Pronounced Plastic and Evolutionary Responses to Unpredictable Thermal Fluctuations in Drosophila simulans

Frontiers in Genetics
Jesper G SørensenVolker Loeschcke

Abstract

Organisms are exposed to temperatures that vary, for example on diurnal and seasonal time scales. Thus, the ability to behaviorally and/or physiologically respond to variation in temperatures is a fundamental requirement for long-term persistence. Studies on thermal biology in ectotherms are typically performed under constant laboratory conditions, which differ markedly from the variation in temperature across time and space in nature. Here, we investigate evolutionary adaptation and environmentally induced plastic responses of Drosophila simulans to no fluctuations (constant), predictable fluctuations or unpredictable fluctuations in temperature. We whole-genome sequenced populations exposed to 20 generations of experimental evolution under the three thermal regimes and examined the proteome after short-term exposure to the same three regimes. We find that unpredictable fluctuations cause the strongest response at both genome and proteome levels. The loci showing evolutionary responses were generally unique to each thermal regime, but a minor overlap suggests either common laboratory adaptation or that some loci were involved in the adaptation to multiple thermal regimes. The evolutionary response, i.e., loci under selection, ...Continue Reading

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Citations

Oct 8, 2021·Evolution; International Journal of Organic Evolution·Marta A SantosPedro Simões

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Datasets Mentioned

BETA
PRJNA629467

Methods Mentioned

BETA
Protein assay
protein folding

Software Mentioned

Mascot
Proteome Discoverer
Samtools
bwa
Percolator
Reporter Ions Quantifier
PoPoolation2
R
TrimGalore
Percolator validator

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