Publications by authors named "D R Wegmann"
Admixture between populations and species is common in nature. Since the influx of new genetic material might be either facilitated or hindered by selection, variation in mixture proportions along the genome is expected in organisms undergoing recombination. Various graph-based models have been developed to better understand these evolutionary dynamics of population splits and mixtures.
View Article and Find Full Text PDFThe identification of sex-linked scaffolds and the genetic sex of individuals, i.e. their sex karyotype, is a fundamental step in population genomic studies.
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- - Biodiversity loss is accelerating due to human activities, making it essential to measure the impacts of various environmental stressors accurately and consistently.
- - A new framework has been developed to help quantify these impacts by examining biodiversity in affected areas versus unaffected reference points while considering changes over time.
- - This framework aims to address important questions in ecology, like comparing impacts from different stressors, understanding their interactions, and evaluating the effectiveness of conservation efforts over time.
Admixture has been a major force during human evolution. Two new studies using ancient DNA now show how two key admixture events in the evolutionary history of Europeans altered their adaptive trajectories and facilitated rapid evolution.
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- Quaternary climate changes forced species like Dianthus sylvestris to move to new geographic areas, affecting their genetic makeup.
- Recent theories suggest that as these species migrated, they might have adapted through a process called "sieving" of beneficial genotypes, though this connection hasn't been thoroughly proven.
- By analyzing genomic data from over 1200 individuals and modeling their responses to past climate changes, researchers found that adaptation occurred alongside these range shifts as populations adapted to diverse habitats after the last glacial period.