ArticleAnnals of botany2016
Neutral processes contribute to patterns of spatial variation for flower colour in the Mediterranean Iris lutescens (Iridaceae).
Article in Annals of botany, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 25 citations in OpenAlex.
- Flower colour polymorphism inAoB PLANTS · 2026Article
- The roles of florivory and herbivory in maintaining intra-population flower colour variation in Anemone coronaria.Plant biology (Stuttgart, Germany) · 2025Article
- Reproductive strategies of two color morphs ofFrontiers in plant science · 2025Article
- Pollinators do not avoid or prefer a locally rare pollen colour morph inmicroPublication biology · 2025Article
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- Geographic Mosaics of Fly Pollinators With Divergent Color Preferences Drive Landscape-Scale Structuring of Flower Color in Daisy Communities.Frontiers in plant science · 2021Article
- Genome Size Evolution and Dynamics inPlants (Basel, Switzerland) · 2020Article
- Flower Colour Polymorphism, Pollination Modes, Breeding System and Gene Flow inPlants (Basel, Switzerland) · 2020Article
- All the Colors of the Rainbow: Diversification of Flower Color and Intraspecific Color Variation in the GenusFrontiers in plant science · 2020Article
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5 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsFlower colour polymorphism in plants has been used as a classic model for understanding the importance of neutral processes vs. natural selection in population differentiation. However, current explanations for the maintenance of flower colour polymorphism mainly rely on balancing selection, while neutral processes have seldom been championed. Iris lutescens (Iridaceae) is a widespread species in the northern Mediterranean basin, which shows a stable and striking purple-yellow flower colour polymorphism. To evaluate the roles of neutral processes in the spatial variation for flower colour in this species, patterns of neutral genetic variation across its distribution range were quantified, and phenotypic differentiation was compared with neutral genetic differentiation.
methodsGenetic diversity levels and population genetic structure were investigated through the genotyping of a collection of 1120 individuals in 41 populations ranging from Spain to France, using a set of eight newly developed microsatellite markers. In addition, phenotypic differentiation for flower colour was also quantified by counting colour morph frequency in each population, and measuring the reflectance spectra of sampled individuals. KEY
resultsPopulations in Spain present a sharp colour transition from solely purple to solely yellow. The results provide evidence that genetic drift through limited gene flow is important in the evolution of monomorphic populations. In contrast, most populations in France are polymorphic with both phenotypes, and the colour frequencies vary geographically without any spatial gradients observed. A pattern of isolation by distance is detected in France, and gene flow between adjacent populations seems to be an important factor maintaining populations polymorphic.
conclusionsOverall, neutral processes contribute to patterns of spatial variation for flower colour in I. lutescens, but it cannot be excluded that natural selection is also operating. An interaction between neutral processes and natural selection is suggested to explain the spatial variation for flower colour in I. lutescens.
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