Articles tagged with Evolutionary Genetics
Researchers from Princeton University uncover the origins of the human-biting mosquito Culex pipiens molestus, dating it back over 1,000 years to ancient agricultural societies in Egypt. The study reveals genetic links between bird-biting and human-biting mosquitoes, crucial for understanding West Nile virus transmission.
A recent study analyzed 390 parent-offspring trios to identify gene mutations that occur in the sperm or ovum, leading to de novo mutations. The results show a clear correlation between parental age and the number of new mutations in puppies, with higher paternal age increasing the risk.
David Stern, a Senior Group Leader at Janelia Research Campus, joins Stowers Institute to uncover new avenues of biology with enormous implications. His lab discovered 'bicycle proteins' that trick plants into growing protective homes for aphids, shedding light on the battle between plants and insects.
A new research paper from Colorado State University finds that precipitation levels are the key environmental factor influencing genetic variation in the warbler's beak, which is crucial for heat retention. The study reveals that birds struggling to adapt to climate change experience higher stress levels and population declines.
Researchers at Stowers Institute for Medical Research have identified the precise location where human chromosomes break and recombine to form Robertsonian chromosomes. The study reveals that repetitive DNA sequences play a central role in genome organization and evolution, explaining how these rearrangements form and remain stable.
Researchers found genetic adaptations underlying survival in hot and dry environments, revealing how natural selection enabled the Turkana to thrive in extreme conditions. The study identified key genes, including STC1, that play vital roles in conserving water and protecting kidneys from waste.
Scientists have discovered how to potentially control harmful insect populations by studying a 'selfish gene' that manipulates inheritance. By understanding the molecular basis of this genetic mechanism, researchers believe they can identify novel methods to control certain insects that are globally significant pests and disease carriers.
A team of researchers found that a regulatory region of the genome, which controls the development of digits in mice and fish, was co-opted by evolution to guide digit formation. This discovery reveals a major evolutionary strategy of reusing existing genetic mechanisms.
Researchers found that brown anole lizards can withstand extreme lead levels without impairment. Transcriptomic analyses revealed minor effects on brain and liver tissue, with altered genes linked to metal ion regulation.
Researchers found that symbionts of reed beetles regulate gene expression according to the beetle's life stage, diet, and environmental conditions. The study shows that these bacteria can maintain a regulated metabolism with a minimal set of genes, suggesting a flexible and adaptable approach to support their hosts.
A study found that the red-headed wood pigeon's unique genetic history, shaped by centuries of gradual inbreeding, enabled its population to survive and rebound dramatically. The team's analysis revealed lower levels of highly deleterious mutations in the endangered species compared to the more widespread Japanese wood pigeon.
Researchers found that a single amino acid substitution in the ADSL enzyme affects its stability and expression, contributing to modern human differences in behavior. The study suggests that this change may have provided an evolutionary advantage in certain tasks.
The cichlid fish Perissodus microlepis has an unusual head shape due to bilateral symmetry breakdown, and its genome analysis reveals multiple genes contribute to this asymmetry. Behavioral experiences also influence the preferred direction of hunting behavior, reinforcing both genetic and morphological asymmetries.
The American Society of Human Genetics recognizes Dr. Harry Dietz for his work on Marfan Syndrome, Dr. Eric Green for his leadership in advancing human genetics and genomics, Dr. Mike Talkowski for his pioneering contributions to cytogenetics and genomic medicine, and Dr. Elizabeth Bhoj for her extensive work in translational genetics.
A large international team genetically maps glasswing butterflies across Central and South America, rewriting the evolutionary tree and highlighting six new species. This study provides answers to questions that have remained unknown for at least 150 years.
Scientists discovered that marine copepods rely on both genetic and epigenetic changes to survive climate change. Epigenetic changes, which are temporary chemical modifications, play a crucial role in helping these tiny crustaceans adapt to ocean acidification and warming conditions.
Researchers from University of Zurich and Basel decode historical specimen to understand how 1918-1920 influenza pandemic evolved in Europe. The Swiss genome reveals three key adaptations that made the virus more resistant to human immunity and more infectious.
A new study led by Brown University biologists found that different species of large herbivores have diets that are more diverse and complex than previously known. Researchers analyzed fecal and plant samples to identify the types of plants consumed by each species, revealing smaller dietary differences between species than expected.
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.
The Siberian flying squirrel's genetic diversity is lowest in Finland and highest in the Russian Far East, highlighting a need for taxonomic re-evaluation and conservation efforts. The species' western populations are facing population declines and habitat loss, compromising their capacity to adapt to environmental changes.
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.
Researchers have discovered two signaling molecules that can reprogram ant duties, mirroring gene-expression patterns found in eusocial naked mole-rats. These findings suggest a convergent molecular mechanism dating back hundreds of millions of years, hinting at the evolutionary depth of social behavior.
New research reveals evolutionary reversal in island plants where wild-growing tomatoes on western islands produce alkaloids similar to those found in eggplants. The study suggests that environmental conditions may be driving the reversal, and this phenomenon could have implications for human evolution and nature's ability to adapt.
A global study has uncovered greater diversity and flexibility in mosquito feeding patterns, challenging old ideas about how they choose their hosts. The research highlights the need for better tracking and prediction of mosquito-driven disease transmission in a changing climate.
A study comparing two species of transparent worms reveals that gene expression patterns tend to remain unchanged in basic cell types, while diverging more rapidly in specialized cells involved in sensing and responding to the environment. The findings provide new insights into the pace of evolution in organisms.
A recent study published in Proceedings of the Royal Society B discovered that sex-changing fish can rapidly assert dominance after a change in social hierarchy. In this species, known as the New Zealand spotty or paketi, dominant behavior emerges within minutes of removing the current dominant fish.
Research led by University of Wyoming scientists identifies a potential new subspecies of sharp-tailed grouse in south-central Wyoming. The population found in southern Carbon County and northwest Colorado is not Columbian or plains sharp-tailed grouse, but rather potentially a distinct subspecies isolated for years.
A team of researchers constructed a cross-species single-nucleus RNA-seq atlas of amniote brains, uncovering conserved and divergent cell-type evolution. Functional divergence or loss of paralogous genes significantly drove the evolution of brain cell types, with distinct expression patterns across species.
Scientists have discovered that leprosy, caused by bacteria Mycobacterium lepromatosis, has been infecting humans in the Americas for at least 1,000 years. The study analyzed DNA from ancient human remains and recent clinical cases, confirming that the disease was already widespread in North and South America before European colonization.
A recent study has discovered that cold-adapted species began evolving 2.6 million years ago, with many modern species emerging around 700,000 years ago. The research provides insights into the evolution of Arctic ecosystems and highlights the importance of understanding past adaptations to inform conservation efforts.
Researchers used yeast populations to measure evolutionary potential to adapt to future warming in real-time, highlighting species-specific responses. Different species employed distinct strategies to cope with heat, with some expanding temperature ranges and others reducing fitness.
The Universitat Autònoma de Barcelona is part of the international Tree of Sex project, aiming to create a comprehensive database on reproduction in eukaryotes. The UAB will contribute genomic, transcriptomic, and ecological data to expand upon the original initiative.
A new study found that mammals with bigger brains and more complex immune systems tend to live longer. The research suggests that the immune system plays a major role in driving the evolution of longer lifespans across mammals, removing aging and damaged cells, controlling infections, and preventing tumor formation.
A study found that bumblebees are twice as likely to visit yellow flowers compared to red ones, with increased scent emission being a key factor. However, the shape of the flowers presented problems for bees, hindering efficient pollen transfer.
Researchers have discovered that secretoglobins, a protein family thought to be exclusive to mammals, are also found in turtles, crocodilians, lizards, and birds. The study suggests that these proteins evolved earlier than dinosaurs and share a basic function not yet discovered.
Researchers at King Abdullah University of Science & Technology (KAUST) have discovered genes that can strengthen rice crops against environmental stresses such as heat, drought, and salinity. The study also identified a comprehensive framework for developing robust rice crops that can thrive in challenging environments.
A UNIGE team has identified a single gene, CLCN2, that determines the corn snake's diverse skin pattern diversity. The study found that variations in this gene lead to distinct coloration patterns, including red blotches and stripes.
Researchers have identified two proteins in birds that compensate for the loss of a key immune component in humans, providing insights into combating respiratory diseases. The study sheds light on how birds maintain lung protection despite their unique respiratory anatomy.
A study published in the Journal of Medical Entomology found a gene mutation in bed bugs that may contribute to their resistance to insecticides. The researchers, led by Warren Booth, discovered the mutation in 134 unique populations of bed bugs collected from North America between 2008-22.
A new study published in Science reveals insights into the activity of genes inside different cell types in maize plants. The research, led by Alexandre Marand at the University of Michigan, sheds light on how molecular biology connects to a plant's visible traits, such as ear size and growth.
The study reveals that eukaryogenesis occurred abruptly at a critical gene length of 1,500 nucleotides, marking the emergence of the eukaryotic cell. This phase transition was algorithmic, driven by the tension between increasing gene length and protein complexity.
The study provides a comprehensive reference for six ape species, including siamang, Sumatran orangutan, gorilla, bonobo, and chimpanzee. The ape genomes offer new insights into human and ape evolution, genetic differences among species, and potential therapeutic applications.
A new genomic study has uncovered long-lost genetic diversity in mammoth lineages spanning over a million years, shedding light on their evolutionary history. The findings demonstrate the power of ancient DNA in characterising past genetic diversity and advance our understanding of mammoth evolution.
The study reveals conserved neural patterning mechanisms in mammalian hypothalamus development, tracing how brain cells emerge from neural progenitors during growth. The researchers identified four adaptive evolutionary divergences in human neurons, including a unique subtype and enhanced neuromodulation.
A new study found that genetic predisposition to sedentary behavior is associated with a higher risk of developing the most common cardiovascular diseases. Individuals with the highest genetic predisposition accumulated more daily sedentary time and had a 20% higher risk of cardiovascular diseases.
A team of researchers found that a gene regulatory network in gut microbes plays an auxiliary role in bacterial fitness and adaptability. By maintaining basal levels of genetic activity, the network allows bacteria to adapt to their constantly changing environment.
A study from Michigan Medicine researchers reveals that X-carrying and Y-carrying sperm compete for binding to Spindlins, influencing gene expression and the sex ratio. The findings suggest that this competition is crucial for maintaining the optimal balance of female and male offspring in mice.
Researchers created a bacterial evolutionary map that tracks plasmid gene exchange and identifies barriers to treatment. The study reveals new insights into the co-evolution of plasmids and E. coli strains, paving the way for targeted therapies against antibiotic-resistant infections.
Researchers at UTA uncovered how the flowerpot snake repairs its DNA and prevents harmful mutations, shedding light on genetic repair mechanisms that could deepen our understanding of human gene evolution. The study also reveals surprising findings about reproductive strategies and immune-related genes in reptiles.
Researchers discovered that certain marine diatom species can thrive on a diet of seaweed and decaying plant matter due to the acquisition of a bacterial gene. This adaptation allowed them to break down alginate, a carbon polymer in seaweed cell walls, enabling the diatoms to survive without photosynthesis.
Researchers found that women have significantly more sensitive hearing than men, with an average difference of two decibels across all populations studied. Environmental factors such as living in forests or high altitudes also affect hearing sensitivity, with forest-dwellers having the highest and altitude residents having the lowest.
Researchers discovered that whole-genome duplication persists for thousands of generations due to its advantage in growing larger cells and forming bigger clusters, leading to the development of multicellularity. The study provides new insights into how genome duplication contributes to biological complexity.
A study of human-specific genes reveals their crucial role in brain development, providing new insights into the evolutionary origins of the human brain. The research highlights the importance of these genes in determining brain complexity and size.
A team from the University of Illinois found that traditional breeding methods are unlikely to improve soybean light-harvesting efficiency. Gene editing is likely needed to unlock soybean potential. The researchers gathered detailed measurements throughout an entire growing season to understand photoprotection relaxation in soybeans.
Researchers discovered that a drug-resistant type of bacteria has adapted to produce antimicrobial genetic tools, eliminating its cousins and replacing them as the dominant strain. The finding validates a system developed at Pitt and UPMC for detecting infectious disease outbreaks.
A new study reveals that Galapagos yellow warblers are changing their behavior in response to traffic noise, with those living near roads showing increased aggression. The birds adapt by adjusting the frequency of their songs to help them be heard above the noise.
Research suggests that flowering plants' tendency to reward pollinators with nectar is heritable and influenced by flower size and sugar content. Bees prefer honest flower genotypes, benefiting the plant through increased seed production.
Researchers found evidence of a genetic mixing event between two ancient populations around 1.5 million years ago, which contributed to the modern human species. The study suggests a more complex story of human evolution than previously thought, with different groups developing separately before reuniting.
Researchers have discovered a common gene linked to human kidney disease is also present in sea anemones, allowing their hair cells to detect water movement. This finding suggests an evolutionarily ancient role for the gene in sensing fluid movement, predating the common ancestor of mammals and sea anemones.