Articles tagged with Evolutionary Genetics
A recent study with 100 pairs of mice found that elite athleticism does not shorten lifespan or limit reproductive success. The researchers observed that high runner mice bred for extraordinary distance running had no reduced reproductive success or lifespan compared to regular mice.
Researchers found four immune system genes shaped by ancient infectious diseases, which may influence severe COVID-19. Rare genetic variants in these genes were associated with increased risk of severe illness and organ transplants.
Researchers recovered and analyzed ancient viral DNA from a local community in northern Chile, revealing the strongest direct evidence linking European colonization to the introduction of smallpox to the Americas. The study shows that smallpox evolved in a way that allowed it to spread successfully with minimal adaptation.
A recent study found that wild snapdragons use subtle shades to attract bees, with four paintbrush genes working together to create a gradient of yellow. The strength of natural selection on each gene was estimated using a hybrid zone where two varieties meet, revealing the intricate mechanisms behind molecular gradients.
Researchers at the University of Michigan found that pollinators are driving plant adaptation in morning glories, leading to a steep decline in their ability to adapt to changing climate conditions. The study suggests that human activities such as pesticide use and habitat destruction have contributed to this decline.
A new evolutionary theory proposes that asexual parasites can temporarily infect a wider range of hosts as harmful genetic mutations build up. This process, known as Ratchet-Driven Generalism, may make the parasite less specialized and more adaptable. However, it may also ultimately reduce fitness and increase extinction risk.
Researchers at UNH and Cornell discovered that Salvinia ferns have dynamic genomes linked to reproduction differences. The study reveals the role of chromosome fissions and fusions in shaping their genome size and structure.
Research reveals bacteria rely on circadian clocks to organize colonies, controlling gene expression and pattern formation. The discovery has important implications for understanding bacterial ecology and improving plant growth.
A new genetic study provides the most detailed picture to date of late Neandertal diversity in North-Western Europe. The researchers found that these Neandertals were part of a larger and more well-connected regional population, unlike previously seen in Siberia.
A recent study reveals that cancer cells within tumors are genetically diverse, yet all carry the same core genetic changes. The research found that these changes occur in sudden bursts, creating distinct subpopulations that influence tumor aggressiveness and treatment response.
Researchers have found that horizontal gene transfer contributed to the repeated evolution of fungi-like, absorption-feeding life across eukaryotes. The study identified 166 cases where genes were transferred between four groups of eukaryotes, including Fungi and Pseudofungi.
A new study on ancient genomes reveals that the extinct cave lion had a highly distinct evolutionary lineage, separating from modern lions over 1.5 million years ago. The research found evidence of interbreeding between cave and modern lions across tens of thousands of years, linked to past climate changes.
Researchers identify previously unknown protein RAK1, crucial for three-dimensional growth and division in moss, a step towards understanding plant colonization of land. The study provides new insight into fundamental mechanisms underlying plant growth and evolution.
A study by Kyoto University researchers found that the bright orange tail of tadpoles serves as a lure to distract predators, allowing them to avoid more vulnerable parts of their body. The team observed that dragonfly nymphs were more likely to attack the tails than other body parts.
Researchers reconstructed the most detailed map of molecular machines that carried out life's functions in an ancient ancestor, revealing hundreds of new genes associated with human diseases. The study confirmed links between three rare disorders and identified potential targets for treating other diseases.
Recent advancements in animal models, organoid models, and bioengineered organoids have provided new tools for studying primary sclerosing cholangitis. These models replicate the effects of bile retention and inflammation, enabling studies of disease mechanisms, drug screening, and preclinical evaluation.
A new study reveals that four specific genes are crucial for the Atlantic herring's adaptation to low salinity in the Baltic Sea. The genes, expressed in sperm, eggs, and early embryos, enable the fish to reproduce successfully in brackish water.
New research from the University of Virginia suggests that rear-edge populations of plants may be more resilient to climate change than expected. These populations, which have endured thousands of years of warming, have evolved specific traits allowing them to thrive in warmer climates.
Researchers at Lund University mapped the genome of Drosophila enhydrobia, a carnivorous fruit fly that lives entirely underwater in African streams. The study shows clear genetic adaptations to its unusual lifestyle, highlighting the importance of natural history museums for understanding biodiversity and evolution.
A new study reveals that 3.4 billion years ago, life on Earth used biochemical processes reliant on the metal molybdenum, which is scarce in its environment. Molybdenum speeds up chemical reactions essential for life, enabling organisms to survive without it, but at a slower rate.
The new AI model uses genetic mutation patterns to trace ancestral relationships between species, including humans and mosquitoes. The tool can predict when gene pairs last shared a common ancestor and is faster than traditional statistical methods.
Research led by University of Utah biologists shows that host genetics and sex influence how influenza viruses evolve. Female mice from a specific strain exhibit accelerated virulence gains compared to male mice.
The Mediterranean fin whale population is found to be genetically connected to North Atlantic populations, contrary to previous assumptions. This finding highlights the need for reevaluation of conservation strategies and increased connectivity between populations.
Researchers studied evolution of Scalesia genus, finding lobed leaves evolved through multiple genetic pathways. The study highlights the flexibility and creativity of evolution, with new species forming and populations showing large genetic differences.
A newly discovered pitviper, Trimeresurus lii, is found to be a distinct lineage with unique physical characteristics and venomous properties. The species was previously mistaken for the bamboo pitviper due to similar green appearance.
A Chinese-German research team has reconstructed the genetic processes of re-diploidization in snow carps, revealing the fusion of chromosomes as the first stage. This process, which occurred relatively recently in evolutionary terms, led to an initial fourfold set of chromosomes that eventually reduced to two through asynchronous fusi...
The study identified over a million genetic variants, revealing unique diversity and adaptations to environments. Ancient DNA and geographic data also provide insights into the movements and migrations of Native American populations.
African elephants' genetic history shows they once moved across large distances, exchanging genes throughout the continent. However, current patchy habitats and human activities have led to genetic consequences of isolation, affecting conservation approaches.
Researchers found two strategies used by bacteria to colonize new habitats: acquiring new traits and reducing genome size. This study sheds light on the evolutionary biology of soil microbes, revealing unexpected results about their adaptation to freshwater environments.
Researchers uncover distinct patterns of Indigenous and European ancestry in urban Peruvian population, challenging common categorizations. The study's findings hold significant implications for precision medicine and health disparities among Latin Americans.
A new study from Okinawa Institute of Science and Technology (OIST) identifies the 'long fuse' that led to the diversification of modern squid and cuttlefish. The research suggests that these animals originated in the deep ocean around 100 million years ago, sparking rapid evolution after a mass extinction event.
A large-scale computational study found that point-of-origin effects significantly influence protein diversification, with relatively small divergence seen from ancestral proteins. The research reinforces existing theories on initial protein formation and highlights the limitations of modern AI protein design methods.
Researchers tracked genetic changes in Arabidopsis thaliana across 30 sites over five years, finding most populations adapted to local environmental conditions. However, some populations went extinct due to genetic drift, highlighting the importance of preserving biodiversity.
A new open access database of cactus ecology and evolution could help scientists and conservationists save species from the brink. The CactEcoDB offers an unprecedented window into the evolution, ecology and conservation needs of one of the world's most distinctive and endangered plant families.
A comprehensive study using integrated genomic approach resolves Hylodesmum's taxonomic uncertainties and EA-ENA disjunct distribution. The study confirms Verdesmum as nested within Hylodesmum and reveals a complex bidirectional dispersal pattern likely facilitated by mammal-mediated epizoochory.
A new species of leaf warbler, Tokara Leaf Warbler, has been discovered in Japan through DNA analysis. The species is found only on two island groups and is considered vulnerable due to low genetic diversity and potential population declines.
A new study reveals that selfish chromosomes exploit the Overdrive gene to destroy rival sperm, boosting their chances of passing into the next generation. The gene acts as a quality control checkpoint during sperm development, normally eliminating abnormal sperm cells, but selfish chromosomes hijack the system to kill competitors.
A new study from Duke University found that most lethal mutations in wild fruit flies are driven by newly transferred jumping genes, not small DNA errors. The research reveals a hidden layer of evolution where lethal mutations persist in generations due to the impact of transposable elements.
The preference for feeding on humans among certain mosquito species evolved around 1.8 million years ago in response to the arrival of early hominins in Southeast Asia. This finding provides independent evidence supporting the limited fossil record of early hominin arrival in the region.
Researchers found that birds adapting to sugar-rich diets evolved both shared and unique genetic changes, affecting genes controlling blood pressure, heart rhythm, and insulin signaling. These findings hold promise for understanding metabolic diseases like diabetes and may lead to new therapeutic targets.
Researchers found that long-standing mating preferences led to sex-biased interbreeding, resulting in the loss of Neanderthal DNA on X chromosomes. The study reveals a complex social history of human evolution, challenging the idea that survival of the fittest drove human migration.
A study of 225 newborns found that high prenatal oestrogen levels, indicated by long index fingers, are associated with large head circumference and increased brain size in boys. This could provide evidence for the positive influence of prenatal oestrogen on human brain evolution
A study published in PNAS reveals that Sudanese Copts have acquired a genetic variant that protects them from contracting malaria after mixing with other Sudanese populations. The acquisition of this variant took place over 1,500 years and has led to an evolutionary adaptation to the disease.
A new study found that the people of Deep Mani represent one of the most genetically distinctive populations in Europe, with many lineages tracing back to the Bronze Age, Iron Age, and Roman period. The research team discovered that present-day Deep Maniot men descend from a single male ancestor who lived in the 7th century CE.
Researchers found that termites evolved from cockroach ancestors that became dependent on cooperation and food sharing within colonies. Monogamy and high relatedness were crucial for the evolution of complex social systems in termites, with genes involved in sperm motility being lost due to the absence of sperm competition.
A QUT-led study has found how increasing aridity and habitat variation led to the diversification of modern kangaroos and wallabies. The research reveals that these iconic Australian marsupials evolved in two major bursts over the past nine million years, with their expansion coinciding with the emergence of grasslands.
A study led by Lund University reveals how a dominant wall lizard species has wiped out several color variants within its population. The researchers analyzed data from over 10,000 individuals and found that the aggressive 'Hulk' lizards have shifted the balance of colors, leaving only white throat colors remaining.
Researchers used genetic data from house sparrows to develop a statistical model that can predict traits in other species. The study found that making predictions across different populations works less well than within populations, but provided new insights for improving the technique.
A new study found that wood warblers have borrowed color-related genes from neighboring species, leading to the evolution of diverse plumage colors. This gene exchange, known as introgression, occurred across multiple genera and is believed to have played a role in the group's rapid diversification.
A new study found that rising temperatures are driving changes in polar bear DNA, which may help them adapt to increasingly challenging environments. The researchers discovered that genes related to heat-stress, aging, and metabolism are behaving differently in polar bears living in southeastern Greenland.
A new study reveals that Homo sapiens evolved in southern Africa for at least 200,000 years, contradicting previous theories. The analysis of 28 ancient genomes found genetic adaptations that shaped the species and unique variants linked to kidney functions and cognitive evolution.
A recent Nature study reveals that complex life developed significantly earlier than previously thought, around 2.9 billion years ago. This challenges existing theories and proposes a new scenario for eukaryogenesis, where the nucleus and other internal structures evolved before mitochondria.
Researchers analyzed DNA of 28 ancient southern Africans, finding 490 modern human-specific genetic variants, including immune system and kidney function genes. These adaptations may be related to human's water-retention and body-cooling system, giving special endurance.
A study published in Nature found that wild birds, particularly ducks, geese, and swans, are driving the current US bird flu outbreak. The viruses were introduced to North America via migratory birds and have become better adapted to infect wild birds since 2020.
A recent study from researchers at the University of Bristol and University of Barcelona found that animals from various lineages independently developed similar genetic adaptations to thrive on land. The research analyzed 154 genomes across 21 animal species and identified common genetic basis for transitioning from water to land.
A new study found that rapidly evolving animals, such as the Greater Kudu and Big Horn Sheep, have fewer cancerous tumors. In contrast, non-cancerous tumors showed no significant difference in prevalence across species. The research suggests that evolution built stronger cancer defenses in rapidly changing species.
A team of researchers has identified a common sex-determining gene called ANTSR in both bees and ants, revealing a conserved mechanism that has been present for over 150 million years. This finding sheds light on the genetic basis of sex determination in these species and may have implications for bee conservation and breeding programs.
Researchers at OIST develop a new method harnessing 'jumping genes' to recreate the termite tree of life, providing a template for solving ancient evolutionary mysteries. The study achieves similar accuracy to trees built from thousands of protein marker sequence alignments.
Research from La Trobe University reveals 'broken' genes as a common factor in marsupial fur color. The study found missing DNA stretches disabling the Agouti Signalling Protein gene in black morph eastern quolls and Tasmanian devils, leading to unique coat colors.
Researchers found a genetic variant that protects against winter vomiting disease, which was introduced to Europe through early farmers around 6,000 BCE. The FUT2 gene variant is linked to an increased risk of stomach ulcers and gallstones, but provides full protection against the virus.