Genetic variation in plant populations: assessing cause and pattern.

2009 ◽  
pp. 139-164 ◽  
Author(s):  
D. J. Coates ◽  
M. Byrne
Keyword(s):  
Genetic Variation ◽  
Plant Populations

scholarly journals Quantitative-genetic variation in morphological and physiological traits within a quaking aspen (Populus tremuloides) population

2008 ◽  
Vol 38 (6) ◽  
pp. 1690-1694 ◽  
Author(s):  
Megan K. Kanaga ◽  
Ronald J. Ryel ◽  
Karen E. Mock ◽  
Michael E. Pfrender
Keyword(s):  
Genetic Variation ◽  
Populus Tremuloides ◽  
Common Garden ◽  
Quaking Aspen ◽  
Common Garden Experiment ◽  
Plant Populations ◽  
Phenotypic Differences ◽  
Quantitative Genetic ◽  
Morphological And Physiological Traits ◽  
Populus Species

Genetic diversity within populations is an important component of adaptive evolution, and recent research has demonstrated that genetic variation within plant populations can have important ecological effects. In this study, we investigate quantitative-genetic variation in several traits within a quaking aspen ( Populus tremuloides Michx.) population. A common garden experiment was planted with replicates of 13 aspen genotypes collected from wet and dry sites within a population in southern Utah, USA. Ten growth, leaf, physiological, and structural traits were measured. There were significant, heritable phenotypic differences among genotypes in every measured trait and differences in 4 of the 10 traits among genotypes originating from wet and dry collection sites. The data were compared with other published studies, showing that aspen heritability (H2) estimates and coefficients of genetic variation (CVG) were comparable or higher than other Populus species and hybrid F1 Populus genotypes, indicating a large amount of quantitative-genetic variation in aspen.

scholarly journals Using soil seed banks to assess temporal patterns of genetic variation in invasive plant populations

2014 ◽  
Vol 4 (9) ◽  
pp. 1648-1658 ◽  
Author(s):  
Mark Fennell ◽  
Tommy Gallagher ◽  
Luis Leon Vintro ◽  
Bruce Osborne
Keyword(s):  
Genetic Variation ◽  
Invasive Plant ◽  
Temporal Patterns ◽  
Seed Banks ◽  
Plant Populations ◽  
Soil Seed Banks

Genetic Variability for Herbicide Reaction in Plant Populations

Weed Science ◽  
1983 ◽  
Vol 31 (5) ◽  
pp. 652-657 ◽  
Author(s):  
Steven C. Price ◽  
James E. Hill ◽  
R. W. Allard
Keyword(s):  
Genetic Variation ◽  
Genetic Variability ◽  
Analysis Of Variance ◽  
Genetic Variance ◽  
Natural Populations ◽  
Herbicide Tolerance ◽  
Avena Fatua ◽  
Wild Oat ◽  
Plant Populations ◽  
Avena Barbata

The level of genetic variation for tolerance to herbicides was quantified in populations of slender wild oat (Avena barbata Brott. # AVEBA), wild oat (Avena fatua L. # AVEFA), and godetia (Clarkia williamsonii Lewis & Lewis) that had not been previously exposed to herbicides. Seedlings of wild oat and godetia were treated with barban (4-chloro-2-butynl-m-chlorocarbanilate) and bromoxynil (3,5-dibromo-4-hydroxybenzonitrile), respectively. The plants were rated for phytotoxic effects following treatment. A one-way analysis of variance on arcsin-transformed phytotoxicity ratings showed significant amounts of inter- and intrapopulation variability for herbicide reaction. Furthermore, the amount of genetic variance for herbicide reaction is higher than expected on the basis of mutation alone, suggesting selection favoring genes conferring herbicide tolerance occurs in natural populations.

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