scholarly journals Yangtze River, an insignificant genetic boundary in tufted deer (Elaphodus cephalophus): the evidence from a first population genetics study

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2654 ◽  
Author(s):  
Zhonglou Sun ◽  
Tao Pan ◽  
Hui Wang ◽  
Mujia Pang ◽  
Baowei Zhang
Keyword(s):  
Gene Flow ◽  
Yangtze River ◽  
Population Decline ◽  
Molecular Ecology ◽  
Population Increase ◽  
The Yangtze River ◽  
Population Demography ◽  
Vector Autoregressions ◽  
High Genetic Diversity ◽  
Geographical Barrier

Great rivers were generally looked at as the geographical barrier to gene flow for many taxonomic groups. The Yangtze River is the third largest river in the world, and flows across South China and into the East China Sea. Up until now, few studies have been carried out to evaluate its effect as a geographical barrier. In this study, we attempted to determine the barrier effect of the Yangtze River on the tufted deer (Elaphodus cephalophus) using the molecular ecology approach. Using mitochondrial DNA control region (CR) sequences and 13 nuclear microsatellite loci, we explored the genetic structure and gene flow in two adjacent tufted deer populations (Dabashan and Wulingshan populations), which are separated by the Yangtze River. Results indicated that there are high genetic diversity levels in the two populations, but no distinguishable haplotype group or potential genetic cluster was detected which corresponded to specific geographical population. At the same time, high gene flow was observed between Wulingshan and Dabashan populations. The tufted deer populations experienced population decrease from 0.3 to 0.09 Ma BP, then followed by a distinct population increase. A strong signal of recent population decline (T= 4,396 years) was detected in the Wulingshan population by a Markov-Switching Vector Autoregressions(MSVAR) process population demography analysis. The results indicated that the Yangtze River may not act as an effective barrier to gene flow in the tufted deer. Finally, we surmised that the population demography of the tufted deer was likely affected by Pleistocene climate fluctuations and ancient human activities.

scholarly journals How much genetic variation is stored in the endangered and fragmented shrub Tetraena mongolica Maxim?

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5645 ◽  
Author(s):  
Yingbiao Zhi ◽  
Zhonglou Sun ◽  
Ping Sun ◽  
Kai Zhao ◽  
Yangnan Guo ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Genetic Background ◽  
Yellow River ◽  
Demographic History ◽  
Population Decline ◽  
Mountain Range ◽  
Population Demography ◽  
High Genetic Diversity ◽  
Nuclear Microsatellite ◽  
Over Exploitation

Tetraena mongolica Maxim (Zygophyllaceae) is an endangered species endemic to western Inner Mongolia and China, and is currently threatened by habitat loss and human over-exploitation. We explored the genetic background, its genetic diversity, population structure, and demographic history, based on 12 polymorphic nuclear microsatellite loci. Our results indicated high genetic diversity in extant populations, but no distinguishable gene cluster corresponding with a specific biogeography. Population demography analysis using a MSVAR indicated a strong, recent population decline approximately 5,455 years ago. These results suggest that the Yellow River and Zhuozi Mountain range may not prevent pollination between populations. Finally, we surmised that the population demography of T. mongolica was likely to have been affected by early mankind activities.

scholarly journals Genetic assessment reveals no population substructure and divergent regional and sex-specific histories in the Chachapoyas from northeast Peru

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244497
Author(s):  
Evelyn K. Guevara ◽  
Jukka U. Palo ◽  
Sanni Översti ◽  
Jonathan L. King ◽  
Maria Seidel ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
Demographic History ◽  
Population Decline ◽  
Population Substructure ◽  
Gene Pools ◽  
Population Declines ◽  
Montane Forests ◽  
High Genetic Diversity ◽  
Spanish Conquest

Many native populations in South America have been severely impacted by two relatively recent historical events, the Inca and the Spanish conquest. However decisive these disruptive events may have been, the populations and their gene pools have been shaped markedly also by the history prior to the conquests. This study focuses mainly on the Chachapoya peoples that inhabit the montane forests on the eastern slopes of the northern Peruvian Andes, but also includes three distinct neighboring populations (the Jívaro, the Huancas and the Cajamarca). By assessing mitochondrial, Y-chromosomal and autosomal diversity in the region, we explore questions that have emerged from archaeological and historical studies of the regional culture (s). These studies have shown, among others, that Chachapoyas was a crossroads for Coast-Andes-Amazon interactions since very early times. In this study, we examine the following questions: 1) was there pre-Hispanic genetic population substructure in the Chachapoyas sample? 2) did the Spanish conquest cause a more severe population decline on Chachapoyan males than on females? 3) can we detect different patterns of European gene flow in the Chachapoyas region? and, 4) did the demographic history in the Chachapoyas resemble the one from the Andean area? Despite cultural differences within the Chachapoyas region as shown by archaeological and ethnohistorical research, genetic markers show no significant evidence for past or current population substructure, although an Amazonian gene flow dynamic in the northern part of this territory is suggested. The data also indicates a bottleneck c. 25 generations ago that was more severe among males than females, as well as divergent population histories for populations in the Andean and Amazonian regions. In line with previous studies, we observe high genetic diversity in the Chachapoyas, despite the documented dramatic population declines. The diverse topography and great biodiversity of the northeastern Peruvian montane forests are potential contributing agents in shaping and maintaining the high genetic diversity in the Chachapoyas region.

Genetic discontinuities and abundant historical gene flow in wild lotus Nelumbo nucifera populations from the Yangtze River

2019 ◽  
Vol 158 ◽  
pp. 103130 ◽  
Author(s):  
Yuan-Yuan Chen ◽  
Wu-Chao Wang ◽  
Xiang-Rong Fan ◽  
Jun-Yao Sun ◽  
Wei Li ◽  
...  
Keyword(s):  
Gene Flow ◽  
Yangtze River ◽  
Nelumbo Nucifera ◽  
The Yangtze River

Yiling Multi-span Cable-Stayed Bridge over the Yangtze River

2004 ◽  
Vol 88 (8) ◽  
pp. 59-64
Author(s):  
Changyu Shao ◽  
Qinger Deng
Keyword(s):  
Yangtze River ◽  
The Yangtze River ◽  
Cable Stayed Bridge

Composition and changes in abundance and biomass of fish assemblages along the Jingjiang section of the Yangtze River over the last decade

2014 ◽  
Vol 21 (6) ◽  
pp. 688-698
Author(s):  
Sun Shasha ◽  
Tang Wenqiao ◽  
Guo Hongyi ◽  
Li Huihua ◽  
Liu Dong ◽  
...  
Keyword(s):  
Yangtze River ◽  
Fish Assemblages ◽  
The Yangtze River
Sign in / Sign up

Export Citation Format

Share Document