Articles tagged with Evolutionary Genetics
Researchers at KU Leuven found that the Pyrenean rocket, a plant from southern Europe, genetically adapted rapidly to its new environment in Belgium, allowing it to spread quickly. This study provides evidence that rapid evolution can aid the spread of non-native plant species.
Researchers at Michigan State University found that having somatic cells do the organism's dirty work helps explain the beneficial evolution of separating germ cells. This separation allows organisms to flourish while protecting their genetic material from damage.
A research team analyzed centipede venom protein and peptide sequences to catalog, categorize, and reconstruct their evolutionary histories. They identified 60 unique venom protein and peptide families from just five species investigated, including 11 new protein families showcasing novel centipede venom ways.
Scientists studied plant species Rumex hastatulus to understand the earliest stages of Y-chromosome degeneration. They found genes had already started to undergo genetic degeneration despite their recent origin, with degeneration depending on how long ago genes stopped recombining with each other.
A new framework increases the ability to detect genetic associations and interactions by utilizing data from existing genomic studies. The approach improves performance over standard methods and identifies promising candidates for genetic interactions affecting various diseases.
Recent 'rock snot' blooms are caused by native Didymosphenia geminata responding to changing conditions, not human introductions or new genetic strain. Climate change and environmental factors trigger the blooms.
Indiana University biologists will advance research on bacterial evolution using $6.2 million in funding from the US Army Research Office. The team will investigate how bacteria evolve in response to internal and external environments, with practical applications in human health, energy, and food production.
A Dartmouth-led study suggests that turtles share a more recent common ancestor with birds and crocodilians than with lizards and snakes. The research resolves a long-standing evolutionary debate, providing new insights into the relationships among reptile groups.
Researchers found that filling of ecological niches slows the diversification of Himalayan songbirds. The study, which analyzed genetic relationships between 461 songbird species, discovered that eastern Himalayan species are separated from each other by six to seven million years, suggesting a slowing of evolution.
Researchers identified 24 functional categories of genes with strong positive selection in ant lineages, including those related to nervous system development and immunity. Ant-specific signals on mitochondrial activity genes may be responsible for increased queen lifespan up to 30 years.
Electric fish have evolved sophisticated communication systems using modified muscle cells, allowing them to bypass predators in the dark. A gene duplication event led to the specialized Scn4aa sodium channel gene, which may have driven quicker evolution and adaptation in electric fish.
A new study identifies how a genetic variant in the SPG7 gene contributes to cardiovascular health by promoting chronic inflammation and cell division. The researchers found that the variant can activate itself in certain circumstances, leading to increased production of free radicals and more rapid cell division.
Genetic evidence reveals that dwarf birch was once common in England and Wales, with genes found across Britain. The study suggests global warming, deer grazing, and hybridisation are threats to the dwindling population.
Researchers have identified two independent sex-determining genes, SRY and AMHY, that emerged around 180 million years ago in the common ancestor of mammals. These genes are responsible for testicular development and determine an individual's sex.
The study found that genes on the Y chromosome are widely expressed across the body and contribute to differences in disease susceptibility between men and women. These genes are crucial for survival and have been selected over time, suggesting a new era in Y chromosome biology.
Researchers have sequenced the rainbow trout genome, revealing that roughly half of protein coding genes have been deleted since a genetic doubling event 100 million years ago. The study also shows retention of microRNA genes and original genes involved in embryonic development.
Researchers identified genes whose activity changed uniquely in modern humans during evolution, including those linked to Alzheimer's disease, autism, and schizophrenia. Epigenetic changes in the brain and immune systems distinguished us from Neanderthals and Denisovans.
An international team of researchers, led by a plant scientist at the University of California, Davis, reports that the domesticated chili pepper originated in central-east Mexico. The region, extending from southern Puebla and northern Oaxaca to southeastern Veracruz, was previously thought to be less suitable for the crop's origins.
Recent research suggests that domestication may be more complex than previously thought, with many species being domesticated less than expected. Studies on animal and plant domestication highlight the limitations of human agency in shaping organisms through selective breeding.
Researchers have found a genetic connection between chickens and chili peppers, suggesting that the latter were domesticated around the same time as humans. The study, published in the Proceedings of the National Academy of Sciences, used DNA analysis to reveal that yellow-skinned chickens became common only about 500 years ago.
Researchers have fully sequenced the Cryptococcus neoformans genome, providing a playbook to understand its pathogenesis and develop methods to combat its evolution into deadlier strains. The study reveals genetic changes that occur after laboratory handling, making the fungus more susceptible to stress and less virulent.
A recent genetic study suggests that insensitive genes, rather than complex interactions, may be responsible for the slow pace of plant domestication. This finding could help explain the lag in the archeological record and provide insights into the early stages of domestication.
A new study by Stanford scholars highlights the importance of increasing genetic diversity among tiger populations to ensure their survival. The research found that maintaining about 90% of genetic diversity is necessary for the species' survival and recommends focusing conservation efforts on creating wildlife corridors and crossbreed...
A study published in Nature Genetics identified a large number of heritable genes associated with disease risk, providing a new resource for understanding the genetic control of transcription. The researchers analyzed blood sample data from twins and found that heritable genes are more likely to be associated with disease.
The study identifies the world's top 50 most evolutionarily distinct bird species, including the South American oilbird and the Christmas Island frigatebird. These species have unique genetic characteristics that make them crucial for preserving the tree of life.
A Yale-led research team developed a new approach to species conservation that prioritizes genetic and geographic rarity. The method was applied to all 9,993 known bird species, revealing areas where maximum conservation of bird diversity can be achieved with minimal investment.
Research published in Psychological Science found that procrastination and impulsivity are genetically linked, with a complete genetic overlap between the two traits. This suggests that procrastination may be an evolutionary byproduct of impulsivity, manifesting itself more in modern times.
Researchers discovered that Homo's teeth decreased in size as its brain size increased over 2.5 million years, defying evolutionary expectations. The study attributes this phenomenon to a shift towards a higher animal-based diet, which provided essential nutrients for brain development and social advancements.
Researchers have identified a genetic association with facial asymmetry in an ancient cavefish, which may help solve mysteries surrounding cleft palate and hemifacial microsomia. The study used high-tech imaging techniques to compare the craniofacial features of cavefish with those of surface-dwelling fish.
Scientists from Museum für Naturkunde Berlin use genetic data and sound analysis to determine the taxonomic status of two West African treefrog species. They found that two previously considered a single species actually belong to two distinct species, one large and one small, with different call characteristics.
Researchers identified a new mechanism linking genetic variation to heart disease risk by disrupting the interaction between a developmental gene and a specialized type of RNA. This discovery expands understanding of complex disease risk and potential drug targets for cardiovascular disease.
Researchers at MIT discovered that tiny pores in the inner ear membrane filter sound frequencies, allowing humans to differentiate between competing sounds. The optimal pore size determines hearing sensitivity, with smaller or larger pores impairing hearing.
Researchers found that male and female owl monkeys were genetically monogamous, with no cases of extra-pair paternity. The team discovered a strong connection between a species' faithfulness and significant involvement of males in caring for their young.
A recent study identified genetic factors associated with lactase persistence in African populations, which became more prevalent after cattle domestication in Africa. Individuals retaining high levels of lactase enzyme allow them to digest milk sugars in adulthood.
Researchers found strong evidence of recent positive selection for lactase persistence in African populations, likely due to pastoralism. Three new genetic variants associated with the trait were identified, as well as two previously known SNPs, suggesting a link between cattle domestication and milk consumption.
A recent study found that competition between fish species in Lake Tanganyika drives the formation of new species. Two genetically distinct ecomorphs of a species have been identified, with large and small individuals occupying different habitats.
Researchers found that birds' choice of group size may be influenced by experimental design, rather than genetics. The study's conclusions are challenged due to errors such as regression to the mean and spatial fallacy.
Two NYU faculty members, Roozbeh Kiani and Nicholas Stavropoulos, have been awarded Sloan Foundation fellowships for their innovative research in neuroscience and sleep. Their work has the potential to lead to new medical interventions for mental and cognitive disorders and improve understanding of human sleep and its regulation.
UCLA researchers analyzed dozens of studies to find that ovulating women prefer mates with sexy traits like masculine body type and facial features, dominant behavior, and certain scents. These preferences shift as the woman's cycle progresses and are thought to have been markers of high genetic quality in male ancestors.
Researchers discovered a new gene called RCO that inhibits cell proliferation and growth between leaflets, allowing dissected leaves to form. The loss of this gene in Arabidopsis thaliana results in simple, entire leaves.
Researchers created a global map detailing the genetic histories of 95 populations across Europe, Africa, Asia, and South America. The study found evidence of previously unrecorded genetic mixing, including European DNA in modern-day China and Mongol DNA in Pakistan.
Researchers found that changes in a receptor protein called AHR2 may explain how killifish evolved genetic resistance to PCBs. The study suggests that evolution of resistance converges on the same target gene across independent populations.
A study published in Molecular Biology and Evolution found that Tibetan Mastiffs have undergone genetic adaptations to survive at high altitudes. The research identified 16 genes involved in energy production critical for high-altitude survival, suggesting convergent evolution between dogs and humans.
A University of Texas at Arlington team has uncovered that mutations and interactions among three genes create a wide variety of color variations in domestic pigeons. The study found two independent deletions near the Sox10 gene produce recessive red pigmentation, hinting at a slippery gene.
Researchers decoded the flatfish genome, providing insights into ZW sex chromosome evolution and benthic adaptation. The study also uncovered epigenetic mechanisms underlying temperature-dependent sexual reversal and trans-generational inheritance of such phenomena.
Researchers propose that fins and limbs develop from the area surrounding the belly due to the interaction of ectodermal tissues with mesoderm layers. This model, published in Evolution & Development, suggests that epigenetic factors play a crucial role in shaping embryonic development and ultimately giving rise to paired appendages.
Researchers at Oxford University found that flies living with their brothers cause less harm to females during courting than those living with unrelated flies. This is because related flies are more relaxed in their mating approach and spend less time harassing females, resulting in fewer fights and reduced fecundity for females.
Researchers discovered similar 3D DNA organization in fish and mouse clusters, indicating the main mechanism for patterning tetrapod limbs was present in fish. The study suggests that digits evolved by modernizing an ancestral regulatory mechanism.
Researchers discovered similar DNA organization in fish and mice, indicating a shared genetic mechanism for limb formation. The study suggests that digits evolved by modernizing an existing regulatory mechanism in fish, rather than through a radical change.
Researchers analyzed α-KTx family sequences to identify conserved amino acid sites associated with neurotoxin structure and function. A single genetic deletion event can convert an STS-containing insect defensin into a scorpion-like neurotoxin.
A unique study of white-throated sparrows found a genetic pathway connecting aggression and parenting behaviors to specific genes, specifically the estrogen receptor alpha (ER-alpha) gene. The research showed that variation in ER-alpha expression predicted behavior in territorial aggression and parenting.
A recent study published in Proceedings of the National Academy of Sciences found that some Indigenous people have limited immunity response to flu effects. The research suggests ethnic differences in immune responses to the H7N9 virus, which can lead to severe outcomes.
A Russian research team studied the link between genetic shifts and antigenic drift in influenza viruses. They found that reassortments lead to increased rates of point mutations, which can result in highly virulent strains. This study may aid in predicting future flu outbreaks.
A new study compares the relative rate of molecular evolution between humans and chimps with that of their lice. The researchers found that the lice are winning the molecular evolutionary race, with almost 15 times more changes in gene sequence.
Research reveals that five amino acid differences control allelic variations in the csd gene, determining femaleness in honeybees. The study found an evolutionary intermediate with only three amino acid differences between lethality and induced femaleness, supporting incomplete penetrance as a mechanism for gradual molecular evolution.
A new study found that bird species living together are more similar than different, challenging a widely-held theory on species evolution. The research suggests that competition may not be the driving force behind species differences, instead promoting the evolution of similar traits.
Research by Thanh-Lan Gluckman reveals that plumage patterning is labile in both males and females, with changes driven by environmental factors and signalling functions. The study challenges traditional views on sexual dimorphism, suggesting multiple types of dimorphism and adaptations to social and environmental conditions.
A University of Iowa researcher studied the evolution of dihydrofolate reductase enzyme from bacteria to humans. Key findings include the preservation of protein dynamics and catalysis across millions of years of evolution.
Studies show that environmental factors significantly impact the genetic makeup of fruit flies living in 'Evolution Canyon', a unique natural environment with contrasting climates. The research confirms natural selection as a powerful influence in shaping the population's gene pool.
Researchers found that environmental change activates the heat shock protein HSP90, silencing genetic variation and allowing for rapid adaptation in cavefish. This discovery validates the role of HSP90 in driving evolutionary change in vertebrates, enabling the emergence of novel traits.