Evolutionary Paths Underlying Flower Color Variation in Antirrhinum

Whibley, Annabel C., Langlade, Nicholas B., Andalo, Christophe, Hanna, Andrew I., Bangham, Andrew, Thébaud, Christophe and Coen, Enrico (2006) Evolutionary Paths Underlying Flower Color Variation in Antirrhinum. Science, 313 (5789). 963 - 966. ISSN 0036-8075

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To understand evolutionary paths connecting diverse biological forms, we defined a three-dimensional genotypic space separating two flower color morphs of Antirrhinum. A hybrid zone between morphs showed a steep cline specifically at genes controlling flower color differences, indicating that these loci are under selection. Antirrhinum species with diverse floral phenotypes formed a U-shaped cloud within the genotypic space. We propose that this cloud defines an evolutionary path that allows flower color to evolve while circumventing less-adaptive regions. Hybridization between morphs located in different arms of the U-shaped path yields low-fitness genotypes, accounting for the observed steep clines at hybrid zones.

Item Type: Article
Faculty \ School: Faculty of Science > School of Computing Sciences
Depositing User: Vishal Gautam
Date Deposited: 09 Mar 2011 09:00
Last Modified: 24 Oct 2022 01:37
URI: https://ueaeprints.uea.ac.uk/id/eprint/23769
DOI: 10.1126/science.1129161

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