About this Research Topic
Currently, there is a boom of studies involving genome-wide sequencing (DNA or RNA) in both model and non-model organisms. This allows to gather unprecedented information on genetic variation and/or on gene expression within and among populations under contrasting scenarios. Such progress is contributing to our understanding of the genomics of thermal adaptation and population differentiation in thermal responses, including emergent fields such as epigenetics and microbiome-host evolution. Nevertheless, there is still much to explore in the characterization of the genetic architecture underlying the adaptation to climate change. Many teams are addressing issues related to the genetic mechanisms of several stresses posed by the environment, including extreme temperatures. The wide panoply of methods used in evolutionary biology, from comparative approaches across species to real-time (experimental) evolution studies and inter and intra-population analysis associated with genome-wide sequencing, provide the tools needed to tackle essential questions for an integrative understanding of how populations may cope with climate change.
The objective of this Research Topic is to bring together studies contributing to a genomic perspective to understand thermal stress responses. Such studies will allow addressing several questions, among which we anticipate the following:
- Do populations present enough genetic variability to cope with climate change via evolutionary changes?
- Is (genomic) evolutionary potential to adapt to climate changes more limited in some species or populations than others?
- What are the genomic differences between populations that adapt to contrasting temporal thermal patterns?
- How much do populations differ in the genetic pathways that underly thermal adaptation?
- Are there common genes underlying thermal adaptation? What is their variation across species?
- What is the genetic basis of plastic thermal responses?
- What is the relative role of regulation of gene expression versus evolutionary genetic changes in how populations respond to climate change?
- What is the impact of temperature on microbiome-host evolution?
With this collection, we wish to contribute to a better understanding of the genomic basis of thermal adaptation and how much the genetic and genomic diversity of populations and species may present common or different challenges posed by climate change worldwide.
Keywords: climate change, thermal adaptation, genomic evolutionary potential, thermal plasticity, thermal adapted candidate genes
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