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Science 26 January 2007:
Vol. 315. no. 5811, p. 461
DOI: 10.1126/science.1136394
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Technical Comments

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

Annabel C. Whibley,1 Nicolas B. Langlade,1 Christophe Andalo,2 Andrew I. Hanna,3 Andrew Bangham,3 Christophe Thébaud,2 Enrico Coen1*

Rausher's assertion that divergent selection across a hybrid zone is incompatible with adaptive ridges, although intuitively reasonable, is incorrect on several fronts. His alternative hypothesis of a single moveable peak predicts a sharp environmental transition across the hybrid zone that is not supported by observations. Thus, a high fitness path still provides the most straightforward explanation of our data.

1 Department of Cell and Developmental Biology, John Innes Centre, Colney Lane, Norwich NR4 7UH, UK.
2 Laboratoire Evolution et Diversité Biologique, UMR 5174 CNRS–Université Paul Sabatier, 31062 Toulouse Cédex 9, France.
3 School of Computing Sciences, University of East Anglia, Earlham Road, Norwich NR4 7TJ, UK.

* To whom correspondence should be addressed. E-mail: enrico.coen{at}bbsrc.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)