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Genomic architecture and evolution of a seasonal reaction norm [ATAC-seq]

ABSTRACT: Genomic architecture and evolution of a seasonal reaction norm [ATAC-seq]

PROVIDER: PRJNA559165 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9920670_1.fastq.gz	Fastqsanger.gz
	SRR9920670_2.fastq.gz	Fastqsanger.gz
	SRR9920671_1.fastq.gz	Fastqsanger.gz
	SRR9920671_2.fastq.gz	Fastqsanger.gz
	SRR9920672_1.fastq.gz	Fastqsanger.gz

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Genomic architecture and evolution of a seasonal reaction norm

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Genomic architecture and evolution of a seasonal reaction norm [RNA-seq]

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Genomic architecture and evolution of a seasonal reaction norm [ATAC-seq]

Project description:Here we used artificial selection to assimilate a seasonal wing color phenotype from a naturally plastic population of butterflies. Using SNP association and RNAseq we mapped three genes responsible for wing color fixation, including the color pattern supergene cortex. Combined with endocrine and chromatin accessibility assays, we found that the rapid transition of wing coloration from an environmentally determined trait to a fixed, genetic trait occurred through selection on cis-regulatory alleles of genes with wing-specific functions, not by changes in environmental detection or hormone signaling.

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Genomic architecture and evolution of a seasonal reaction norm [RNA-seq]

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Genomic architecture and evolution of a seasonal reaction norm [Hi-C]

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Genomic architecture and evolution of a seasonal reaction norm

Project description:This SuperSeries is composed of the SubSeries listed below.

2020-12-08 | GSE135523 | GEO

Evolution of a predator-induced, nonlinear reaction norm.

Project description:Inducible, anti-predator traits are a classic example of phenotypic plasticity. Their evolutionary dynamics depend on their genetic basis, the historical pattern of predation risk that populations have experienced and current selection gradients. When populations experience predators with contrasting hunting strategies and size preferences, theory suggests contrasting micro-evolutionary responses to selection. Daphnia pulex is an ideal species to explore the micro-evolutionary response of anti-predator traits because they face heterogeneous predation regimes, sometimes experiencing only invertebrate midge predators and other times experiencing vertebrate fish and invertebrate midge predators. We explored plausible patterns of adaptive evolution of a predator-induced morphological reaction norm. We combined estimates of selection gradients that characterize the various habitats that D. pulex experiences with detail on the quantitative genetic architecture of inducible morphological defences. Our data reveal a fine scale description of daphnid defensive reaction norms, and a strong covariance between the sensitivity to cues and the maximum response to cues. By analysing the response of the reaction norm to plausible, predator-specific selection gradients, we show how in the context of this covariance, micro-evolution may be more uniform than predicted from size-selective predation theory. Our results show how covariance between the sensitivity to cues and the maximum response to cues for morphological defence can shape the evolutionary trajectory of predator-induced defences in D. pulex.

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Mechanisms of innate events during skin reaction following intradermal injection of seasonal influenza vaccine

Project description:The skin plays a crucial role in host defences against microbial attack and the innate cells must provide the immune system with sufficient information to organize these defences. This unique feature makes the skin a promising site for vaccine administration. Although cellular innate immune events during vaccination have been widely studied, initial events remain poorly understood. Our aim is to determine molecular biomarkers of skin innate reaction after intradermal (i.d.) immunization. Using an ex vivo human explant model from healthy donors, we investigated by NanoLC-MS/MS analysis and MALDI-MSI imaging, to detect innate molecular events (lipids, metabolites, proteins) few hours after i.d. administration of seasonal trivalent influenza vaccine (TIV). This multimodel approach allowed to identify early molecules differentially expressed in dermal and epidermal layers at 4 and 18 h after TIV immunization compared with control PBS. In the dermis, the most relevant network of proteins upregulated were related to cell-to-cell signaling and cell trafficking. The molecular signatures detected were associated with chemokines such as CXCL8, a chemoattractant of neutrophils. In the epidermis, the most relevant networks were associated with activation of antigen-presenting cells and related to CXCL10. Our study proposes a novel step-forward approach to identify biomarkers of skin innate reaction.

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Project description:Temperature has a profound effect on the species composition and physiology of marine phytoplankton, a polyphyletic group of microbes responsible for half of global primary production. Here, we ask whether and how thermal reaction norms in a key calcifying species, the coccolithophore Emiliania huxleyi, change as a result of 2.5 years of experimental evolution to a temperature ?2°C below its upper thermal limit. Replicate experimental populations derived from a single genotype isolated from Norwegian coastal waters were grown at two temperatures for 2.5 years before assessing thermal responses at 6 temperatures ranging from 15 to 26°C, with pCO 2 (400/1100/2200 ?atm) as a fully factorial additional factor. The two selection temperatures (15°/26.3°C) led to a marked divergence of thermal reaction norms. Optimal growth temperatures were 0.7°C higher in experimental populations selected at 26.3°C than those selected at 15.0°C. An additional negative effect of high pCO 2 on maximal growth rate (8% decrease relative to lowest level) was observed. Finally, the maximum persistence temperature (Tmax) differed by 1-3°C between experimental treatments, as a result of an interaction between pCO 2 and the temperature selection. Taken together, we demonstrate that several attributes of thermal reaction norms in phytoplankton may change faster than the predicted progression of ocean warming.

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