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Comment on "Evolutionary Paths Underlying Flower Color Variation in Antirrhinum"

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Science  26 Jan 2007:
Vol. 315, Issue 5811, pp. 461
DOI: 10.1126/science.1136073

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Although Whibley et al. (Reports, 18 August 2006, p. 963) argue for the presence of high-fitness ridges in the Antirrhinum floral-color adaptive landscape, their data are equally compatible with adaptive landscapes having a single peak and no ridges. Their demonstration of divergent selection across a hybrid zone argues against the presence of adaptive ridges.

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