Local Adaptation at the Transcriptome Level in Brown Trout: Evidence from Early Life History Temperature Genomic Reaction Norms

摘要: Local adaptation and its underlying molecular basis has long been a key focus in evolutionary biology. There recently increased interest the role of plasticity mechanisms local adaptation. Using transcriptome analysis, we assessed differences gene expression profiles for three brown trout (Salmo trutta) populations, one resident two anadromous, experiencing different temperature regimes wild. The study was based on an F2 generation raised common garden setting. A previous F1 revealed reaction norms significantly higher QST than FST among populations early life-history traits. In present investigated if genomic norm patterns were also at level. Eggs from incubated temperatures (5 8 degrees C) representing conditions encountered environments. Global fry stage first feeding analysed using 32k cDNA microarray. results between population × interactions, latter indicating locally adapted norms. Moreover, paralleled those observed previously We identified 90 clones genes with interaction effect that differently expressed ecologically divergent populations. These included involved immune- stress response. less as compared to anadromous possibly reflecting degree environmental heterogeneity by individuals throughout their life cycle will select variable level phenotypic Our demonstrates usefulness approaches identify responses suggest may vary susceptibility climate change.