Spatial distribution of flower colour polymorphism in Iris lutescens Eric Imbert To cite this version: Eric Imbert. Spatial distribution of flower colour polymorphism in Iris lutescens. Botany Letters, Taylor & Francis, In press, 10.1080/23818107.2020.1833750. hal-02958925 HAL Id: hal-02958925 https://hal.archives-ouvertes.fr/hal-02958925 Submitted on 6 Oct 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Title : Geographical distribution of flower colour polymorphism in Iris lutescens Author: Eric Imbert Address : ISEM, University of Montpellier – Montpellier, France
[email protected] Accepté pour publication Botany Letters https://doi.org/10.1080/23818107.2020.1833750 Abstract Iris lutescens is a common species occurring mainly in dry limestone habitats in Western Italy, Southern France and Spain. The species shows a remarkable polymorphism for flower colour, and yellow and purple flowers can be found in the same population. As the species is a deceptive one, the previous studies on the maintenance of such a polymorphism were linked to its pollination ecology. Here, I reported on the spatial distribution of the polymorphism, and showed that Spanish populations are mostly purple monomorphic. In contrast, populations in the South of France and Italy show the complete range, from 0 to 1, for the frequency of yellow morph, and the spatial autocorrelation for morph frequencies is very low.