Researchers studying evolution of 'naked' (hairless) larval cuticle in Drosophila sechellia have discovered surprising complexity in the pattern of cis-regulatory differences that differentiate this species from its 'hairy' ancestors.
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http://dx.doi.org/10.1016/j.cub.2007.08.020 | DOI Listing |
Inflamm Bowel Dis
January 2025
Department of Genetics and Genomics, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Pl, Box 1498, New York, NY 10029, USA.
Background: Clonal hematopoiesis of indeterminate potential (CHIP) is the presence of somatic mutations in myeloid and lymphoid malignancy genes in the blood cells of individuals without a hematologic malignancy. Inflammation is hypothesized to be a key mediator in the progression of CHIP to hematologic malignancy and patients with CHIP have a high prevalence of inflammatory diseases. This study aimed to identify the prevalence and characteristics of CHIP in patients with inflammatory bowel disease (IBD).
View Article and Find Full Text PDFPLoS Biol
January 2025
Institut de Génétique Humaine, Univ Montpellier, Centre National de la Recherche Scientifique, Montpellier, France.
In many eukaryotes, meiotic recombination occurs preferentially at discrete sites, called recombination hotspots. In various lineages, recombination hotspots are located in regions with promoter-like features and are evolutionarily stable. Conversely, in some mammals, hotspots are driven by PRDM9 that targets recombination away from promoters.
View Article and Find Full Text PDFMol Plant Microbe Interact
January 2025
ETH Zurich Department of Environmental Systems Science, Plant Pathology Group, Institute of Integrative Biology, Zurich, Zürich, Switzerland.
Adaptation to new climates poses a significant challenge for plant pathogens during range expansion, highlighting the importance of understanding their response to climate to accurately forecast future disease outbreaks. The wheat pathogen is ubiquitous across most wheat production regions distributed across diverse climate zones. We explored the genetic architecture of thermal adaptation using a global collection of 411 strains that were phenotyped across a wide range of temperatures and then included in a genome-wide association study.
View Article and Find Full Text PDFMol Ecol
January 2025
Department of Ecosystem Science and Management, Pennsylvania State University, University Park, Pennsylvania, USA.
Understanding the evolutionary processes underlying range-wide genomic variation is critical to designing effective conservation and restoration strategies. Evaluating the influence of connectivity, demographic change and environmental adaptation for threatened species can be invaluable to proactive conservation of evolutionary potential. In this study, we assessed genomic variation across the range of Fraxinus latifolia, a foundational riparian tree native to western North America recently exposed to the invasive emerald ash borer (Agrilus planipennis; EAB).
View Article and Find Full Text PDFNatural hybridisation among rare or endangered species and stable congenerics is increasingly topical for the conservation of species-level diversity under anthropogenic impacts. Evidence for beneficial genes being introgressed into or selected for in hybrids raises concurrent questions about its evolutionary significance. In Darwin's tree finches on the island of Floreana (Galapagos Islands, Ecuador), the Critically Endangered medium tree finch () undergoes introgression with the stable small tree finch (), and hybrids regularly backcross with Earlier studies in 2005-2013 documented an increase in the frequency of hybridisation on Floreana using field-based and microsatellite data.
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