Articles tagged with Evolutionary Genetics
Researchers analyzed the genome of 300 individuals from 15 Mexican ethnic groups to understand their evolutionary histories and adaptability to global changes. The study found that Native Mexican peoples have biological characteristics influenced by their complex history, including susceptibility to certain diseases.
An international team of researchers identified genes associated with plant survival in the Atacama Desert, a harsh environment in Chile. These findings may help scientists breed crops that can thrive in increasingly dry climates and mitigate the effects of climate change.
A genomic study of the Tarim Basin mummies in western China found that they were direct descendants of a once widespread Pleistocene population known as Ancient North Eurasians. The mummies show no evidence of admixture with other Holocene groups, forming a previously unknown genetic isolate.
A study published in BioScience found that genetic factors contribute to concern for nature and pro-environmental behavior, with moderate heritability (30-40%) reported. The researchers also observed high genetic correlations between these traits, suggesting a partially shared genetic basis.
Researchers have identified a gene called Nup54 that plays a crucial role in regulating female reproductive behaviors in fruit flies. This discovery provides new insights into the molecular mechanisms underlying sexual conflict and its impact on evolution.
Researchers found that DNA tangles create mutational hotspots in bacterial genomes, influencing evolution. By altering the sequence to prevent hairpin tangles, they can predict how microbes might mutate under selective pressure.
A team of researchers has discovered a unique organism that lacks essential genes for copying and distributing its DNA. The free-living protist Carpediemonas membranifera is unable to produce kinetochore proteins, which separate chromosomes during cell division.
Scientists have developed a technique to sequence individual malaria parasites' genomes, allowing for the detection of new mutations. These mutations are often targeting a gene family controlling transcription in malaria, suggesting potential avenues for developing more effective treatments and vaccines.
Researchers from Washington University in St. Louis uncovered why hybridization among brown anoles is rare in their native range but common in new geographic territories. The study highlights the importance of environmental degradation in facilitating hybridization, which can contribute to biodiversity declines.
A new genetic study reveals hundreds of genes that evolved to be turned on or off in the human uterus during early pregnancy, shedding light on what makes human pregnancy uniquely human. These genes are involved in cell-to-cell communication, immune response regulation, and placental invasion, highlighting the importance of evolutionar...
Research on the giant water bug found a mismatch between its phylogenetic distance and reproductive isolation. The species' genetic differentiation is consistent with the formation of the Tsushima Strait, which separated Japan from mainland Eurasia about 1.55 million years ago.
A new study reveals hepatitis B virus (HBV) has been infecting humans for millennia, tracing its evolution from prehistory to the present. The research highlights HBV's dispersal routes and shifts in viral diversity mirroring human migrations and demographic events.
New research in zebrafish reveals the genetic mechanisms behind blue and green color vision loss in human ancestors. By studying gene editing tools and genome sequencing, experts understand how genes are regulated to detect different light wavelengths.
A more inclusive definition of infertility could help explain why current diagnostic tests frequently fail to find a reason for reproductive failure. This broader view may also open up novel opportunities for tailoring infertility treatments to each couple, considering the complex network of interacting male and female genes.
Three new species of freshwater goby fish have been identified in Japan and the Philippines, with distinct color patterns indicating separate lineages. The researchers believe that different color patterns play a crucial role in maintaining these separate lineages during courtship and mate selection.
A new study reveals that city butterflies and moths have genetically adapted to the warmer urban environment, starting their overwintering state later in the year. This allows them to take advantage of a longer growing season, reproducing successfully before winter sets in.
Biologists at Cold Spring Harbor Laboratory are using a mathematical tool to understand the complexities of gene expression and chromosomal mutations associated with cancer. The approach, developed by David McCandlish's lab, predicts how likely different variations on a biological theme are to arise.
Researchers sequenced genomes of 90 Eastern massasauga rattlesnakes and found that potentially damaging gene mutations were less abundant. This suggests that inbreeding might not be as detrimental as theory predicts, as beneficial mutations can easily purge bad ones. The study's findings could influence management decisions.
Researchers have discovered a genetic mutation called retroCHMP3 that can block the replication of certain viruses like HIV and Ebola by disrupting their ability to exit an infected cell. This finding has the potential to lead to the development of new medical interventions against these deadly diseases.
Researchers have identified a series of genetic switches, called enhancers, that ensure the correct amount and distribution of Gremlin1 protein during embryonic development. This discovery sheds light on the evolutionary history of human limb development and highlights the importance of robust gene networks in shaping our body's form.
A study by Johannes Gutenberg University Mainz found that genetically diverse ant colonies produce more larvae than those with similar genetic backgrounds. This improved division of labor allows for more efficient task allocation, leading to better colony performance.
Researchers have identified a shortened version of the human growth hormone receptor gene, GHRd3, which may help people survive in situations where resources are scarce or unpredictable. The study found that this variant emerged around 1-2 million years ago and was more prevalent in ancient humans and Neanderthals.
A medieval Spanish individual, known as the 'Segorbe Giant,' has been analyzed using ancient DNA. The research found that he had a mix of North African and local Spanish ancestry, suggesting a complex history of migration and intermixing. This study sheds light on a dark event in medieval Spain's past.
Scientists prove Meselson effect in ancient asexual species, showing survival without sexual reproduction is possible. The study of beetle mite Oppiella nova reveals genetic variance and adaptation through independent genome evolution.
New research reveals that the evolution of cichlid jaws is linked across multiple levels, challenging a quarter-century-old assumption. This finding highlights the importance of evolutionary constraints in shaping biodiversity, and suggests that they may play a wider role in the evolutionary success of species around the world.
Researchers have developed a sophisticated new tool to detect and identify rare and unknown viruses and potentially deadly bacterial pathogens. The algorithm helps isolate DNA sequences shared among related organisms, enabling faster detection and identification of pathogens in clinical or wildlife settings.
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.
Researchers found that viral fossils in Australian marsupials are used to make non-coding RNAs that protect against outside infection. The study suggests that these viral fossils may be helping to immunize animals, potentially providing a mechanism similar to vaccination.
Researchers successfully used cryopreserved sperm to fertilize coral eggs from hundreds of miles away, demonstrating the reproductive compatibility of distant coral colonies. The technique, known as assisted gene flow, has potential as a conservation tool for endangered corals and could accelerate their adaptation to climate change.
A comparative genomic study of 57 mammal species identified over 2,000 new genes linked to longevity in humans. These genes are involved in DNA repair, coagulation and inflammatory response mechanisms, and codify more stable proteins in longer-living species.
A whole genome analysis of a Staphylococcus aureus collection recovered from Cape Verde reveals high genetic variability among isolates. The study identifies three primary genetic clusters associated with lineages ST152, ST15, and ST5, commonly found in S. aureus infections worldwide.
A decade-long study by University of Wisconsin-Madison researchers shows how aspen stands change their genetic structure over time, adapting to environmental fluctuations. The findings suggest that exposure to various environmental changes can maintain diverse forests capable of responding to different stresses.
A recent study has identified nearly half of the fastest-evolving human genes as playing a crucial role in rewriting the course of human brain development. The research used an innovative approach called CaptureMPRA to analyze the function of Human Accelerated Regions (HARs) in regulating gene expression in the brain.
Research reveals cichlids exhibit highly dynamic sex chromosomes, transitioning between XY and ZW systems. Genome analysis identified over 70 species with distinct sex-determining genes.
Researchers analyzed skunk DNA to determine the correct number of species, revealing seven species, including the previously recognized four. The revised family tree highlights the distinct evolutionary lineages of each species, making conservation efforts more effective.
Researchers sequenced the bowfin genome to investigate its unique combination of ancestral and advanced features. The study found unexpected insights into diverse aspects of bowfin biology, including the absence of key genes in its pectoral fin.
Researchers at McGill University have developed a new way to track genetically modified animals using artificial transgenes. The discovery provides a powerful tool for locating and managing escaped or released GM animals.
A Spartan-led team has assembled the most complete picture of the bowfin genome to date, revealing striking similarities between bowfin gas bladder development and human lung development. This breakthrough provides a better model for studying human health and disease, with potential implications for understanding evolutionary history.
Researchers created a model to estimate viral population variability using epidemiological data, predicting the emergence of novel variants. The study suggests that lack of vaccination increases mutation frequency and spread.
Scientists have discovered that ferns can actively close their stomata in response to low humidity or the hormone ABA, similar to flowering plants. This finding confirms that the earliest land plants were able to control water loss through stomata, providing valuable insights into plant evolution and climate change adaptation.
The New Roots for Restoration Biology Integration Institute aims to integrate plant traits, communities, and the soil ecosphere to advance restoration of natural and agricultural ecosystems. The project seeks to understand how root traits influence plant interactions with each other and with the soil.
Researchers discover that gastrin-releasing peptide (GRP) is widely conserved among vertebrates, but the NMB/bombesin system has diversified in some lineages. GRP has evolved independently from a single ancestral homologue and plays a role in regulating energy intake and expenditure in both amphibians and mammals.
A new study has identified 20 genetic regions linked to face shape in East Africans, highlighting the importance of diverse populations in understanding human facial features. The findings also reveal that shared genetic factors contribute to similarities across populations, while population-specific variants drive differences.
Researchers reconstructed genetic histories and social organization in two ancient Croatian sites, uncovering a diverse population with little biological kinship. The study found that individuals from different burial rites had similar genetic ancestry, but also identified endogamous mating practices and patrilocal social organization.
An international team found the genetic basis for the seadragon's lack of teeth, leaf-like appendages and sex-determination gene. The research also showed that males care for fertilized eggs until they hatch.
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 new study by Professor Danika Bannasch and colleagues reveals that five distinct dog coat patterns have an ancient origin, dating back over 2 million years. The research suggests that lighter coat colors would have been advantageous to an extinct canid ancestor in arctic environments during glaciation periods.
A team of researchers has cracked the code on dog coat color patterns by identifying five distinct genetic variants that cause different colors. These variants originated in an extinct species and were introduced into modern dogs through hybridization events.
Flipon genetics proposes that evolution happens on a faster time scale than Darwin imagined, with rapid adaptations occurring in real-time within individuals. This is achieved through the simple sequence repeats of DNA, which can adopt alternative shapes and transmit adaptations to offspring.
Researchers at Rice University are developing novel computational approaches to track environmental microbiome dynamics over time, across species and after perturbations. The team will use biofilm-based 'species abundance networks' on scaffolds to observe how they form their own genome-exchange networks.
Researchers discovered an enzyme from Amazon fungus Trichoderma harzianum capable of breaking down diverse plant biomass sugars, enhancing the efficiency of second-generation ethanol production. The enzyme's industrial use is now viable at low cost due to genetic engineering techniques.
A new study published in Genome Biology found that the ability of gut bacteria to produce spores is associated with their adaptation to humans. Bacteria that can produce spores have larger genomes and are less abundant in the gut, while those that cannot have smaller genomes and are more adapted to human hosts.
Researchers mapped genetic control elements of active genes in the mouse cerebellum, identifying over 200,000 control elements and a temporal pattern shared between different cell types. The study also shed light on the evolution of gene regulatory programmes in mammals.
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.
Researchers have discovered a rare class of inherited genetic variants associated with autism, revealing new potential causes and pathways. These variants, less damaging than previously thought, contribute almost as much risk to the condition.
New study reveals Sulawesi Babblers have diversified rapidly over a short period of time due to their understorey lifestyle, changing genetically, physically and behaviorally. The research suggests that these birds can evolve quickly even in relatively small geographic areas.
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 recent study found that genome-wide association studies (GWAS) often miss important associations between genotype and phenotype due to high genetic heterogeneity, but examining smaller, genetically homogeneous samples yields valuable new insights
Researchers found menopause in two distinct killer whale ecotypes, with striking similarities between them. The study suggests that the evolutionary benefits of grandmothering may be a key factor in the development of menopause.
Scientists have discovered a species of algae with three sexes - male, female, and bisexual - which can breed in pairs, shedding new light on the evolutionary transition to self-compatible mating systems. This phenomenon is rare among living organisms, but researchers believe it may not be as uncommon as previously thought.