASEL 9.9(2020).