Articles tagged with Evolutionary Genetics
A new study explores how city life is influencing the evolution of urban coyotes, revealing genetic changes related to diet, health, thermoregulation, behavior, cognition, and reproduction. The research also highlights the challenges of studying urban coyotes, which are increasingly common in urban areas throughout the US.
Researchers analyzed 7,000 S. aureus samples to identify key genetic changes that enable bacterial survival in humans. The study revealed mutations associated with nitrogen metabolism and immune system evasion strategies.
A USC Stem Cell study found that the mammalian outer ear evolved from cartilaginous gills in fishes and marine invertebrates. The research used gene control elements to show a connection between gill and ear development.
Researchers found genetic variants that confer a benefit to chimpanzees in specific habitats, particularly those related to malaria. The study suggests that climate and land use changes will impact different chimpanzee groups differently.
A new study reveals that extreme global warming during the Late Cretaceous Period drove a split between Northern and Southern Hemisphere lamprey families. The findings suggest that tropical temperatures were too hot for larval lampreys, leading to their dispersal into temperate regions.
Research on hornwort genomes uncovers the secrets of plant evolution, revealing stable autosomes despite deep evolutionary history. The study also identifies dynamic accessory chromosomes and potential sex chromosomes, providing insights into plant reproductive strategies and adaptation to environmental challenges.
A new study reveals that bacteria species in Lake Mendota rapidly evolve over time, responding to changing seasonal conditions. The researchers found that hundreds of separate species would return almost fully to near copies of their genetic predecessors after a thousand or so generations of evolutionary pressures.
Researchers found that human cells have higher gene expression rates compared to chimpanzees, with 5-10% of genes showing significant differences. Human glial cells, particularly oligodendrocytes, showed the greatest variations in gene expression, suggesting a link to human brain complexity.
A joint research group clarifies a key mechanism of how retrotransposons preferentially insert in the centromere. The findings reveal strong integration biases for certain genetic elements, shedding light on rapid genome evolution.
A new study found that a unique population of large fish-eating herring has evolved in the Baltic Sea, exhibiting faster growth rates and lower levels of pollutants. These herring have adapted to the brackish water by switching from plankton-eating to a fish diet, with potential benefits for human consumption.
Researchers found that fruit flies have stolen a toxin-producing gene from bacteria to defend against parasitic wasps, which can turn fly larvae into surrogate wombs for baby wasps. This discovery highlights the importance of horizontal gene transfer in animal evolution and suggests it may be more common than previously thought.
Scientists investigated the role of ancient VR type-1 (ancV1R) receptor in pheromone detection using knockout mice. The study found that ancV1R-deficient female mice had impaired pheromone detection and exhibited abnormal sexual behavior.
A genomic analysis reveals eight different sex chromosomes in 11 species of the frog, indicating unique and newly evolved genes for male or female sexual differentiation. This unexpected variation allows researchers to explore rapid evolution in sex determination, with possible 'on-off switch' genes orchestrating sexual differentiation.
A new University of Texas at Arlington study provides a comprehensive genetic map of the common bedbug Cimex lectularius, enhancing scientific investigations into pesticide resistance and developing targeted pest control strategies.
A new method reveals a complete timetree of primates, including over 450 species, after aggregating untimed and timed phylogenies. This comprehensive tree represents the most complete description of primate evolution to date, enabling further research in fields like biogeography and conservation.
A recent study revises our understanding of the universal genetic code's evolution, suggesting that early life preferred smaller amino acids over larger ones. The researchers found that amino acids with aromatic ring structures were incorporated into the code later than previously thought, offering clues about other extinct genetic codes.
Researchers identified genes that impact tooth development and variation among ethnic groups. They found associations with tooth dimensions on genes inherited from Neanderthals and other genetic variants.
The LabEmbryoCam is a robotic instrument that autonomously monitors embryonic development in aquatic species, providing insights into how environmental conditions impact early life stages. The open-source instrument enables scientists to track key features such as heart rate and growth in large numbers of embryos simultaneously.
Three Texas A&M biologists have received NIH Maximizing Investigators’ Research Awards to support their research on type IV pili, darter fish social behaviors and bacteriophages. Drs Koch, Moran and Ramsey will explore bacterial behavior, genetic mechanisms and neural basis of paternal care in fish.
Researchers reconstructed the journey of maize into eastern North America, tracing its dispersal routes and history of selection. Ancient genomes reveal a genetic link between Northern Flints and 1,000-year-old Ozark maize, highlighting early adaptations for local climates and culinary preferences.
A landmark photosynthesis gene discovery has been made in a poplar tree that enhances plant growth by up to 200% and increases biomass production. The gene, named Booster, has the potential to boost crop yields without requiring more land, water or fertilizer.
Researchers found overlapping genetic underpinnings between rhythm-related skills and language-related traits, including dyslexia. The study identified 16 regions of the genome that overlapped between rhythm and language, suggesting a complex genetic architecture shared by these fundamental human traits.
A new whole-genome study challenges the long-held belief that Armenians are descendants of Phrygian settlers from the Balkans. Instead, researchers found a genetic input into the region from Neolithic Levantine farmers, suggesting a large-scale post-Early Bronze Age migration wave across the Middle East.
A novel method has been developed to infer DNA methylation patterns in non-skeletal tissues from ancient specimens, providing new insights into human evolution. The study found over 1,850 sites of differential methylation specifically in prefrontal cortex neurons, linked to genes crucial for brain development.
Researchers used ancient DNA to uncover novel signatures of adaptation in early Europeans, tracing genetic changes in response to lifestyle shifts. The study identified 14 regions of the genome that underwent significant natural selection, including traits related to vitamin D production and dairy digestion.
Researchers have discovered that seemingly 'broken' genes in coronaviruses are retained due to their functional role beyond protein production. These extra genes help control the activity of other viral genes.
An international team of researchers successfully created a mouse using genetic tools from a unicellular organism, challenging the notion that these genes evolved exclusively within animals. The study uses ancient genetic tools to reprogram mouse cells into pluripotent stem cells.
Researchers describe holobiont biology, a multidisciplinary approach uniting seen and unseen realms of life. Microbes outnumber human cells and contribute to biological variation in traits such as disease and body mass index.
A genetic study of five people buried in Pompeii's plaster casts reveals contradictions to long-held narratives about their sexes and family relationships. The analysis emphasizes the importance of integrating genetic data with archaeological and historical information to correct or enrich existing narratives.
A team of scientists observed a prehistoric unicellular organism, Chromosphaera perkinsii, forming multicellular structures resembling animal embryos. This suggests that embryonic development may have existed prior to the evolution of animals.
Researchers found that plants have multiple enzymes for adding methyl groups to DNA, allowing them to override genetic instructions. The study reveals the evolutionary history of these enzymes and their unique structures, providing insights into plant resilience to environmental changes.
Scientists studied Drosophila species' ability to adapt to day length fluctuations, revealing the critical role of the Pdf gene in regulating circadian plasticity. The study found that Drosophila melanogaster has a wider distribution due to its flexibility in responding to environmental changes.
Researchers demonstrate the first cross-chiral exponential amplification of an RNA enzyme, potentially leading to the development of cross-chiral therapeutics and biotechnologies. The discovery suggests that a bioengineer can create a new form of biochemical evolution by using both left- and right-handed molecules.
A team from UNIGE analyzed the formation of grooves in dog noses using 3D imaging and computer simulations. They found that differential growth of skin tissue layers leads to the formation of domes, supported by blood vessels.
A new study finds that the gene for starch-digesting saliva may have first duplicated more than 800,000 years ago, seeding genetic variation that shapes modern diet. This early duplication set the stage for significant variation in the amylase region, allowing humans to adapt to shifting diets with increasing starch consumption.
A study published in Biology Letters reveals that harbor seals in Alaska's Iliamna Lake are genetically isolated from other seal populations across the Pacific. The researchers found significant differences between the lake seals and marine populations, suggesting they may be a unique endemic form of harbor seal.
Researchers have decoded the genetic makeup of 'Samantha' rose variety to create a powerful resource for future comparative genomic studies. The study found that human selection has significantly influenced the genetic diversity of modern roses, but preserving genetic traits is essential for their health and adaptability.
Researchers found that seven common European forest trees have preserved their genetic diversity over millions of years, defying expectations. This resilience is attributed to unique characteristics such as long generation times and pollen dispersal capabilities.
A new study reveals that mountainous regions played a key role in human evolution, providing increased biodiversity and food resources. The Diversity Selection Hypothesis suggests that early humans adapted to steep terrain due to its enhanced environmental conditions.
A groundbreaking study reveals how leafcutter ant farming systems evolved without technology or culture, with the fungus adapting to life under ant cultivation through genetic changes that enhance its ability to break down plant material and defend against diseases.
A new study reveals that ant agriculture and fungus farming originated 66 million years ago, with colonies of ants beginning to cultivate fungi in the aftermath of the asteroid impact. This partnership has evolved over time, with some fungal crops becoming completely reliant on ants 27 million years ago.
Researchers discovered a massive number of evolutionary events in the Asteraceae family on remote islands, resulting from rapid speciation over short time periods. The findings confirm that larger, isolated islands harbor unique species and highlight the importance of protecting this diverse group of plants.
Researchers discovered a unique change in cardiac troponin I that enables shrews to achieve heart rates up to 17 beats per second. This evolutionary loss removes brakes on heart relaxation, allowing for faster heartbeats. The study provides insights into the evolution of high-heart-rate mammals and potential biomedicine applications.
Northern elephant seals nearly went extinct due to overhunting but have since recovered to around 225,000 individuals. The recent study found the species' genetic diversity was reduced during this period, which may impair their ability to cope with future environmental changes.
The study reveals that sea robin legs are sensitive to both mechanical and chemical stimuli, and are covered in papillae similar to human taste buds. The research provides new insights into the evolution of this unique trait, which could offer clues about how humans developed bipedalism.
Researchers at Cold Spring Harbor Laboratory create a roadmap of how prostate cancer spreads throughout the body, showing that aggressive cells seed cancer's rare migrations to bones, liver, lungs, and lymph nodes. The new technology offers a clearer picture of cancer spread and could lead to more targeted therapeutics.
Researchers have identified hundreds of genes and microproteins specific to human hearts, which are also abnormally expressed in heart failure. These findings provide new insights into cardiac disease and suggest potential targets for therapy.
A new study from Stanford University provides a tool for conservationists and law enforcement to protect captive tigers and prosecute wildlife crimes. The researchers analyzed the genetic diversity of privately held tigers in the US, finding that many are a mix of wild tiger ancestry, but also reflect characteristics of the illegal trade.
Researchers propose a new model for understanding how new genes can originate through the recycling and innovation of ancestral genes. A study on antifreeze proteins in fish reveals that similar proteins evolved independently from different genetic sources, demonstrating convergent evolution and protein sequence convergence.
Researchers confirm 15 new species in Characidium genus, including genetic distance smaller than 2% between species with significant morphological differences. The study highlights the need for reevaluation of species classification and evolutionary history.
Researchers observed accelerated presence of genetic variations increasing heat tolerance in European forest fly populations. The pace of new inversions is too slow to make up for the increase in temperatures, putting species with lower genetic variation at risk.
A century-old experiment has pinpointed the genes behind barley's adaptability, enabling its continued survival in rapidly changing environments. Researchers identified key genes that enable flowering at optimal times, allowing crops to thrive despite increased temperatures and droughts.
A comprehensive genomic analysis of Atractylodes lancea reveals how natural variations drive its evolution and metabolic adaptations, particularly affecting the production of key medicinal compounds. The study identifies crucial genetic variations influencing the plant's metabolome across regions.
Researchers propose a new approach to understanding cancer evolution, acknowledging the importance of environmental influences and epigenetic changes. By refining the clonal evolution model, they aim to develop more effective cancer therapies that consider the full complexity of cancer cell evolution.
A Danish study reveals that only children and those with half- or step-siblings enter puberty significantly earlier than children with biological siblings. The study found a two-month difference in girls' pubertal timing and a smaller but still significant gap for boys.
A recent study published in Molecular Biology and Evolution has discovered the genetic background of head shape variation in snail-eating carabid beetles. The researchers identified the odd-paired (opa) gene as a key factor determining the beetle's body shape, which is linked to its feeding strategy.
Researchers discovered that cyanobacteria can anticipate seasonal changes by sensing photoperiod, promoting cold resistance and altering lipid metabolism. This adaptation may have evolved before circadian clocks, suggesting a new perspective on biological timekeeping.
Researchers at FAU aim to identify signatures of natural selection in the human genome, understanding its role in adaptation and disease. The $1.8 million NIH grant will develop powerful tools for complex modes of adaptation from genetic data.
A new species of Antarctic dragonfish, Akarotaxis gouldae, has been identified in waters off the western Antarctic Peninsula. The discovery highlights the fragile state of the Antarctic ecosystem and raises concerns about the impact of commercial fishing activities on this vulnerable species.
Researchers found that cactus diversity is driven by temperature range, sand content in the soil, and seasonal changes. Mexico has the highest biodiversity but lowest rate of speciation due to slower extinction rates.