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.
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
