Articles tagged with Population Genetics
A new University of British Columbia study reveals that male guppies with more orange coloration are up to two times more sexually active and perform for females longer periods. The research identifies a genetic link between guppy color and behavior, suggesting healthier and fitter individuals may be more attractive to females.
Researchers at Stockholm University have uncovered the evolutionary history of the Norwegian lemming, revealing it to be one of the most recently evolved mammal species. The study found that the Norwegian and Siberian lemmings diverged approximately 35,000 years ago, with no evidence of interbreeding between them.
A study reveals that decades of overfishing have significantly altered the genetic composition of Eastern Baltic cod, leading to reduced growth rates and smaller sizes. The researchers found a correlation between slower growth and increased survival under high fishing pressure.
The new resource provides a detailed map of blood regulatory variation in South Africans, enabling researchers to interpret genetic variations using genome-wide association studies (GWAS). This innovation has the potential to uncover why people from specific genetic backgrounds may be more susceptible to certain diseases.
Researchers created a comprehensive genetic resource for Australian chickpea varieties, uncovering previously uncharacterized genetic diversity. The pangenome analysis identified 34,345 gene families, including those associated with key agronomic traits like yield, flowering time, and disease resistance.
A new study using NIH's All of Us Research Program data finds that people from the same reported racial or ethnic group can have wide ranges of genetic differences. Genetic ancestry is more complex than self-reported race and ethnicity, with significant associations between ancestry and biological traits like BMI and height.
A new study combines ancient DNA with dietary evidence and linguistics to paint a vivid picture of pre-colonial coastal communities in Papua New Guinea. The research highlights the influence of migrations and interactions on genetic makeup, supporting previous studies on the settlement of remote islands.
Researchers at the University of Florida have developed a method to analyze airborne DNA, tracking species and pathogens in the air. This technology has vast potential applications for studying wildlife, human health, and environmental monitoring.
A new genomic study offers a unique lens for understanding the extinction crisis in Hawai'i, revealing that there is still time to save the critically endangered honeycreeper 'akeke'e. With only 17 species of iconic honeycreepers remaining, efforts to control mosquito populations and conservation breeding programs are underway.
A new GCAT study corrects selection biases in population-based cohorts, improving data reliability for public health research and precision medicine. The approach achieves a substantial reduction in bias, up to 70% in demographic variables and 26% in disease prevalence estimates.
A new study analyzing ancient genomes from seven individuals in present-day Honduras provides insights into the genetic origins of the Classic Maya people and their population expansion or decline during the rise and fall of their civilization. The research contributes to our understanding of human history, population dynamics, and env...
ADHD researcher Barbara Franke's work transforms understanding of neurodevelopmental disorders through innovative molecular approaches. Her research combines cutting-edge bioinformatics with experimental models to identify genes and pathways underlying behavioral differences.
Researchers have discovered genetic properties in prostate cancer that can be targeted to improve patient outcomes, particularly for Chinese men. The findings highlight the potential of precision medicine and more effective treatments.
The study reveals that Phoenician culture spread primarily through cultural transmission and assimilation, with little direct genetic contribution from Levantine ancestors. Punic sites showcased a highly heterogeneous genetic profile, with individuals having both Sicilian-Aegean and North African ancestry.
Researchers have created the world's first Asian Immune Diversity Atlas, profiling healthy immune systems of diverse Asian populations. The study identified unique molecular properties and refined biomarkers for diagnosing diseases, which could help develop targeted therapies tailored to Asian patients.
Researchers at the University of Maryland discovered a way to predict treatment success for cutaneous leishmaniasis, a devastating skin infection. By analyzing a patient's immune system, they identified a distinctive pattern that distinguishes responders from non-responders, with 90% accuracy.
A new study deciphers ancient DNA from the Green Sahara, providing critical insights into the African Humid Period and its impact on human migration. The research reveals a unique genetic lineage that remained isolated for thousands of years, highlighting North Africa's heritage.
A novel AI-based method called scNET combines gene expression data with networks of possible gene interactions to identify biological patterns in response to drug treatments. The system reveals complex mechanisms underlying cellular behavior, providing insights for new therapeutic approaches.
Dr. Consuelo Walss-Bass shares her groundbreaking research on schizophrenia, emphasizing the importance of considering both genetic predisposition and environmental factors. She also discusses her work with induced pluripotent stem cells to develop personalized psychiatry and reduce stigma around mental health.
Researchers have found a previously unknown group of microbes, known as Asgard archaea, which possess structures similar to those found in eukaryotic cells. These discoveries suggest that Asgard archaea may be the missing link between archaea and eukaryotes, challenging our current understanding of the three domains of life.
A new study analyzing health records from 2012 to 2022 found significant differences in cardiovascular disease risk factors among Asian American, Native Hawaiian, and Pacific Islander populations. The research suggests that regular monitoring of risk factors may help prevent cardiovascular disease among these groups.
A new study highlights the need for more diversity in genomics research, as a commonly found gene variant was mistakenly linked to heart disease in people from Oceanian communities. The researchers found that the variant is actually common among healthy individuals from these regions.
Dr. Guy Rouleau, a renowned geneticist and neurologist, has founded the world's first academic institution committed to open science principles. The Neuro institute aims to transform how brain disease research is conducted worldwide by promoting data sharing and collaboration.
Researchers analyzed DNA of 370 individuals from 800 years, revealing genetic ties between Huns and Xiongnu Empire. The study found a small but distinct set of individuals carrying East Asian genetic signatures, suggesting some Hun-period individuals in Europe traced their lineage back to late Xiongnu burials.
A new study published in Nature Medicine reveals that lifestyle and environmental factors, such as smoking and physical activity, have a profound impact on health and premature death. The research suggests that targeting socioeconomic conditions, reducing smoking, and promoting physical activity can mitigate the risks of chronic diseases.
A deadly ciliate parasite has decimated sea urchin populations in the Caribbean, Red Sea, and Indian Ocean, with mortality rates reaching over 90%. The International team of researchers is working to track the disease and preserve sea urchins, which play a crucial role in maintaining coral reef health.
A genetic study of burial grounds from the Avar period in Lower Austria found that genes and culture did not have to match. The analysis revealed a high number of relatives among the deceased, reconstructing contemporary six-generation-long pedigrees at each site.
A new bioinformatics pipeline analyzes whole-genome sequencing data to accurately estimate genetic relatedness in animal populations. The tool identifies identical DNA fragments inherited from a common ancestor, revealing previously undetected relatives and providing more detailed insights into relatedness structures.
Researchers have unraveled the precise timing and functional legacy of Neandertal gene flow into early modern humans. The study suggests that most non-African individuals harbor one to two percent Neandertal ancestry, with the majority tracing back to a single shared period between 50,000 and 57,000 years ago.
A new analysis of DNA from ancient modern humans in Europe and Asia has determined that Neanderthals interbred with modern humans from approximately 50,500 to 43,500 years ago. This period of interbreeding left Eurasians with many genes inherited from their Neanderthal ancestors.
Researchers analyzed nuclear genomes of ancient European specimens to shed light on the genetics of early Europeans and their interactions with Neandertals. The study reveals a small, isolated group that interbred with Neandertals but left no present-day descendants.
Scientists emphasize the need for gene editing and plant domestication to protect food supplies due to the climate crisis. Researchers propose two strategies: introducing genes that support resistance to environmental stress into existing crops or domesticate wild plants with lower yields but higher resilience.
A new study using genetic links reveals that chimpanzee populations traded advanced toolsets across generations, demonstrating a cumulative culture. Female migrations played a key role in spreading innovation, with complex tools built upon simpler versions.
A new study from Queen Mary University of London has identified the genetic drivers of early onset type 2 diabetes in South Asians, revealing a strong link to lower insulin production and unfavorable body fat distribution. The research also sheds light on treatment responses, highlighting the need for precision medicine approaches.
Researchers found a strong link between depression and menstrual pain in a new study published in Briefings in Bioinformatics. Depression may be a cause of dysmenorrhea, rather than a consequence, according to the findings.
A recent study found that Viking colonizers of the Faroe Islands and Iceland came from different Scandinavian populations. The researchers analyzed genetic samples from 139 men and compared them to samples from Norway, Sweden, Denmark, Iceland, and Ireland, revealing a 'founder effect' that persists in today's male populations.
A new finger prick test for Alzheimer's disease has shown strong performance in a European study, measuring biomarkers in blood from superficial vessels. The test could soon be implemented globally, increasing accessibility to Alzheimer's testing without the need for high-sensitivity analyses.
A study analyzing DNA from skeletal remains in Pompeii casts reveals the cosmopolitan origin of the city's inhabitants, contradicting previous physical appearance-based assumptions. Genetic data also sheds light on ancestry, sex, and familial relationships, challenging traditional notions.
A team of researchers at the University of Toronto has discovered a unique stem cell type, the neural crest stem cell, which can be reprogrammed into different cell types. This discovery challenges longstanding theories in cellular reprogramming and highlights the potential of these cells for stem cell transplantation to treat disease.
The study shows an alternating series of interaction and gene flow between inhabitants of mountainous upland regions and steppes to the north of the Caucasus. Innovations in herd management, dairying, and mobility enabled autonomous nomadic lifestyles adapted to exploit the Eurasian steppe zone.
Researchers have successfully integrated genome sequencing into newborn screening to identify hundreds of rare genetic disorders. This approach allows for earlier diagnosis and treatment, promoting health equity and reducing time to diagnosis.
A research team, led by Francesco Ferretti, located signs of white sharks at four sites in the Sicilian Channel, a stronghold of the endangered species. The team used improved methods and technologies, including eDNA sampling and camera traps, to detect the presence of the sharks.
Researchers analyzed ancient genomes from the Oakhurst rock shelter in southern Africa, finding that the oldest genomes are genetically similar to San and Khoekhoe groups living today. The study reveals a long history of relative genetic stability until around 1,200 years ago when newcomers introduced new cultures and languages.
Researchers at JAX propose using genetically diverse mice and cell-based assays to better predict human responses to drugs and diseases. This approach has shown remarkable improvements in mimicking human diseases, offering a significant improvement over standardized but limited mouse and cellular models.
A new study finds that higher levels of six urinary metals are linked to increased cardiovascular disease and mortality in a diverse US population. The findings support the role of urinary metals as novel risk factors for CVD and all-cause mortality.
Researchers found that close household contacts of people diagnosed with geographically restricted TB strains had a lower rate of infection and active TB disease compared to those exposed to widespread lineages. This suggests a shared evolution between humans and microbes, amplifying the risk for infection.
A recent study found that 'gene misbehaviour' is a common phenomenon in the healthy human population, with over half of inactive genes showing misexpression. The researchers used advanced techniques to analyze blood samples from 4,568 healthy individuals and identified mechanisms behind these gene activity errors.
A new study published in Aging explores the potential of three large DNA methylation datasets to identify biological age signals in dogs. The researchers found that biological age methylation clocks are affected by population stratification and require heavy parameterization to achieve effective predictions.
A new study reconstructs the global migration history of Phytophthora infestans, challenging the common theory of its Mexican origin. The research found that P. infestans likely originated in the South American Andes and then spread globally.
Hybrids between two manakin species in Panama have remained relatively stable over the past 30 years, with minimal changes in genomic markers. The phenotypic transition zone also shows stability, with only one trait having shifted location, suggesting a potential selection for green bellies.
Researchers found that pentraxin 3 is a non-invasive biomarker for severe fibrosis and increased carotid intima-media thickness in patients with MAFLD. Elevated PTX3 levels were associated with advanced fibrosis and larger CIMT values.
A genetic investigation of 64 child remains found at Chichén Itzá reveals that all the children were male, indicating related male twins were likely selected for ritual activities. The findings suggest a post-sacrificial burial site, with the sacrificed individuals having been chosen for a specific reason.
Researchers reconstructed ancient genomes of Plasmodium vivax and Plasmodium falciparum malaria parasites to study their worldwide spread. The analysis revealed that European colonizers introduced P. vivax to the Americas, while military activities in Europe facilitated the spread of P. falciparum.
A new study by ECOG-ACRIN Cancer Research Group aimed to address disparities in breast cancer care for Black patients. The trial found that tailoring research to the needs of underserved groups is effective, with docetaxel showing lower rates of peripheral neuropathy and dose reductions compared to paclitaxel.
A new genetic analysis of Celtic burial mounds in Baden-Württemberg, Germany, confirms the long-held suspicion that two princes were biologically related. The study finds a close relationship between the two individuals and suggests that power structures among early Celtic elites may have been based on biological kinship.
Research from Stockholm University found that translocated pied flycatchers retain songs from their ancestral Dutch population while learning those of their new Swedish environment. This suggests that genetics play a role in shaping bird songs.
A study from North Carolina State University found that environmentally caused alterations in the genome may contribute to Alzheimer's disease risk, particularly in Black people. The research identified stable epigenetic features that distinguish Alzheimer's brains from those without the disease.
Researchers analyzed ancient DNA data from 424 individuals to reconstruct Avar community structures and social dynamics. They found strict patrilineal descent systems, female exogamy, and levirate unions, suggesting females played a key role in promoting community cohesion.
A global plan to combat the projected surge in prostate cancer cases worldwide by 2040 highlights the need for increased screening among high-risk populations. The report emphasizes the importance of targeted community outreach, including mobile vans, to provide earlier diagnoses and improve treatment outcomes.
The study revealed three genetically distinct populations of rusty-patched bumblebees, highlighting the need for tailored conservation efforts. The analysis showed low colony abundance and high rates of inbreeding, threatening the long-term viability of the species.