title: Comment on "Evolutionary paths underlying flower color variation in Antirrhinum".
abstract: 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.
authors.affiliation: Department of Biology, Duke University, Box 90338, Durham, NC 27708, USA. mrausher@duke.edu
authors.forename: Mark D
authors.initials: MD
authors.lastname: Rausher
mesh_terms: D000220:Adaptation, Biological; D032161:Antirrhinum / Q000145:classification / Q000235:genetics*; D005075:Biological Evolution; D035264:Flowers / Q000235:genetics*; D049810:Genetic Speciation; D005838:Genotype; D006824:Hybridization, Genetic; D010641:Phenotype; D010858:Pigmentation / Q000235:genetics*; D012641:Selection, Genetic