scholarly journals Variable inbreeding depression may explain associations between the mating system and herbicide resistance in the common morning glory

2021 ◽  
Author(s):  
Megan L. Van Etten ◽  
Anah Soble ◽  
Regina S. Baucom
Keyword(s):  
Mating System ◽  
Inbreeding Depression ◽  
Herbicide Resistance ◽  
Morning Glory ◽  
The Common

scholarly journals Fitness costs of herbicide resistance across natural populations of the common morning glory, Ipomoea purpurea

Evolution ◽  
2016 ◽  
Vol 70 (10) ◽  
pp. 2199-2210 ◽  
Author(s):  
Megan L. Van Etten ◽  
Adam Kuester ◽  
Shu-Mei Chang ◽  
Regina S. Baucom
Keyword(s):  
Herbicide Resistance ◽  
Natural Populations ◽  
Morning Glory ◽  
Fitness Costs ◽  
Ipomoea Purpurea ◽  
The Common

scholarly journals Environmental influences on the mating system of the common morning glory

2017 ◽  
Author(s):  
D. F. Alvarado-Serrano ◽  
S-M. Chang ◽  
R. S Baucom
Keyword(s):  
Environmental Factors ◽  
Mating System ◽  
Population Level ◽  
Mating Strategies ◽  
Morning Glory ◽  
Life History Trait ◽  
Mixed Mating ◽  
Model Free ◽  
System Components ◽  
The Common

ABSTRACTThe balance between selfing and outcrossing is a life history trait of major concern with deep evolutionary consequences in mixed mating species. Yet, our current understanding of the proximate and ultimate determinants of species’ mating system is still unsatisfactory and largely theoretical. Indeed, evolutionary biologists are still puzzled by the often dramatic variation of mating strategies within single species. Of particular concern is the extent to which environmental conditions shape patterns of variation and covariation of mating system components within species. Here, we address this concern in the common morning glory (Ipomoea purpurea) by taking advantage of an extensive dataset of floral traits, genetic estimates of selfing and inbreeding, and relevant environmental factors compiled for 22 populations of this species distributed along a disparate set of environments along Southeast and Midwest USA. Combining a powerful array of parametric and model-free statistical approaches, we robustly identify a set of natural and anthropogenic environmental factors underlying population-level variation in selfing, inbreeding, and flower morphology. Remarkably, individual mating system components are found to be associated with different environmental factors and only loosely associated with each other, and thus potentially under multiple different selective pressures. These results not only corroborate theoretical expectations of the significant role the environment plays in the local determination of mating systems, but also provide compelling evidence of complex underlying interactions between multiple evolutionary processes.

scholarly journals Natural and Anthropogenic Influences on the Mating System of the Common Morning Glory

2017 ◽  
Vol 109 (2) ◽  
pp. 126-137 ◽  
Author(s):  
Diego F Alvarado-Serrano ◽  
Shu-Mei Chang ◽  
Regina S Baucom
Keyword(s):  
Mating System ◽  
Morning Glory ◽  
Anthropogenic Influences ◽  
The Common

scholarly journals Variable inbreeding depression may explain associations between the mating system and herbicide resistance

2020 ◽  
Author(s):  
Megan Van Etten ◽  
Anah Soble ◽  
Regina S Baucom
Keyword(s):  
Gene Expression ◽  
Environmental Stress ◽  
Mating System ◽  
Inbreeding Depression ◽  
Herbicide Resistance ◽  
Breeding System ◽  
Resistance Breeding ◽  
Outbreeding Depression ◽  
Ipomoea Purpurea ◽  
Transcriptome Level

AbstractInbreeding depression is a central parameter underlying mating system variation in nature and one that can be altered by environmental stress. Although a variety of systems show that inbreeding depression tends to increase under stressful conditions, we have very little understanding across most organisms how the level of inbreeding depression may change as a result of adaptation to stressors. In this work we examined the potential that inbreeding depression varied among lineages of Ipomoea purpurea artificially evolved to exhibit divergent levels of herbicide resistance. We examined inbreeding depression in a variety of fitness-related traits in both the growth chamber and in the field. We paired our examination of inbreeding depression in fitness-related traits with an examination of gene expression changes associated with the level of herbicide resistance, breeding history (inbred or outcrossed), and the interaction of the breeding system and the level of herbicide resistance. We found that, while inbreeding depression was present across many of the traits, lineages artificially selected for increased herbicide resistance often showed no evidence of inbreeding depression in the presence of herbicide, and in fact, showed evidence of outbreeding depression in some traits compared to non-selected control lines and lineages selected for increased herbicide susceptibility. Further, at the transcriptome level, the resistant selection lines had differing patterns of gene expression according to breeding type (inbred vs outcrossed) compared to the control and susceptible selection lines. Our data together indicate that inbreeding depression may be lessened in populations that are adapting to regimes of strong selection.

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