205 papers
Evolutionary biology explores the dynamic history of life on Earth, tracing how species change, adapt, and diversify over time. This field investigates the mechanisms driving everything from the development of antibiotic resistance in bacteria to the complex social behaviors of primates, revealing the deep connections that bind all living organisms together.
On Gist.Science, we ensure these groundbreaking discoveries remain accessible by processing every new preprint uploaded to bioRxiv in this category. Our team generates both plain-language overviews and detailed technical summaries for each paper, bridging the gap between raw research and public understanding without requiring a specialized background.
Below are the latest studies in evolutionary biology, offering fresh insights into the ongoing story of life.
This simulation study demonstrates that substitution rate variation, rather than hidden paralogy, is the primary driver of false hybridization signals in phylogenetic network inference, particularly biasing the find_graphs method and necessitating empirical calibration of statistical thresholds.
This study reveals that the clingfish family (Gobiesocidae) has undergone a root-level loss of canonical immunoglobulin genes and associated B-cell immune components, while retaining key T-cell and RAG genes, indicating a unique evolutionary erosion of the humoral immune axis rather than a complete loss of adaptive immunity.
This study demonstrates that female reproductive fluid in swordtails can rapidly evolve to bias fertilization toward conspecific sperm, serving as a potent postmating mechanism for reproductive isolation, particularly in species like *X. malinche* that lack strong premating barriers against hybridization.
Using experimental evolution with engineered snowflake yeast, this study demonstrates that obligate multicellularity overcomes fundamental population genetic barriers—specifically genetic drift and conflicting selection pressures—that otherwise constrain collective-level adaptation in facultative life cycles, thereby explaining why complex multicellularity has evolved exclusively in obligately multicellular lineages.
This study demonstrates that engineered tRNAs with unmodified adenine at the wobble position are translationally active but exhibit divergent fitness effects in *E. coli*, where they are neutral or beneficial in four-fold degenerate codon boxes due to superwobbling, yet deleterious in two-fold degenerate boxes likely due to amino acid misincorporation.
This study investigates the transcriptional and translational fate of pseudogenes in mealybug endosymbionts, revealing that while pseudogene transcripts are reduced and proteins are scarce, many transcripts still engage ribosomes, suggesting the tmRNA system plays a crucial role in rescuing ribosomes and degrading aberrant proteins before ribosome binding sites are evolutionarily eroded.
A study on nine *Caenorhabditis elegans* strains demonstrates that natural variation in male frequency fails to predict the magnitude of inbreeding depression or the extent of fitness recovery, indicating that male frequency is a poor proxy for realized outcrossing and its evolutionary benefits.
This study demonstrates that the major life-history locus *six6* drives genotype-by-environment interactions in juvenile rainbow trout, where heterozygous individuals exhibit distinct and steeper growth responses to warming temperatures compared to homozygotes, highlighting the role of standing genetic variation in shaping plasticity to climate change.
By analyzing gene family evolutionary dynamics across 26 pancrustacean orders, this study reveals that independently evolved metamorphic lineages share convergent genomic signatures characterized by the expansion of specific gene families involved in development and moulting, suggesting that moulting serves as a key reservoir for genetic innovation driving life history transitions.
This study demonstrates that relying on ITS and cox1 markers to infer zoonotic infections and recent hybridization between *Schistosoma haematobium* and livestock schistosomes is misleading, as genome sequencing reveals these markers do not accurately reflect the actual low levels of livestock ancestry in human parasites.