Adaptive genetic potential and plasticity of trait variation in the foundation prairie grass Andropogon gerardii across the US Great Plains’ climate gradient: Implications for climate change and restoration
Autor: | Hannah M. Tetreault, Jesse Poland, Johnny Bryant, Matthew Galliart, Jake Alsdurf, Paul St. Amand, Natalie C. Unruh, Mary Knapp, Brian R. Maricle, Olivia Parrish, Nora M. Bello, Loretta C. Johnson, Sara G. Baer, Sofia Sabates, David J. Gibson, Angel DeLaCruz |
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Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
0106 biological sciences
0301 basic medicine Canopy lcsh:Evolution drought Biology precipitation 010603 evolutionary biology 01 natural sciences reciprocal gardens 03 medical and health sciences ecotypic variation Great Plains grasslands lcsh:QH359-425 Genetics Ecology Evolution Behavior and Systematics Local adaptation Biomass (ecology) Phenotypic plasticity Ecotype Ecology Andropogon food and beverages Original Articles phenotypic variation biology.organism_classification 030104 developmental biology Ecotypic variation genome–environment interaction Original Article genetic differentiation Adaptation General Agricultural and Biological Sciences local adaptation |
Zdroj: | Evolutionary Applications Evolutionary Applications, Vol 13, Iss 9, Pp 2333-2356 (2020) |
ISSN: | 1752-4571 |
Popis: | Plant response to climate depends on a species’ adaptive potential. To address this, we used reciprocal gardens to detect genetic and environmental plasticity effects on phenotypic variation and combined with genetic analyses. Four reciprocal garden sites were planted with three regional ecotypes of Andropogon gerardii, a dominant Great Plains prairie grass, using dry, mesic, and wet ecotypes originating from western KS to Illinois that span 500–1,200 mm rainfall/year. We aimed to answer: (a) What is the relative role of genetic constraints and phenotypic plasticity in controlling phenotypes? (b) When planted in the homesite, is there a trait syndrome for each ecotype? (c) How are genotypes and phenotypes structured by climate? and (d) What are implications of these results for response to climate change and use of ecotypes for restoration? Surprisingly, we did not detect consistent local adaptation. Rather, we detected co‐gradient variation primarily for most vegetative responses. All ecotypes were stunted in western KS. Eastward, the wet ecotype was increasingly robust relative to other ecotypes. In contrast, fitness showed evidence for local adaptation in wet and dry ecotypes with wet and mesic ecotypes producing little seed in western KS. Earlier flowering time in the dry ecotype suggests adaptation to end of season drought. Considering ecotype traits in homesite, the dry ecotype was characterized by reduced canopy area and diameter, short plants, and low vegetative biomass and putatively adapted to water limitation. The wet ecotype was robust, tall with high biomass, and wide leaves putatively adapted for the highly competitive, light‐limited Eastern Great Plains. Ecotype differentiation was supported by random forest classification and PCA. We detected genetic differentiation and outlier genes associated with primarily precipitation. We identified candidate gene GA1 for which allele frequency associated with plant height. Sourcing of climate adapted ecotypes should be considered for restoration. |
Databáze: | OpenAIRE |
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