Existence of biogeographic barriers for the long-term Neogene–Quaternary divergence and differentiation of Koenigia forrestii in the Himalaya–Hengduan Mountains

Author:

Rana Hum Kala12ORCID,Rana Santosh Kumar1,Luo Dong1,Sun Hang1ORCID

Affiliation:

1. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, CAS , #132 Lanhei Road, Kunming 650201 , China

2. University of Chinese Academy of Sciences , Beijing 100049 , China

Abstract

Abstract The prolonged interplay between orographic and climatic changes creates biogeographic barriers, resulting in the allopatric differentiation of plants in the Himalaya–Hengduan Mountains. Such consequences have led us to investigate the long-term Neogene–Quaternary geo-climatic history of the Eastern Himalaya–Hengduan Mountains. Narrowly distributed populations of Koenigia forrestii were sampled (ten populations, 97 individuals) and analysed for their genetic architecture, including phylogenetic reconstruction (based on plastome and plastid DNA/nuclear regions), molecular dating and demography, in combination with niche dynamics. We estimated that K. forrestii (stem age: 11.39 Mya) diverged into three non-overlapping distributed lineages during the Neogene–Quaternary periods (5.84–2.57 Mya), with Eastern Himalaya (EHa) being the first and most diverse lineage. ‘Isolation by environment’ revealed the existence of genetic structures that were significantly affected by the disparate environment. The presence of demographic events is well supported by the Bayesian skyline plot, indicating recent demographic expansion. Hence, lineage divergence and differentiation were mainly triggered by the heterogeneous environment associated with the biogeographic barriers due to the Tsangpo-Brahmaputra Grand Canyon, Mekong-Salween Divide and local mountain systems. Nevertheless, niche shift and local adaptation are the keys to determining the genetic architecture, demographic dynamics and diversification history of K. forrestii.

Publisher

Oxford University Press (OUP)

Subject

Plant Science,Ecology, Evolution, Behavior and Systematics

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3