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Temperature Stress Mediates Decanalization and Dominance of Gene Expression in


Gene expression is the most direct link between the genetically encoded information and the phenotype. We analyzed the patterns of gene expression in two different D. melanogaster genotypes and their offspring at four different temperatures to determine if gene expression regulation is modulated by temperature. Interestingly, we find that at the intermediate temperature (18°C) alleles from both genotypes have very similar gene expression, suggesting a strong canalization of gene expression despite substantial genetic differences. More extreme temperatures break this canalization and result in many differently expressed genes, caused mainly by trans-acting factors. Most of the expression differences are non-additive, with a swap in dominance between the two extreme temperatures.


Vyšlo v časopise: Temperature Stress Mediates Decanalization and Dominance of Gene Expression in. PLoS Genet 11(2): e32767. doi:10.1371/journal.pgen.1004883
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.pgen.1004883

Souhrn

Gene expression is the most direct link between the genetically encoded information and the phenotype. We analyzed the patterns of gene expression in two different D. melanogaster genotypes and their offspring at four different temperatures to determine if gene expression regulation is modulated by temperature. Interestingly, we find that at the intermediate temperature (18°C) alleles from both genotypes have very similar gene expression, suggesting a strong canalization of gene expression despite substantial genetic differences. More extreme temperatures break this canalization and result in many differently expressed genes, caused mainly by trans-acting factors. Most of the expression differences are non-additive, with a swap in dominance between the two extreme temperatures.


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