Articles tagged with Gene Flow
The study of Ötzi's genome reveals surprisingly high levels of Anatolian Farmer ancestry, indicating a genetically isolated Alpine population. The findings also suggest that Ötzi had dark skin, dark eyes, and male pattern baldness, contradicting previous reconstructions.
Scientists discovered that climate shifts during the last 400,000 years influenced the frequency of Neanderthal-Denisovan interbreeding. The researchers found that temperature changes triggered habitat overlaps, leading to increased contact between the two species.
A University of Ottawa-led research team has made significant progress in understanding XLP-2, a genetic disorder that affects the immune system. The study reveals two underlying mechanisms: poor expression of Interleukin-6 and compromised T cell survival, which lead to immunodeficiency in patients.
A KAUST-led team has compiled the first complete genome map of einkorn, an ancient grain that could help develop bread wheat varieties with enhanced disease resistance and improved hardiness. The study reveals a complex evolutionary history of wheat species, including gene flow between einkorn and wild cousins.
Researchers discovered a 40,000-year-old gene flow event between an extinct gorilla ghost population and the common ancestor of eastern lowland gorillas and mountain gorillas. This exchange introduced genes that are still present in today's eastern gorillas, including a bitter taste receptor gene under positive selection.
A study found that a gene variant common in Black individuals may contribute to higher severity of stroke. Mice carrying the variant showed heightened reactivity and greater disability after a stroke, highlighting the need for personalized medicine based on genetics.
A novel molecular pathway has been identified, explaining how a mutation in the ACTA2 gene can cause individuals in their 30s with normal cholesterol levels to develop coronary artery disease. The mutation leads to stress in smooth muscle cells, triggering the production of excess cholesterol and driving atherosclerotic plaque formation.
A study by US Department of Agriculture scientists found that honey bees are more faithful to their flower patches than bumble bees. Honey bees returned to 76% of the same alfalfa flowers, while bumble bees visited only 47%. The difference may be due to honey bees' communication system and risk aversion.
A research group at Nagoya University used AI to determine that Piezo plays a crucial role in controlling the mating posture of male fruit flies. Inhibition of Piezo led to an ineffective mating posture, resulting in decreased reproductive performance.
A new study sheds light on the genetic heritage of chickpeas by analyzing landrace genomics from over 400 specimens collected in the 1920s and 1930s. The research reveals that the spread of chickpeas within each region occurred predominantly along trade routes, rather than through simple diffusion.
A preclinical study has uncovered the role of Y chromosome gene KDM5D in regulating anti-tumor immune responses and promoting metastasis in male patients with KRAS-mutated colorectal cancer. The study reveals that mutant KRAS drives upregulation of KDM5D, leading to reduced cell adhesion and immune recognition by the immune system.
Scientists at UCSF and NIBSC have developed two new oral polio vaccines with genetically engineered weakened poliovirus to reduce reversion to dangerous forms. These vaccines aim to boost the World Health Organization's efforts to eradicate polio, which has persisted despite successful international vaccination campaigns.
Researchers found that giraffes on either side of the rift have not interbred for over 1,000 years, with females showing no signs of migration. The study suggests that Masai giraffes are more endangered than previously thought, requiring separate but coordinated conservation efforts.
Recent studies reveal complex patterns of admixture in human populations, particularly in Africa and the Americas. In Africa, ancient introgression from Neanderthals and Denisovans contributed to increased genetic diversity, while in the Americas, modern admixture resulted in redistributed archaic ancestry.
A recent study published in Nature challenges traditional views on human origins in Africa, proposing that modern humans emerged from the interaction of multiple populations across the continent. By analyzing genomic data from diverse African groups, researchers found evidence of gene flow and mixing over hundreds of thousands of years.
A new study led by UCL researchers found evidence of ancient empires' impact on migration in Africa, revealing genetic traces from across the continent. The study used DNA data from over 1,300 individuals from 150 ethnic groups, identifying migrations linked to empires like Kanem-Bornu and Aksum.
Geneticists used Ashaninka DNA to uncover a strong hint of a South-to-North migration that led to the transition from an archaic to ceramic culture in Caribbean islands. The study provides new insights into pre-colonial American history and highlights the importance of microgeographic studies.
A recent genomic study identifies two genetically distinct Ashaninka subgroups, suggesting a complex history of interactions with neighboring populations. The research also hints at a possible migration from southeastern South America or the Southern Cone, shedding new light on the genetic origins of this Indigenous group.
A genomic study of 180 indigenous Africans provides new insights into human history, biology, and population diversity. The research sheds light on the origin of modern humans, African population history, and local adaptation, including traits such as skin color, heart development, and immunity.
Researchers from McGill University found that changes in sea levels during the Ice Age affected crocodile gene flow, isolating Caribbean and Pacific populations with distinct genetic mutations. The study reveals the resilience of American crocodiles to climate swings and highlights the need for targeted conservation efforts in Panama.
Researchers analyzed ancient genomes from ten individuals up to 7,500 years old in Siberia, revealing a previously unknown hunter-gatherer population that contributed to many contemporaneous and subsequent populations across North Asia. The genetic data show a mix of paleo-Siberian and Ancient North Eurasian people, with links to hunte...
A new study analyzes 48 ancient human genomes and over 16,500 modern Scandinavian genomes to reconstruct the region's genetic history. The research shows that ancestries introduced during the Viking period later declined, suggesting ancient immigrants contributed proportionately less to the modern gene pool.
Composite wastewater samples taken over 24 hours reveal a more accurate representation of antibiotic-resistant genes, with levels 10 times higher than 'snapshots'. Chlorination can negatively impact water quality, highlighting the need for improved treatment protocols.
A global study reveals that antimicrobial resistance genes in bacteria are driven by various factors, including geographic regions and hosts. The research identifies key genes conferring resistance to critically important drugs, shedding light on the mechanisms of transmission and the need for collaborative interventions.
A group of biologists is exploring the potential of seed banks, frozen zoos, gene editing, and assisted gene flow to create second chances for species affected by climate change. By understanding local adaptation strategies, conservationists can design more effective conservation actions.
Researchers used DNA from two ancient human individuals to unravel the deep demographic history of South America, providing new genetic evidence supporting existing archaeological data. They also discovered migrations along the Atlantic coast for the first time and found evidence of Neanderthal ancestry within ancient genomes.
A recent genetic study has found that three-quarters of the Early Medieval population in Eastern England was comprised of migrants originating from Continental regions bordering the North Sea. These migrants intermarried with local populations, but integration varied greatly from region to region.
Scientists found that weedy rice has developed herbicide resistance through gene flow from crop rice, with most fields showing resistant plants within 20 years of herbicide-resistant rice cultivation. This rapid evolution is due to the close proximity of weedy and crop rice in the same fields, allowing for pollen transfer and outcrossing.
The University of Guam is conducting a four-person research team's study on the genetics of corals from the Northern Mariana Islands to understand coral population connections, diversity, and adaptations. The study aims to identify potential reserves for declining reefs and assess the impact of warming waters.
A study on harbour crabs reveals that changes in oceanographic fronts alter gene structure, affecting connectivity among populations. The research provides data to improve conservation policies for these crustaceans.
A study of ancient DNA from a 100,000-year-old polar bear genome found that extensive hybridization between polar bears and brown bears occurred during the last warm interglacial period. As a result, all living brown bears today have some polar bear ancestry.
A comprehensive genetic analysis of the native people in China's southwestern region reveals a more complex peopling and migration history than previously thought. The study found that all ethnic groups are genetically similar, suggesting a common ancestor, but with closer relationships to Tibetan Highlanders and southeast Asians.
Human activity on Hainan Island is causing changes in the body shapes and diets of tropical birds, resulting in biotic homogenisation. Despite efforts to protect biodiversity, the island's unique ecosystem is being affected by large-scale economic and land-use changes.
Scientists found a protective gene that counters a deleterious mutation causing atrial septal defects, allowing some people with the mutation to thrive. The discovery provides valuable clinical information for families affected by congenital heart disease.
A recent study published in PLOS Genetics found that genetic legacy from the last glaciation influences reindeer's migratory behavior. Caribou with more northern ancestry were more likely to migrate longer distances, highlighting an evolutionary adaptation to harsh tundra environments.
A study at the University of Helsinki identified a link between early sexual maturation and improved aerobic performance in juvenile salmon. Genetic variations associated with early maturity were found to enhance basal metabolism and energy production, leading to better overall performance.
Two studies highlight significant migration to Great Britain that replaced 50% of the island's ancestry during the Late Bronze Age. The analysis also reveals a dramatic increase in milk tolerance around 1200 B.C., providing new insights into dairy consumption in Britain.
A recent study found that whale sharks in Panama may originate from the Arabian Gulf and Western Indian Ocean, highlighting their ability to travel long distances. This discovery underscores the need for transboundary conservation measures like marine corridors to protect this endangered species.
New study finds that modern Japanese populations have a tripartite genetic origin, with contributions from Jomon hunter-gatherers, Yayoi farmers, and Kofun peoples. The analysis reveals a complex history of population dynamics, including assimilation rather than replacement during the agricultural transition.
Researchers sequenced the genomes of an ancient date palm leaf and found evidence of hybridization with wild relatives. The study sheds light on the evolution of date palms in North Africa, showing that genetic material from another species was present 2,200 years ago.
A new study from Oregon State University and the U.S. Department of Agriculture's National Wildlife Research Center found that beavers in the Coast Range of western Oregon exhibit relatively strong genetic differentiation, shaped by watershed boundaries and past relocations. The researchers recommend relocating beavers within watershed...
A new study in Genome Biology and Evolution reveals extensive gene flow among butterfly lineages, resulting in a network of related species rather than a simple tree. This challenges traditional models of evolution and highlights the importance of adaptive introgression in shaping species diversity.
A study found that wind patterns strongly affect genetic differentiation, gene flow, and genetic diversity in tree populations. Downwind populations tend to exhibit high genetic diversity.
Researchers from the University of Helsinki have successfully determined annual changes in genetic ancestry within Finland, tracing migration patterns and effects of 20th-century events. The study uses reference datasets compiled from samples collected in the FINRISK study and provides an interactive map for browsing results.
Researchers identified a single gene, ADCY8, associated with migration in peregrine falcons, which is also linked to long-term memory. The study predicts that climate change may lead to population decline and migration patterns changes in western Eurasian peregrines.
Researchers have shown that new ecological variants can evolve within thoroughly mixed yeast populations, diverging into distinct phenotypes and genetic classes. The emergence of these differences is attributed to newly acquired mutations in 50:50 mixtures, rather than the selection of existing variants.
A new study found that manatees in Brazil and Guyana have low genetic diversity, with no natural hybridization between species. The researchers suggest creating protected areas and biological corridors to promote gene flow and improve conservation efforts.
A recent study sequenced genomes of 150 individual coral colonies to understand the evolution and survival of the Great Barrier Reef. The researchers discovered genes that rapidly evolved to endure changing conditions, including a set of genes that developed over the past 10,000 years.
African elephants in Tanzania show limited gene flow between protected areas, highlighting the importance of preserving wildlife corridors for conservation. The study found that some areas, like Lake Manyara and Ngorongoro Conservation Area, were once connected but now have limited genetic exchange.
New research at Uppsala University reveals Swedish, Finnish and Russian wolves share a common genetic constitution, indicating a virtually pure origin from Finland and Russia. Genetic analysis of over 200 wolf samples found no evidence of hybridization with dogs in the Fennoscandian wolf population.
A new algorithm reveals evidence of interbreeding between ancient humans and their relatives, with some humans carrying DNA from an unknown archaic ancestor. The study suggests that genetic exchange occurred frequently among overlapping groups.
Jan Philipp Junker and his team will use a combination of experimental, sequencing, and machine learning tools to reconstruct gene regulatory networks in normal embryonic development of zebrafish. This could lead to new treatments for diseases such as cancer and heart disease.
A recent study by Uppsala University and Princeton University found that gene flow between closely related species of Darwin's finches has affected their beak morphology. The researchers observed a convergence in beak shape among hybrids, which they attributed to gene flow from the medium ground finch to the common cactus finch.
Researchers found that Iranian populations, such as Persians and Kurds, display high in-group genetic variation. However, the entire gene pool has remained largely unchanged over at least 5,000 years. This discovery sheds light on past migration movements and provides valuable data for studying genetic diseases.
Researchers identify VPS13A gene associated with migratory behavior in golden-winged and blue-winged warblers, shedding light on the complex genetic factors behind bird migration. The study's findings may have important conservation implications for declining populations of these species.
Researchers developed a simple measurement of gene flow to define microbe populations, separating co-existing microbes in genetically and ecologically distinct groups. This approach identifies parts of the genome that show different adaptations, enabling pinpointing of populations associated with health conditions like Crohn's disease.
Scientists studied the impact of fragmentation on Dahl's toad headed turtle populations in Colombia, finding restricted gene flow and genetic erosion. They recommend gene flow restoration via genetic rescue to counteract these threats and provide guidance for this strategy.
Researchers have reconstructed an 8,000-year genetic history of the Iberian Peninsula using ancient DNA from over 270 individuals. The study reveals complex population structures and unexpected interactions with North Africa and the Pontic-Caspian steppe.
Researchers found evidence of sheep, cow, and goat milk consumption in late Bronze Age human remains from Mongolia. Genetic analysis revealed limited gene flow between western and eastern steppe populations, but cultural transmission led to the adoption of dairy herding in Bronze Age Mongolia.
A recent study has identified 24 genes that are differentially expressed in rats with cerebral aneurysms compared to those without. These genes may enable the development of diagnostic biomarker tests for patients at increased risk of cerebral aneurysm formation.