Articles tagged with Population Genetics
A new study from Lund University reveals that PCA, a widely used statistical method in population genetics, is deeply flawed. The method can produce flexible and unreliable results, leading to misconceptions about ethnicity and genetic relationships.
A new study from Lund University reveals that the most common analytical method in population genetics is deeply flawed, leading to incorrect results and misconceptions about ethnicity and genetic relationships. The method has been used in hundreds of thousands of studies, including medical genetics and commercial ancestry tests.
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 by OIST Graduate University's Marine Biophysics Unit found that mangroves in the Ryukyu Islands have limited connectivity, making it crucial to protect isolated forests. The research used genetics and oceanography to track propagule dispersal, revealing rare genetic exchanges between islands.
The Sixty-third Supplement to the Check-list of North American Birds updates bird classifications, including meadowlark species splits, hummingbird recognitions, kite separations, and the addition of a giant-petrel. New subspecies are also recognized for some bird species, reflecting advances in genetic analysis.
A large genomic study of snapper has identified three distinct oceanic snapper populations between Shark Bay and Ceduna in South Australia. The populations are genetically distinct and have unique geographical ranges, suggesting that snapper can make long-distance movements.
Researchers have discovered rare colonies of Rock Doves, the wild ancestors of common domestic and feral pigeons, on secluded Scottish and Irish islands. The findings provide valuable insights into how the domestic pigeon came to be, with varying degrees of interbreeding between the two forms of the species.
A previously unknown subpopulation of polar bears living in Southeast Greenland has been genetically distinct and uniquely adapted to its environment. The study provides insight into how the species might persist into the future, but highlights the need for careful extrapolation due to limited access to sea ice.
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 world-first study from the University of South Australia found a direct link between vitamin D deficiency and increased risk of dementia and stroke. The study analyzed data from 294,514 participants and found that up to 17% of dementia cases might have been avoided by boosting vitamin D levels.
A study found that around one in 500 men carry an extra sex chromosome, putting them at increased risk of several common diseases. Men with XXY or XYY chromosomes have higher risks of reproductive problems, type 2 diabetes, and other health conditions.
Researchers analyzed 16 ancient genomes from Wallacea, revealing striking differences between regions and a previously unknown ancestry contribution from Mainland Southeast Asia. The findings suggest multiple human dispersals into Wallacea and major implications for the understanding of Neolithic dispersals into Island Southeast Asia.
A massive global study of diverse populations has significantly advanced the understanding of type 2 diabetes by identifying 117 genes that contribute to the disease. The research used genetic data from almost 181,000 people with type 2 diabetes and 1.16 million without it.
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.
The trial evaluated the use of mavacamten as an alternative to heart surgery or alcohol septal ablation for treating hypertrophic cardiomyopathy. Findings showed significant reduction in left ventricular outflow tract pressure gradient and improvements in quality-of-life measures.
A multidisciplinary team analyzed ancient DNA from the Carpathian Basin to reveal clues about the Avars' origins. The research found that the Avar elites had ancestry from Northeast Asia and the North Caucasus, suggesting a rapid trans-Eurasian migration
Scientists at UC San Diego are working on next-generation gene drive systems based on CRISPR technology to combat malaria and reduce mosquito populations. The $1.4 million grant will support the development of new technologies, including a neutralizing system called ERACR, to mitigate risks associated with gene editing in mosquitoes.
Researchers are combining optogenetics and fMRI to study the links between brain activity and behavior. This hybrid approach allows for targeted manipulation and monitoring of brain function in awake and behaving rodents, providing valuable insights into neural mechanisms.
A new Brazilian database of whole-genome sequences brings diverse genetic information to international databases, shedding light on the genetics of aging and disease in Brazil's elderly population. The study identified over 2 million novel genetic variants, providing insights into the health and well-being of older adults.
Researchers from OIST found that Escherichia coli bacteria form lanes of genetically similar individuals when constrained to a channel, aligning parallel to the barriers. The study, published in PNAS, used microfluidic platforms and simulations to observe population dynamics over several generations.
A comprehensive genetic study found actionable pharmacogenomic variation affecting drugs in the Qatari population, highlighting diverse distribution of variants compared to other world populations. The study suggests potential implications for preemptive pharmacogenomic implementation in Qatar and beyond.
A genetic database has been created in El Salvador to help identify missing persons and victims of the country's civil war. The database, which includes 400 individuals, uses advanced sequencing technologies to assess genetic relationships between remains and relatives.
Researchers have identified genes associated with spinach's resistance to downy mildew and its levels of oxalates. The findings could help breeders produce disease-resistant varieties with more consumer appeal, improving spinach's market prospects.
A study by UC Riverside scientists has identified a set of genes on a single chromosome associated with the production of male or female offspring in ant colonies. The discovery sheds light on the complex relationships between genetics and environmental factors in shaping the sex ratio of these societies.
A new study from the University of South Australia found that vitamin D deficiency is associated with a higher risk of heart disease and higher blood pressure. Increasing vitamin D levels in deficient individuals may prevent up to 4.4% of all CVD cases, according to the research.
A new study tracked the spread of a genetic mutation that causes young-onset heart arrhythmia across continents over centuries. The research found that the mutation was passed down from Northern Europe to other parts of the world through migration, and identified a specific gene, KCNQ1, as the cause of the disease.
A high-resolution map of Arab and Middle Eastern population genetics has been unveiled, providing new insights into human history in the region. The study revealed that ancient populations in the Arabian Peninsula played a central role in early human migration out of Africa.
Researchers found that heritage-specific diets varied across Latinx groups, with Mexican and Puerto Rican diets being healthier. The study suggests that longer years living in the US may lead to less healthy dietary patterns among Cuban, Mexican, and Puerto Rican groups.
Researchers analyzed 1,785 ancient human genomes to determine parental relatedness, revealing that cousin marriages occurred only 3% of the time. The new method allowed for more efficient screening of ancient DNA, also providing insights into population dynamics and demographic impact of agriculture.
A new study using Neanderthal fragments suggests that generation intervals have fluctuated over the past 40,000 years, with human life history changing in response to environmental and cultural factors. The research found that Eurasian populations reproduced at a younger age than those in Europe, indicating a difference of 3-5 years in...
A new study identifies at least three migratory events that shaped central European prehistory, revealing a more dynamic period than previously thought. Genetic profiles show evidence of recent migrations and novel insights into social processes, such as the expansion of Corded Ware culture and the assimilation of women.
A 7,000-year-old human skeleton from Sulawesi has provided new insights into ancient human relations. The genome analysis shows a connection to the first modern humans to reach Oceania and a mix of Denisovan and Asian genetic components.
Researchers identified distinct epigenetic patterns associated with heart disease in diverse populations, offering potential early warning signs. The study analyzed genome data from four cohorts and found unique methylation points linked to coronary heart disease.
Researchers sequenced DNA from plant specimens collected nearly 50 years ago to analyze genetic diversity and its response to climate change. The study found that several species restricted to the Guadalupe Mountains had surprisingly high amounts of genetic diversity, which could help them adapt to changing conditions.
A single butterfly species introduced to an island in the 1990s had a significant impact on several insect populations, leading to genetic decline and high extinction risk for some species. The parasitoid wasp's mobility and symbiotic bacterial relationships played key roles in shaping this outcome.
Researchers identified a novel lncRNA, Teshl, which plays a crucial role in the development of Y-bearing sperm and regulates sex chromosome gene expression. The study provides new insights into sex ratio variations and suggests that genetics may be a key factor in human male infertility.
Researchers analyzed Neandertal and Denisovan genomes to identify blood groups, confirming their African origin and Eurasian dispersal. The study also found evidence of low genetic diversity and possible demographic fragility, shedding light on the disappearance of Neandertals.
A genetic analysis of brook trout in Loyalsock Creek drainage reveals that fish are moving between tributaries, using the mainstem as a seasonal corridor. This finding contradicts previous research and suggests that conservation efforts should focus on larger streams and rivers to protect critical movement corridors.
Researchers find gene drives more efficient than releasing immune mosquitoes in controlling mosquito populations spreading malaria parasites. The study demonstrates the effectiveness of gene drives in driving mosquito populations to extinction, with some mutations hindering their effectiveness.
A study identifies 5 genetic markers near the EGLN1 gene linked to high-altitude adaptations, suggesting natural selection in these populations. These markers were found at higher frequencies among 429 Quechua people from Peru compared to lowland populations.
A new genomics study explores the genetic signatures of a pair of wolves isolated on Isle Royale, revealing the impact of inbreeding on the population's health. The research found that close inbreeding leads to genetic anomalies, which are likely driving the wolf population crash over the past decade.
Inbred Isle Royale wolves have fewer harmful genes than expected, with a higher proportion of paired recessive alleles. This discovery has broader implications for conservation efforts, suggesting individuals from smaller populations may be more beneficial due to fewer potentially harmful alleles.
A recent study found that Australian potato cyst nematodes have a single origin, suggesting effective quarantine control measures. Historical specimens were analyzed using modern technologies to determine the pest's introduction and spread in Victoria, Australia.
Researchers found cold-resistant phenotypes in Alaskan Iñupiat and immune response genes in central Mexican and southeastern US populations. Genetic adaptations varied depending on population history and geography.
New research by University of Alberta biologists reveals the Stone's sheep population is 20% less common than previously estimated. Genetic analysis shows significant overestimation of certain subspecies due to misclassification, leading to a more accurate estimate.
A study published in Nature Scientific Reports found that nuclear DNA analysis can highlight genetic differences between sardine populations, contradicting previous conclusions based on mitochondrial DNA analysis. This new understanding has significant implications for fisheries management and conservation strategies.
A large-scale study led by the Weizmann Institute of Science found that diet and lifestyle are the primary factors shaping our microbiome composition. The research suggests that understanding these influences may be key to improving health and treating common diseases.
Research on mitochondrial DNA from ancient remains suggests that two distinct groups, Maritime Archaic and Beothuk, inhabited the island multiple times with a possible hiatus. The findings imply that Newfoundland's population history involves multiple independent arrivals by indigenous peoples.
Scientists warn of alarming gaps in basic knowledge of deep sea life as human activities intensify. Despite this, recent technological advancements enable the collection of genetic information about populations, shedding light on their interconnectedness.
A study found that green anole lizards in the south developed greater resistance to cold temperatures after a severe winter, similar to their northern counterparts. The population showed significant genetic divergence in response to the extreme weather event.
Daniel MacArthur receives ASHG's first Early-Career Award for his work on rare disease diagnosis using large-scale genomic technologies. The award recognizes his development of key resources, including Exome Aggregation Consortium and Genome Aggregation Database.
Kári Stefánsson to receive William Allan Award for his pioneering work on Icelandic population genetics and its impact on public education about genetics. His research has led to important insights into various diseases, including type 2 diabetes, prostate cancer, and schizophrenia.
Researchers explored genetic similarity between spouses from three generations of white people in the Framingham Heart Study. They found that individuals preferred spouses with the same ancestry, but this preference decreased over time, resulting in a more genetically diverse population.
Researchers found that genetic modifications are unlikely to conquer Earth due to natural resistance. Gene drives, like CRISPR/Cas9, can spread quickly but will eventually be outcompeted by natural selection.
A new study suggests that deep coral reefs are unlikely to 'reseed' shallow reefs, contradicting previous hopes for their recovery. The research found that the genetic similarity between coral populations varies greatly between species on a reef, making it difficult for deep reefs to aid shallow reefs.
Scientists sequenced DNA from early Neolithic skeletons and found a previously uncharacterized population in Iran's Zagros region. The Zargos-based farmers' genetic sequences resemble modern-day Pakistani and Afghan populations, suggesting they split from ancient Anatolian genomes over 40,000 years ago.
A study reveals a deep indigenous genetic history tracing back to the initial settlement of Australia 50 thousand years ago, challenging previous theories about an influx of people from India. The findings show a long and independent genetic history in Australia.
A physically active lifestyle can substantially decrease the genetic effect of the major obesity gene FTO on body weight in a multiethnic population. Researchers at McMaster University found that physical activity can blunt the effect of inherited obesity genes by up to 75 per cent.
Researchers have identified two distinct species of little blue penguins in Australia and New Zealand, based on genetic analysis. The study reveals that the birds' calls and mating habits differ between the two populations.
A recent study using fecal sampling and genetic analysis found hundreds of eastern chimpanzees inhabit a region of rapidly shrinking forest fragments in Uganda. The population is estimated to be between 250-320 individuals, three times larger than previously suspected.