Articles tagged with Evolutionary Genetics
Scientists sequenced genomes of 2,092 Africans to uncover genetic basis of skin pigmentation, finding a light pigmentation variant introduced by gene flow from non-Africans. The study also identified the MFSD12 region as crucial for melanogenesis, a process in which skin produces pigment.
A global assessment reveals that genetically engineered crops producing insect-killing proteins from Bacillus thuringiensis have led to a fivefold increase in pest resistance cases over the past decade. However, some pests remain suppressed due to factors such as recessive inheritance of resistance and abundant refuges.
A recent genetic study found that men's ability to father children later in life has no link to their longevity, and women's survival past 50 is not favoured by evolution. The research suggests that genes beneficial for both early and late life are the key to understanding why people live beyond 50.
Researchers identified a single genetic change, S139N, that enabled the Zika virus to cause microcephaly in mouse models of fetal infection. This mutation made the virus more lethal to human neuron precursor cells and substantially more severe in cases of microcephaly.
A study published in PLOS Genetics found that lethal genetic disorders are more common than expected due to factors such as balancing selection, disease severity, and errors in estimates. This research may help identify overlooked mutations causing these disorders.
Asteroid impact led to rapid genetic evolution in surviving birds, potentially influencing modern bird diversity. Human activities may accelerate similar 'Lilliput Effect', impacting evolution across species.
Scientists discover cryptic species in Elymnias genus due to mimicry, not interbreeding. Multiple species on different islands evolved to resemble a single model species, confounding classification.
Researchers aim to identify parasite genes underlying resistance, monitor spread, and design treatment strategies. They will use innovative genetic crosses in a 'humanized' mouse strain to better understand drug resistance evolution.
Researchers used CRISPR to study the WntA gene's role in butterfly wing patterns. The results showed how this gene has orchestrated the evolution of diverse wing patterns across multiple species. This discovery sheds light on biodiversity and could have implications for understanding human anatomy.
Researchers have identified genes promoting health and fitness in young worms but driving aging later in life. This discovery may have implications for treating neurodegenerative disorders like Alzheimer's and Parkinson's diseases.
A large-scale genetic study of Papuan New Guinean people found strong genetic differences between groups, reflecting linguistic and cultural diversity. The study suggests that the country's isolated highlands region has remained genetically independent for thousands of years.
Researchers discovered over 800 alternative ways evolution could have led to the protein's new function, highlighting chance mutations' role. The study reveals how idiosyncratic evolution unfolded, with many possible mutations occurring before reaching the historical solution.
Researchers found that stingless bees control worker reproduction through pheromones, allowing workers to care for the queen's offspring instead of their own. This adaptation creates a conflict between the queen and workers over reproductive interests.
New study highlights challenges in predicting evolutionary fate of new traits, citing factors such as environmental change, social life of alleles, and genetic interactions. This complexity can lead to the emergence of drug resistance and disease outbreaks, emphasizing the need for improved predictive models.
Researchers analyzed the genomes of 210,000 people to find a drop in some genetic mutations linked to Alzheimer's disease and heavy smoking in those who lived longer. Additionally, sets of mutations predisposing people to heart disease and obesity appeared less often in longer-lived individuals.
A team of researchers has discovered a network of genes and genetic regulatory elements in the lining of the intestines that remains remarkably consistent across 420 million years of evolution. This conserved genetic signature is linked to various human diseases, including inflammatory bowel diseases, diabetes, and obesity.
Researchers found that urbanization led to significant epigenetic differences in Darwin's finches, which may be a heritable component of adaptation. The study suggests that diet and methylation patterns played a key role in the rapid adaptation of these species to changing environments.
A recent study by Georgia Institute of Technology reveals that genetic risks to health, such as cardiovascular disease, may be rising in modern humans. This contradicts the long-term trend of decreased genetic risk found in ancient ancestors.
A study found a dramatic genetic rift between bat populations on either side of the Northwest and Northeast Providence Channels in the Bahamas. The researchers suggest that bats from Florida colonized the northern islands while those from other parts of the Caribbean likely colonized the southern Bahamas.
Researchers sequenced and compared apple genomes to reveal a two-way journey for domesticated apples along the Silk Road. The study pinpointed the origin of domesticated apples in Kazakhstan and discovered that they hybridized with local wild apples, yielding modern dessert apples.
Researchers used a portable DNA sequencer to track the movement of the Zika virus, understanding its evolution and predicting future outbreaks. The study analyzed 254 whole genomes of the pathogen, revealing that Zika circulated silently in all regions of the Americas at least a year before the first confirmed cases.
A new study by Florida State University researcher David Houle found that small mutations in fruit flies can predict up to 40 million years of evolution for this common household pest. The research suggests a tight relationship between mutation effects and evolutionary changes.
Researchers at the University of Chicago have created a new classification system for common diseases based on genetic and environmental correlations. The study analyzed health insurance claims data from nearly half a million people and found surprising relationships among diseases such as migraine and irritable bowel syndrome.
Researchers at Penn State have received a grant to develop the first new taxonomy for species of the genus Fusarium in 30 years, aiming to improve identification and classification of the genus. The project will produce a comprehensive monograph with digital connectivity and access to DNA sequence data.
Researchers at the California Academy of Sciences used genetic information gathered from their vast mammal collection to elevate a subspecies of giant sengi to full species status. The team discovered that a white-tailed subspecies was genetically distinct enough to be recognized as a separate species.
A new study reconstructs the evolution of flowers and sheds light on what the earliest flowers might have looked like. The ancestral flower was bisexual, with both female and male parts, and multiple whorls of petal-like organs. This new model offers a plausible scenario to explain the spectacular diversity of floral forms.
Scientists use nonlinear reaction-diffusion equations to model gene movement and develop 'switches' that initiate and terminate gene drives, balancing genetic traits with embedded weaknesses. They also find that intense release in specific regions can trigger spreading, but can be stopped by barriers like pesticides.
Researchers at the University of Zurich discovered that malaria was already widespread on Sardinia in the Roman period, contradicting previous assumptions. Genetic adaptations, such as thalassemias, played a crucial role in protecting against malaria, with some individuals leading healthy lives while being immune to infections.
Researchers found that mutations giving rise to resistant genetic sequences formed frequently in fruit flies, hindering the efficiency of gene drives. This development may necessitate new approaches to overcome resistance in genetically diverse populations, making gene drive technology less reliable.
Research suggests that cognitive abilities in grandmothers may have contributed to the emergence and evolution of menopause. Computer simulations found that caring for existing children and grandchildren provided an evolutionary advantage, increasing fertility and survival rates.
A new study reveals that domesticated dogs and humans share a common genetic basis for social behavior, with unique genetic insertions associated with human-directed social behaviors in dogs. This finding challenges the conventional view of dog domestication and highlights the evolutionary conservation of sociability across species.
Researchers found that hairless dogs lack specific lingual cusps on their molars and premolars due to FOXI3 gene variation. The study suggests the gene may also play a role in human tooth morphology.
Researchers used 3-D genetic sequencing data to study the evolution of wheat from wild tetraploid wheat (Triticum turgidum) to domesticated wheat. They found two gene clusters that lost their function, leading to changes in spike morphology and grain development.
A new study reveals that a mass extinction 66 million years ago sparked an explosion of new frog species on different continents. The research, compiled by scientists from the University of Texas at Austin and other institutions, provides the most accurate frog family tree to date.
Kyle O'Connell, a fifth-year Ph.D. student at UTA, received a $19,695 NSF Doctoral Dissertation Improvement Grants award to support his research on speciation in Sumatra using parachuting frogs. His project aims to test hypotheses about the formation of new species through genetic and genomic data analysis.
A new study has found that the mass extinction event that wiped out dinosaurs simultaneously led to the evolution of three major lineages of modern frogs, which make up about 88% of living species. This finding suggests that the survivors filled up new ecological niches after the extinction event, resulting in the rapid diversification...
A single genetic change linked to reduced human height is also associated with an increased risk of osteoarthritis. The variant has been positively selected in many human populations, suggesting it may have provided a survival advantage in colder climates.
A study by Harvard University found a genetic 'switch' that controls the activity of a key skeletal gene related to height, which is also linked to an increased risk of osteoarthritis. The variant, more prevalent in Eurasian populations, favors shortness and is associated with lower GDF5 activity in growth plates.
Researchers at Arizona State University have developed a new approach to convert biomass into renewable biofuels and chemicals, using the trial-and-error power of evolution. By harnessing this power, they were able to coax bacteria to better ferment sugars derived from biomass, leading to a 50% increase in product yield.
Researchers have found that genes for coronary heart disease (CAD) also influence reproduction, suggesting a trade-off between heart disease and fertility. The study, published in PLOS Genetics, reveals CAD genes have been positively selected for through evolution, improving human reproduction.
Scientists study Burmese pythons' ability to regenerate organs after feeding, identifying key genes that drive regenerative growth. The team also explores the genetic basis of evolution in snakes and lizards, shedding light on the mechanisms behind unique traits such as venom composition and reproductive differences.
Researchers found that Himalayan species arose earlier in southern Tibet and then migrated to the region after mountain formation. The discovery challenges current biogeographical opinions and highlights the importance of molecular-genetic methods in testing old hypotheses.
A new large-scale study found that species with faster genetic differentiation rates produce more species over time. The study analyzed genetic sequences from 17,000 individuals across 173 bird species, demonstrating a link between population differentiation and speciation rates.
A study found that birds living in prime conditions have lower evolutionary potential to cope with climate change, whereas those between extremes exhibit greater adaptability. This reduces the likelihood of survival for populations in optimal and harsh environments.
A new study by researchers at Uppsala University reveals that genetic differences between species are the key to song discrimination in juvenile songbirds. The study finds that even when exposed to songs from other species, young birds selectively learn and discriminate their own species' songs.
Research reveals that nutritional factors significantly impact genetic variation and mutation patterns in bacteria, leading to distinct evolutionary paths. Environmental stresses like starvation for essential elements determine the availability of mutations, influencing the emergence of traits dependent on specific mutations.
A team of researchers from the University of Idaho challenges a 2016 study that suggested eastern and red wolves are not distinct species but rather recent hybrids. The new review argues that the data do not definitively prove recent hybridization, instead supporting the genetic and evolutionary distinctiveness of red and eastern wolves.
A recent genetic study has challenged long-held assumptions about the relationship between extinct and living elephant species. The research found that a species of giant elephant, Palaeoloxodon antiquus, is more closely related to African forest elephants than previously thought.
Researchers have identified energy metabolism adaptations in soft-shelled turtles that enabled them to lose their hard shells and explore aquatic environments. These adaptations were found in mitochondrial DNA-encoded proteins associated with aerobic respiration and are linked to the evolution of soft-shells in three turtle lineages.
Researchers discovered genetic changes in the Galapagos cormorant that led to its loss of flight and also contribute to human bone development disorders. The study provides insights into the evolution of limb size and may lead to new treatments for people with skeletal ciliopathies.
Researchers have identified key genes that control epigenetic modifications in wild and domesticated cotton, opening the door to new breeding techniques. By targeting these genes, breeders may be able to create crops with improved traits such as increased fiber yield and drought resistance.
Biologists analyzed genetic sequences from 17,000 individuals in 173 bird species, finding a positive correlation between population differentiation rates and speciation rates. The study supports the long-held assumption that genetic differences between populations predict species diversity.
Researchers develop synthetic genes that function like NOR gates in electronics, allowing for large-scale digital information processing in living cells. This enables targeted therapies and efficient biofuel production.
A new study has found that the Zika virus circulated undetected for up to a year in some regions before public health authorities took notice. The research, published in Nature, reconstructed the virus's dispersal by sequencing genetic material from hundreds of patients in ten countries and territories.
Researchers at the University of Illinois found that populations of E. coli evolved in two divergent paths, either improving swimming speed or growth rate, but not both, due to trade-offs. This study sheds light on how evolution proceeds when performance depends on multiple traits restricted by a trade-off.
Researchers discovered a new gene, Mdmd, which determines male sex in houseflies. The gene is relatively large and similar to CWC22, and its loss leads to 'pregnant' males with mature eggs. This finding demonstrates the evolution of sex determination and has implications for developing sustainable pest control strategies.
A large controlled trial found that teaching genetics first significantly improved students' test scores on evolution, especially for foundation classes. The study suggests that priming students with genetics information before teaching evolution can lead to better understanding of this complex concept.
The sunflower genome sequence provides insights into oil metabolism, flowering time, and Asterid evolution. The research identifies new candidate genes and reconstructs genetic networks controlling these traits.
A recent $540,000 NASA grant will fund a team of researchers at Portland State University to study the nature of a hybrid virus discovered by Ken Stedman in a hot spring. The study aims to shed light on the evolutionary history of viruses and their ability to adapt and infect hosts.
Researchers found that Heliconius erato butterflies possess unique visual photoreceptors based on species sex, with females containing two types of ultraviolet opsin genes and males lacking one. This study sheds light on the evolution of eye structure in response to environmental pressures.