DOI: 10.1101/471540Nov 16, 2018Paper

The microbiota influences the Drosophila melanogaster life history strategy

BioRxiv : the Preprint Server for Biology
Amber W WaltersJohn Chaston


Organismal life history traits are ideally adapted to local environments when an organism has a fitness advantage in one location relative to conspecifics from other geographies. Local adaptation has been best studied across, for example, latitudinal gradients, where organisms may tradeoff between investment in traits that maximize one, but not both, fitness components of somatic maintenance or reproductive output in the context of finite environmental resources. Latitudinal gradients in life history strategies are traditionally attributed to environmentally mediated selection on an animal's genotype, without any consideration of the possible impact of associated microorganisms (microbiota) on life history traits. Here we show that in Drosophila melanogaster, a key organism for studying local adaptation and life history strategies, associated microorganisms can drive life history variation. First, we reveal that an isogenic fly line reared with different bacteria vary the investment in early reproduction versus somatic maintenance, with little resultant variation in lifetime fitness. Next, we show that in wild Drosophila the abundance of these same bacteria was correlated with the latitude and life history strategy of the flies...Continue Reading

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Drosophila melanogaster
Selection, Genetic
Cell Line, Tumor

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