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Abstract Determining the patterns and mechanisms of natural selection in the wild is of fundamental importance to understanding the differentiation of populations and the evolution of new species. However, it is often unknown the extent to which adaptive genetic variation is distributed among ecotyp...

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Veröffentlicht in:The American Naturalist. - University of Chicago Press. - 183(2014), 5, Seite 682-692
1. Verfasser: Lowry, David B. (VerfasserIn)
Weitere Verfasser: Behrman, Kathrine D., Grabowski, Paul, Morris, Geoffrey P., Kiniry, James R., Juenger, Thomas E.
Format: Online-Aufsatz
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:The American Naturalist
Schlagworte:ecotype cline local adaptation reciprocal transplant switchgrass population structure Physical sciences Biological sciences Social sciences
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500 |a * This paper was originally presented at the Vice Presidential Symposium at the American Society of Naturalists annual meetings in Ottawa, Ontario, in July 2012. † Corresponding author; e-mail: davidbryantlowrygmail.com . 
520 |a Abstract Determining the patterns and mechanisms of natural selection in the wild is of fundamental importance to understanding the differentiation of populations and the evolution of new species. However, it is often unknown the extent to which adaptive genetic variation is distributed among ecotypes between distinct habitats versus along large-scale geographic environmental gradients, such as those that track latitude. Classic studies of selection in the wild in switchgrass, Panicum virgatum, tested for adaptation at both of these levels of natural variation. Here we review what these field experiments and modern agronomic field trials have taught us about natural variation and selection at both the ecotype and environmental gradient levels in P. virgatum. With recent genome sequencing efforts in P. virgatum, it is poised to become an excellent system for understanding the adaptation of grassland species across the eastern half of North America. The identification of genetic loci involved in different types of adaptations will help to understand the evolutionary mechanisms of diversification within P. virgatum and provide useful information for the breeding of high-yielding cultivars for different ecoregions. 
540 |a © 2014 by The University of Chicago. All rights reserved. 
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700 1 |a Grabowski, Paul  |e verfasserin  |4 aut 
700 1 |a Morris, Geoffrey P.  |e verfasserin  |4 aut 
700 1 |a Kiniry, James R.  |e verfasserin  |4 aut 
700 1 |a Juenger, Thomas E.  |e verfasserin  |4 aut 
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