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Continent-Wide Climatic Variation Drives Local Adaptation in North American White Clover.
Wright, Sara J; Cui Zhou, Daniel; Kuhle, Amy; Olsen, Kenneth M.
Afiliação
  • Wright SJ; Department of Biology, Washington University, St. Louis, MO 63130-4899.
  • Cui Zhou D; Department of Biology, Washington University, St. Louis, MO 63130-4899.
  • Kuhle A; Quincy University, Quincy, IL.
  • Olsen KM; Department of Biology, Washington University, St. Louis, MO 63130-4899.
J Hered ; 109(1): 78-89, 2017 12 21.
Article em En | MEDLINE | ID: mdl-28992131
Climate-associated clines in adaptive polymorphisms are commonly cited as evidence of local adaptation within species. However, the contribution of the clinally varying trait to overall fitness is often unknown. To address this question, we examined survival, vegetative growth, and reproductive output in a central US common garden experiment using 161 genotypes of white clover (Trifolium repens L.) originating from 15 locations across North America. White clover is polymorphic for cyanogenesis (hydrogen cyanide release upon tissue damage), a chemical defense against generalist herbivores, and climate-associated cyanogenesis clines have repeatedly evolved across the species range. Over a 12-month experiment, we observed striking correlations between the population of origin and plant performance in the common garden, with climatic distance from the common garden site predicting fitness more accurately than geographic distance. Assessments of herbivore leaf damage over the 2015 growing season indicated marginally lower herbivory on cyanogenic plants; however, this effect did not result in increased fitness in the common garden location. Linear mixed modeling suggested that while cyanogenesis variation had little predictive value for vegetative growth, it is as important as climatic variation for predicting reproductive output in the central United States. Together, our findings suggest that knowledge of climate similarity, as well as knowledge of locally favored adaptive traits, will help to inform transplantation strategies for restoration ecology and other conservation efforts in the face of climate change.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Mudança Climática / Adaptação Fisiológica / Trifolium / Genética Populacional Tipo de estudo: Prognostic_studies País/Região como assunto: America do norte Idioma: En Ano de publicação: 2017 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Mudança Climática / Adaptação Fisiológica / Trifolium / Genética Populacional Tipo de estudo: Prognostic_studies País/Região como assunto: America do norte Idioma: En Ano de publicação: 2017 Tipo de documento: Article