Functional analysis of a putative target of spatially varying selection in the menin1 gene of drosophila melanogaster

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Abstract

While significant effort has been devoted to investigating the potential influence of spatially varying selection on genomic variation, relatively little effort has been devoted to experimental analysis of putative variants or genes experiencing such selection. Previous population genetic work identified an amino acid polymorphism in the Mnn1 gene as one of the most strongly latitudinally differentiated SNPs in the genome of Drosophila melanogaster in the United States and Australia. Here we report the results of our transgenic analysis of this amino acid polymorphism. Genotypes carrying alternative Mnn1 alleles differed in multiple phenotypes in a direction generally consistent with phenotypic differences previously observed along latitudinal clines. These results support inferences from earlier population genomic work that this variant influences fitness, and support the idea that the alleles exhibiting clines may be likely to have pleiotropic effects that are correlated along the axes favored by natural selection.

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Svetec, N., Saelao, P., Cridland, J. M., Hoffmann, A. A., & Begun, D. J. (2019). Functional analysis of a putative target of spatially varying selection in the menin1 gene of drosophila melanogaster. G3: Genes, Genomes, Genetics, 9(1), 73–80. https://doi.org/10.1534/g3.118.200818

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