Candidate gene polymorphisms for behavioural adaptations during urbanization in blackbirds |
| |
Authors: | J. C. Mueller J. Partecke B. J. Hatchwell K. J. Gaston K. L. Evans |
| |
Affiliation: | 1. Department of Behavioural Ecology & Evolutionary Genetics, Max Planck Institute for Ornithology, , Seewiesen, Germany;2. Department of Migration and Immuno‐Ecology, Max Planck Institute for Ornithology, , Radolfzell, Germany;3. University of Konstanz, , Konstanz, Germany;4. Department of Animal and Plant Sciences, University of Sheffield, , Sheffield, UK;5. Environment and Sustainability, Institute, University of Exeter, , Penryn, Cornwall, UK |
| |
Abstract: | Successful urban colonization by formerly rural species represents an ideal situation in which to study adaptation to novel environments. We address this issue using candidate genes for behavioural traits that are expected to play a role in such colonization events. We identified and genotyped 16 polymorphisms in candidate genes for circadian rhythms, harm avoidance and migratory and exploratory behaviour in 12 paired urban and rural populations of the blackbird Turdus merula across the Western Palaearctic. An exonic microsatellite in the SERT gene, a candidate gene for harm avoidance behaviour, exhibited a highly significant association with habitat type in an analysis conducted across all populations. Genetic divergence at this locus was consistent in 10 of the 12 population pairs; this contrasts with previously reported stochastic genetic divergence between these populations at random markers. Our results indicate that behavioural traits related to harm avoidance and associated with the SERT polymorphism experience selection pressures during most blackbird urbanization events. These events thus appear to be influenced by homogeneous adaptive processes in addition to previously reported demographic founder events. |
| |
Keywords: |
AANAT
ADCYAP1
CLOCK
clock genes
CREB1
DRD4
invasion migration
NPAS2
personality traits |
|
|