Articles tagged with Evolutionary Genetics
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.
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.
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.
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.
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.
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...
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 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.
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.
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.
Researchers from Princeton University uncover the origins of the human-biting mosquito Culex pipiens molestus, dating it back over 1,000 years to ancient agricultural societies in Egypt. The study reveals genetic links between bird-biting and human-biting mosquitoes, crucial for understanding West Nile virus transmission.
A recent study analyzed 390 parent-offspring trios to identify gene mutations that occur in the sperm or ovum, leading to de novo mutations. The results show a clear correlation between parental age and the number of new mutations in puppies, with higher paternal age increasing the risk.
David Stern, a Senior Group Leader at Janelia Research Campus, joins Stowers Institute to uncover new avenues of biology with enormous implications. His lab discovered 'bicycle proteins' that trick plants into growing protective homes for aphids, shedding light on the battle between plants and insects.
A new research paper from Colorado State University finds that precipitation levels are the key environmental factor influencing genetic variation in the warbler's beak, which is crucial for heat retention. The study reveals that birds struggling to adapt to climate change experience higher stress levels and population declines.
Researchers at Stowers Institute for Medical Research have identified the precise location where human chromosomes break and recombine to form Robertsonian chromosomes. The study reveals that repetitive DNA sequences play a central role in genome organization and evolution, explaining how these rearrangements form and remain stable.
Researchers found genetic adaptations underlying survival in hot and dry environments, revealing how natural selection enabled the Turkana to thrive in extreme conditions. The study identified key genes, including STC1, that play vital roles in conserving water and protecting kidneys from waste.
Scientists have discovered how to potentially control harmful insect populations by studying a 'selfish gene' that manipulates inheritance. By understanding the molecular basis of this genetic mechanism, researchers believe they can identify novel methods to control certain insects that are globally significant pests and disease carriers.
A team of researchers found that a regulatory region of the genome, which controls the development of digits in mice and fish, was co-opted by evolution to guide digit formation. This discovery reveals a major evolutionary strategy of reusing existing genetic mechanisms.
Researchers found that brown anole lizards can withstand extreme lead levels without impairment. Transcriptomic analyses revealed minor effects on brain and liver tissue, with altered genes linked to metal ion regulation.
Researchers found that symbionts of reed beetles regulate gene expression according to the beetle's life stage, diet, and environmental conditions. The study shows that these bacteria can maintain a regulated metabolism with a minimal set of genes, suggesting a flexible and adaptable approach to support their hosts.
A study found that the red-headed wood pigeon's unique genetic history, shaped by centuries of gradual inbreeding, enabled its population to survive and rebound dramatically. The team's analysis revealed lower levels of highly deleterious mutations in the endangered species compared to the more widespread Japanese wood pigeon.
Researchers found that a single amino acid substitution in the ADSL enzyme affects its stability and expression, contributing to modern human differences in behavior. The study suggests that this change may have provided an evolutionary advantage in certain tasks.
The cichlid fish Perissodus microlepis has an unusual head shape due to bilateral symmetry breakdown, and its genome analysis reveals multiple genes contribute to this asymmetry. Behavioral experiences also influence the preferred direction of hunting behavior, reinforcing both genetic and morphological asymmetries.
The American Society of Human Genetics recognizes Dr. Harry Dietz for his work on Marfan Syndrome, Dr. Eric Green for his leadership in advancing human genetics and genomics, Dr. Mike Talkowski for his pioneering contributions to cytogenetics and genomic medicine, and Dr. Elizabeth Bhoj for her extensive work in translational genetics.
A large international team genetically maps glasswing butterflies across Central and South America, rewriting the evolutionary tree and highlighting six new species. This study provides answers to questions that have remained unknown for at least 150 years.
Scientists discovered that marine copepods rely on both genetic and epigenetic changes to survive climate change. Epigenetic changes, which are temporary chemical modifications, play a crucial role in helping these tiny crustaceans adapt to ocean acidification and warming conditions.