scholarly journals Continental-scale assessment of genetic diversity and population structure in quaking aspen (Populus tremuloides )

2013 ◽  
Vol 40 (9) ◽  
pp. 1780-1791 ◽  
Author(s):  
Colin M. Callahan ◽  
Carol A. Rowe ◽  
Ronald J. Ryel ◽  
John D. Shaw ◽  
Michael D. Madritch ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Populus Tremuloides ◽  
Quaking Aspen ◽  
Continental Scale ◽  
Scale Assessment

Cytotype differences in radial increment provide novel insight into aspen reproductive ecology and stand dynamics

2015 ◽  
Vol 45 (1) ◽  
pp. 1-8 ◽  
Author(s):  
R. Justin DeRose ◽  
Karen E. Mock ◽  
James N. Long
Keyword(s):  
Genetic Diversity ◽  
Populus Tremuloides ◽  
Ring Width ◽  
Stand Development ◽  
Quaking Aspen ◽  
Radial Increment ◽  
Management Actions ◽  
Tree Ring Data ◽  
Development Processes ◽  
Insight Into

High rates of triploidy have recently been described in quaking aspen (Populus tremuloides Michx.) of the Intermountain West, raising questions about the contributions of triploidy to stand persistence and dynamics. In this study, we investigated cytotype differences between diploid and triploid aspen clones using dendrochronological techniques. We used tree-ring data collected from stems within an aspen stand near Fish Lake, Utah, to test for differences in stem age, population structure, growth, and response to climate. This stand contains the well-known Pando clone, which is purported to be the largest organism documented on earth. Our results show that triploid aspen stems grew more rapidly than diploids, and that this difference was most pronounced early in stand development. Growth response to climate varied little between triploids and diploids, where wide rings were associated with cool, moist years, and narrow rings were associated with above-average growing season temperatures. Stand development processes and inherent genetic differences are mechanisms possibly controlling the observed differences in aspen ring width between triploids and diploids. Regardless of the mechanism, the results have specific management implications. Conventional regeneration methods involving coppicing and the associated intermediate treatments will promote asexually reproducing triploids, leading to static or reduced genetic diversity. Enhanced genetic diversity will be favored by management actions that explicitly account for (i) the potential existence of multiple cytotypes within a stand and (ii) the observed differences in growth rates between diploid and triploid individuals.

Changing perspectives on regeneration ecology and genetic diversity in western quaking aspen: implications for silviculture

2012 ◽  
Vol 42 (12) ◽  
pp. 2011-2021 ◽  
Author(s):  
James N. Long ◽  
Karen Mock
Keyword(s):  
Genetic Diversity ◽  
Populus Tremuloides ◽  
Stand Development ◽  
Quaking Aspen ◽  
Conventional View ◽  
High Severity ◽  
Low Expectations ◽  
Recent Developments ◽  
Regeneration Ecology ◽  
Silvicultural Practice

A conventional view of regeneration ecology of quaking aspen ( Populus tremuloides Michx.) in western North American holds that reproduction is strictly vegetative and, except on some marginal sites, only successful following high-severity disturbance. This view has strongly influenced silvicultural treatment of western aspen and has led to low expectations concerning genetic diversity of stands and landscapes. However, recent discoveries are fundamentally altering our understanding of western aspen regeneration ecology and genetics. For example, there are clearly multiple pathways of aspen regeneration and stand development. Research on a variety of fronts indicates that seedling establishment is common enough to be ecologically important and that genetic diversity is substantially greater than previously thought. We review conventional understanding of western aspen and put this into the context of silvicultural practice. We then review recent developments in aspen research and assess the silvicultural implications of these insights.

Genetic diversity and population structure of Populus yunnanensis revealed by SSR markers

2020 ◽  
Vol 52 (6) ◽  
Author(s):  
Anpei Zhou ◽  
Dan Zong ◽  
Peihua Gan ◽  
Yao Zhang ◽  
Dan Li ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Ssr Markers

Genetic diversity and population structure of Bretschneidera sinensis, an endangered species

2014 ◽  
Vol 21 (6) ◽  
pp. 723-731
Author(s):  
Xu Gangbiao ◽  
Liang Yan ◽  
Jiang Yan ◽  
Liu Xiongsheng ◽  
Hu Shangli ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Endangered Species

EST-SSR Genetic Diversity and Population Structure of Tea Landraces and Developed Cultivars (Lines) in Zhejiang Province, China

2010 ◽  
Vol 36 (5) ◽  
pp. 744-753 ◽  
Author(s):  
Ting-Ting QIAO ◽  
Chun-Lei MA ◽  
Yan-Hua ZHOU ◽  
Ming-Zhe YAO ◽  
Rao LIU ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Zhejiang Province

Genetic Diversity and Population Structure of Germplasm Resources in Sesame (Sesamum indicum L.) by SSR Markers

2013 ◽  
Vol 38 (12) ◽  
pp. 2286-2296 ◽  
Author(s):  
Wen-Di YUE ◽  
Li-Bin WEI ◽  
Ti-De ZHANG ◽  
Chun LI ◽  
Hong-Mei MIAO ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Ssr Markers ◽  
Sesamum Indicum ◽  
Germplasm Resources
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