Show simple item record Wadgymar, Susana M Daws, S. Caroline Anderson, Jill 2017-04-27T13:45:48Z 2017-04-27T13:45:48Z 2017-05-03
dc.identifier doi:10.5061/dryad.tr05q
dc.identifier.citation Wadgymar SM, Daws SC, Anderson JT (2017) Integrating viability and fecundity selection to illuminate the adaptive nature of genetic clines. Evolution Letters 1(1): 26-39.
dc.identifier.issn 2056-3744
dc.description Genetically-based trait variation across environmental gradients can reflect adaptation to local environments. However, natural populations that appear well-adapted often exhibit directional, not stabilizing, selection on ecologically-relevant traits. Temporal variation in the direction of selection could lead to stabilizing selection across multiple episodes of selection, which might be overlooked in short-term studies that evaluate relationships of traits and fitness under only one set of conditions. Furthermore, non-random mortality prior to trait expression can bias inferences about trait evolution if viability selection opposes fecundity selection. Here, we leveraged fitness and trait data to test whether phenotypic clines are genetically based and adaptive, whether temporal variation in climate imposes stabilizing selection, and whether viability selection acts on adult phenotypes. We monitored transplants of the subalpine perennial forb, Boechera stricta (Brassicaceae), in common gardens at two elevations over 2-3 years that differed in drought intensity, quantifying viability and fecundity fitness components for four heritable traits: specific leaf area, integrated water-use efficiency, height at first flower, and flowering phenology. Our results indicate that genetic clines are maintained by selection, but their expression is context dependent, as they do not emerge in all environments. Moreover, selection varied spatially and temporally. Stabilizing selection was most pronounced when we integrated data across years. Finally, viability selection prior to trait expression targeted adult phenotypes (age and size at flowering). Indeed, viability selection for delayed flowering opposed fecundity selection for accelerated flowering, demonstrating that neglecting to account for viability selection could lead to inaccurate conclusions that populations are maladapted. Our results suggest that reconciling clinal trait variation with selection requires data collected across multiple spatial scales, time frames, and life history stages.
dc.relation.haspart doi:10.5061/dryad.tr05q/1
dc.relation.isreferencedby doi:10.1002/evl3.3
dc.subject elevational gradient
dc.subject flowering phenology
dc.subject invisible fraction
dc.subject stabilizing selection
dc.subject specific leaf area
dc.subject water use efficiency
dc.title Data from: Integrating viability and fecundity selection to illuminate the adaptive nature of genetic clines
dc.type Article
dwc.ScientificName Boechera stricta
dc.contributor.correspondingAuthor Anderson, Jill
prism.publicationName Evolution Letters

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Title Wadgymar_et_al_Evolution_Letters
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Description This zip file contains the data files associated with all figures and analyses in the manuscript by Wadgymar et. al entitled "Integrating viability and fecundity selection to illuminate the adaptive nature of genetic clines", Evolution Letters. We also include the R-scripts necessary to produce all Aster analyses. A ReadMe file describes the contents of all data files.
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