Articles tagged with Evolutionary Genetics
A study by researchers at the University of Innsbruck discovered that the Cranial Sensory Ganglia in vertebrates shares a common genetic origin with Bipolar Tail Neurons found in tunicates. This finding suggests that Hmx, a gene conserved across evolution, played a crucial role in the formation of highly specialized sensory organs.
A study on Arabidopsis thaliana found that a two-step molecular process rewired nutrient transport, allowing the plants to thrive in manganese-limited volcanic soil. The discovery provides insights into nutrient homeostasis and has implications for evolutionary biology and crop improvement.
The first farmers emerged from a population admixed between hunter-gatherers from Europe and the Near East, with a mixing process starting around 14,000 years ago. Genetic data from prehistoric skeletons were analyzed using novel demographic modeling techniques to reveal complex population dynamics.
Researchers found that jellyfish's stinging cells evolved by repurposing a neuron inherited from a pre-cnidarian ancestor. This discovery provides insights into the emergence of new cell types and the evolution of biodiversity, suggesting that co-option of ancestral cell types was an important source for new cell functions.
Researchers studied cavefish genome-wide map of liver tissue to understand metabolism evolution and its potential applications for humans. The study found striking similarities in metabolic adaptations among cavefish populations, raising questions about universal adaptation mechanisms that could be triggered in other species like humans.
A study by UAB and University of Kent researchers found that the 3D structure of male germ cells plays a key role in determining genome evolution. Genome rearrangements were associated with DNA damage locations in spermatids, suggesting that males have a unique impact on genome evolution.
Researchers identified a region of the mouse genome associated with higher mutation rates, which is linked to a specific gene called Mutyh. This finding supports the theory that genetic differences can affect mutation rates, and may also shed light on cancer susceptibility.
Researchers at King Abdullah University of Science & Technology (KAUST) have identified a stem rust resistance gene in Aegilops sharonensis and transferred it to common wheat. The new transgenic wheat lines show high levels of resistance to the stem rust pathogen, providing hope for mitigating the devastating effects of climate change.
A new genetic analysis suggests that vaquitas can recover if deaths from gillnets are halted, despite initial concerns about inbreeding depression. The species' natural resilience and genetic diversity provide a high probability of survival.
A study of historical tiger shark jaws reveals a local southeastern Australian population has been extirpated due to shark control programs, emphasizing the need for regional management and conservation. Genetic diversity drives future evolution, and its loss can lead to reduced adaptability to environmental changes.
Researchers at the University of Illinois have successfully engineered artificial photosynthetic life-forms through endosymbiosis between cyanobacteria and yeast. The engineered chimera can survive and reproduce under optimal conditions, shedding light on the evolutionary origins of eukaryotic cells.
A large-scale international study, led by Tel Aviv University's Dr. Omri Bronstein, found that many species of echinoids, including sea urchins, survived a mass extinction event 50 million years earlier than thought. The findings suggest that estimates of evolutionary timelines may err by tens of millions of years.
A research team from the Max Planck Institute for Terrestrial Microbiology has identified 1,000 biosynthetic gene clusters, over half of which are previously unknown. These natural products have been found to be eukaryotic proteasome inhibitors that suppress the immune system of insects, as well as other virulence factors.
The study found that cultivated kumquat species have an independent phylogeny among citrus taxa, rejecting the hybridization origin hypothesis. The populations underwent directional selection during their evolutionary trajectory, and the asynchronous population dynamics were earlier than human activity in southern China.
Researchers studied peptide bond formation between tRNA molecules and a ribosomal RNA segment, revealing the potential for minihelices to bind to the primordial peptidyl transferase center. The study suggests that functional interactions between tRNA and PTC could have been 'revised' in evolution.
A study found that small genetic variations impact an organism's ability to utilize energy from various nutrients. Researchers identified several genes contributing to sugar tolerance in fruit flies, which are also present in humans and linked to obesity and type 2 diabetes.
Researchers developed a computational technique to predict favorable gene sequences that make Rubisco, a key plant enzyme for photosynthesis. The study found promise for developing faster and more efficient Rubisco enzymes to increase crop yields and adapt to hot, dry future conditions.
A recent study on the Maniq population found they exhibit high levels of genetic differentiation, similar to other isolated populations. The researchers also discovered that the Maniq retain a unique hunter-gatherer lifestyle and Hòabìnhian-related ancestry, setting them apart from other Southeast Asian groups.
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.
A recent study by researchers from the University of Cambridge and Boston University has made a major breakthrough in understanding how cuckoo finches mimic eggs of multiple host species. The team found that female cuckoo finches inherit their egg-mimicry abilities from their mothers, allowing them to exploit different host species. Ho...
A recent study published in Genome Biology and Evolution found that ancient human remains from Bulgaria are more closely related to contemporary East Asians than Europeans. The researchers propose a scenario where an African population hub expanded into Europe and East Asia around 45,000 years ago, with the European representatives dec...
European populations evolved over 50,000 years, increasing height and intelligence, but also risking cardiovascular disease due to decreased 'good' HDL cholesterol. Researchers analyzed genetic changes to better understand the impact of the Neolithic revolution on human health.
A comprehensive study of 8,000 birds in Israel found significant changes in bird morphology over the past 70 years, likely due to global warming. Some species became lighter while others gained size, increasing their surface area-to-volume ratio to facilitate heat loss.
Biomedical engineers at Duke University have discovered a physical mechanism that causes high doses of antibiotics to promote the spread of antibiotic resistance between bacteria. The culprit is an overabundance of 'jumping genes,' called transposons, which carry genetic instructions for resistance from cell's source code to plasmids.
The study found that cryptochromes are conserved across various green organisms, influencing cell structures responsible for photosynthesis. The researchers discovered that a specific cryptochrome can actually lead to increased growth despite appearing darker green due to denser packed cell membranes.
Researchers found that mutation frequencies in mitochondrial DNA of developing egg cells are lower and increase less with age compared to non-reproductive cells. This suggests a protective mechanism may keep reproductive cells relatively stable, potentially related to human propensity to reproduce at later ages.
Jellyfish have evolved separate and independently complex eyes many times over millions of years, making them an ideal model to understand genetic expression. By analyzing multiple species and genes, researchers aim to uncover similarities and differences in evolutionary patterns.
Researchers discover medusavirus undergoes four stages of maturation within host cells, with unique particle structures and DNA-protein exchange mechanisms. The findings provide new insights into giant viruses' biology and behavior.
Research team at University of Münster finds that a specific gene variant allows fruit flies to synchronize their circadian rhythm with temperature cycles under constant light. This adaptation enables better mating opportunities and increases the allele's evolutionary success.
Researchers found that urbanization increases hydrogen cyanide production in white clover as a defense mechanism against herbivores. The study, published in Science, reveals adaptive evolution due to urbanization is driving global-scale changes in plant species.
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.
University of Ottawa scientists, collaborating with Yale researchers, have discovered the hidden influence of a single variation between histone H3.1 and H3.3 proteins. This finding could expand our understanding of DNA damage repair and its role in diseases like cancers and sponastrine dysplasia.
Researchers found that female Faeder variants produce fewer offspring, but this disadvantage helps their males, who benefit from their rarity and obtain more matings. The contrasting effect of the variant contributes to its persistence over time.
A study reveals that new bird species arise in lowland habitats before moving higher into mountainous areas, where genetic differences accumulate. The research suggests that climate fluctuations, particularly during the Pleistocene era, contributed to the evolution of these high-altitude populations.
A team of paleogeneticists successfully sequenced the genome of the extinct Christmas Island rat, but found that key genes related to olfaction were missing. The study reveals the challenges and limitations of de-extinction across all species, highlighting the need for a more nuanced approach.
A new mathematical framework has been created to study fitness landscapes of regulatory DNA, enabling the prediction of gene expression changes. The framework uses a neural network model trained on millions of experimental measurements to decipher the evolutionary past and future of non-coding sequences.
A team of student researchers from John Jay College of Criminal Justice has discovered at least three families of human microRNA genes not shared with any other primate species on chromosome 21. These genes may have played a significant role in the unique evolution of the human species.
Scientists create novel germplasm by introgressing B. rapa genome into B. juncea and demonstrate increased genetic diversity and phenotypic variation among the introgression lines. This strategy provides a new method to expand genetic variation in Brassica species.
A new molecular study of grasses reveals a clear picture of their evolutionary relationships, shedding light on the evolution of C4 photosynthesis involved in heat and drought tolerance. The research provides evidence that this type of photosynthesis evolved independently multiple times within different grass lineages.
Researchers from Tokyo Tech elucidated the molecular evolution of NRK, revealing a novel mechanism regulating placental development by modulating the CK2-PTEN-AKT pathway. The study showed that NRK underwent rapid molecular evolution to acquire its function in eutherian ancestors.
Researchers found that hundreds of bacteria genes were integrated into ancient plants, granting them desirable traits for land colonization. The study suggests horizontal gene transfer played a significant role in land-plant evolution, allowing plants to adapt rapidly to new environments.
Researchers analyzed 263 viper species to find significant correlations between horn types and habitats. Nasal horns are associated with terrestrial forest habitats, while ocular horns are linked to tree-dwelling or sparsely vegetated environments.
Research suggests that genetic material from E. coli bacteria in farm animals may contribute to the evolution of deadly pandemic strains. The study found that ColV plasmids in pigs, cattle, and chickens can increase the likelihood of antimicrobial resistance and extra-intestinal infections in humans.
Researchers from the University of Oxford's Big Data Institute have created a single genealogy tracing the ancestry of all humans, combining genome sequences from eight databases and 3,609 individual genomes. The study successfully recaptured key events in human evolutionary history, including migration out of Africa.
Research shows that asexual reproduction in stick insects, such as parthenogenesis, reduces genetic variability and slows down adaptation to environmental changes. This negatively impacts the speed of adaptation and genetic diversity in these insects.
A new study from the University of Georgia reveals that pollen begins expressing its own genome at a specific point in its life cycle. This discovery has significant implications for plant breeding, as it allows researchers to predict how plant species adapt to environmental changes and potentially speed up crop development.
The Colorado potato beetle has evolved rapid resistance to insecticides by leveraging its existing genetic diversity, allowing different populations to quickly adapt and overcome new chemicals. This wealth of diversity will likely make the pest difficult to control in the future.
Researchers analyzed expanded genetic markers to estimate evolutionary distance between Archaea and Bacteria, finding a long branch length that separates the two domains. The study suggests that conventional methods may underestimate true branch length and diversity of Archaea.
A COVID-19 genetic risk variant inherited from Neandertals reduces the risk of contracting HIV by 27%. This variant is associated with fewer CCR5 receptors, which can lower the risk of HIV infection.
A study published in Immunogenetics found that male Kentish Plovers have stronger immune systems than females due to the presence of two active copies of immune genes on their Z chromosome. This may explain why males tend to survive longer than females in this species.
Research by Shan Jiang found that introducing nature views into hospital corridors can significantly ease confusion and anger in navigating large medical complexes. The study revealed that participants used shorter time and walked less distance to complete wayfinding tasks when exposed to green spaces.
Researchers found that butterfly eyespots evolve from a pre-existing gene regulatory network used to build antennae, legs and wings. The study discovered specific genes and regulatory connections underlying the development of complex traits.
Researchers analyzed the largest genomic dataset of plants, revealing how early traits like stomata and roots evolved. The study sheds light on the genetic basis of plant evolution, highlighting the role of new and old genes in adapting to land colonization.
Researchers studied microorganisms, including TB bacteria, to understand how genetic mutations drive adaptation and resistance. They found that certain types of mutations are more common than others, and this imbalance can help scientists predict which mutations will lead to drug resistance.
Using ancient and historical DNA can assess population genetic patterns and inform conservation actions. The study reveals that a/hDNA can be compared with contemporary data to set baselines for intra-species genetic diversity and estimate changes in effective population size.
Researchers found that epigenetic inheritance can affect the genetic composition of a population for multiple generations. Exposure to high temperatures accelerated the rate of evolution, increasing the spread of genes through mating.
Researchers led by Charles Carter will investigate how critical molecules interacted and evolved together, leading to the emergence of life on Earth billions of years ago. They aim to characterize an ancestral alphabet and establish how it grew into the twenty-letter coding alphabet used in genes.
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.
Three University of Exeter researchers Dr Jasmine Ono, Dr Luis Yanez Guerra and Dr Jane Usher have been awarded BBSRC Discovery Fellowships for innovative research in biotechnology and biological sciences. They will focus on improving scientific knowledge to develop better treatments for human fungal pathogens and understanding the ori...
A new study found that pollutants can be transmitted over many generations in water fleas, persisting long enough to influence the evolutionary process. The effects of low doses of pollutants were detected even after switching to clean water, indicating stable epigenetic marks passed down through generations.