Experimental Evidence That Selection Favors Character Displacement in the Ivyleaf Morning Glory
نویسندگان
چکیده
منابع مشابه
Experimental evidence that selection favors character displacement in the ivyleaf morning glory.
While there is abundant evidence to suggest that pollinators influence the evolution of plant floral traits, there is little direct evidence that interactions between plant species shape the evolution of such characteristics. The purpose of this study was to determine whether the presence of the morning glory Ipomoea purpurea alters patterns of selection on floral traits of its congener, Ipomoe...
متن کاملSelection for character displacement is constrained by the genetic architecture of floral traits in the ivyleaf morning glory.
Evolutionary theory predicts that interactions between species such as resource competition or reproductive interference will generate selection for character displacement where similar species co-occur. However, the rate and direction of character displacement will depend not only on the strength of selection for trait divergence, but also on the amount of genetic variation for selected traits...
متن کاملNatural selection on a leaf-shape polymorphism in the ivyleaf morning glory (Ipomoea hederacea).
Leaf shape is one of the most variable plant traits. Previous work has provided much indirect evidence that leaf-shape variation is adaptive and that leaf shape influences thermoregulation, water balance, and resistance to natural enemies. Nevertheless, there is little direct evidence that leaf shape actually affects plant fitness. In this study, we first demonstrate that populations of the ivy...
متن کاملDiffuse selection on resistance to deer herbivory in the ivyleaf morning glory, Ipomoea hederacea.
Recent work defines coevolution between plants and herbivores as pairwise when the pattern of selection on resistance traits and the response to selection are both independent of the presence or absence of other herbivores. In addition, for a pairwise response to selection, resistance to a focal herbivore must have the same genetic basis in the presence and absence of other herbivores. None of ...
متن کاملNatural selection maintains a single-locus leaf shape cline in Ivyleaf morning glory, Ipomoea hederacea.
Clines in phenotypic traits with an underlying genetic basis potentially implicate natural selection. However, neutral evolutionary processes such as random colonization, spatially restricted gene flow, and genetic drift could also result in similar spatial patterns, especially for single-locus traits because of their susceptibility to stochastic events. One way to distinguish between adaptive ...
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 2008
ISSN: 0003-0147,1537-5323
DOI: 10.1086/523948