Articles tagged with Evolutionary Genetics
Researchers discovered that human saliva is more watery and contains distinct protein profiles compared to chimpanzees and gorillas. The differences are attributed to varying diets, with human saliva being effective at breaking down starch and fat.
Flipons are sequences that alter DNA conformation, enabling cells to dynamically modify gene expression. This adaptable coding allows cells to change their response to environmental stressors, such as oxidative stress, which promotes Z-DNA flipon formation.
The study reveals that repeated genomic regions expanded during human evolution and associate with differential gene expression in human and chimpanzee brain cell types. Expanded tandem repeats may hold clues to mechanisms driving their expansion and potential roles in human development.
Researchers created the most comprehensive evolutionary tree for green plants using genetic data from 1,147 species. The study found that the transition from aquatic to terrestrial plants was a key event in driving genetic diversity and plant evolution.
Researchers at NYU discovered that a single amino acid change in E. coli's EmrE transporter protein dramatically alters its structure and function, reducing bacteria's resistance to drugs. This finding may have implications for combating antibiotic resistance and drug development.
A comprehensive review of plant reproductive systems provides new perspectives on heterostyly, highlighting recent advances and unresolved questions. The study explores the ecology, evolution, genetics, and genomics of plant reproductive strategies, shedding light on their role in ecological interactions and evolutionary change.
A new meta-analysis found that fabella prevalence varies by region (Asia > Africa), age (older individuals more likely) and sex (men more likely). Fabellae can ossify in people of almost any age, from children to adults over 70.
Three moth species, including the peppered moth, rely on the same gene for industrial melanism, a response to environmental change. The mutations likely occurred hundreds of years before the industrial revolution, suggesting adaptive evolution uses similar genetic machinery across deep evolutionary time.
Researchers propose a cascade of chemical reactions to produce RNA's four genetic building blocks, creating a pivotal step in chemical evolution. The process requires simple precursor molecules and can occur under homogeneous environmental conditions.
A new phylogenomic tree reveals the early evolution of stick insects was likely triggered by birds and mammals. The study suggests that their remarkable camouflage abilities evolved as an adaptation to avoid predators, with most old lineages emerging after the dinosaurs became extinct 66 million years ago.
The study presents the first genome sequence of the Florida panther, revealing increased genetic variation in the population. Genetic rescue efforts led to a tripling of genetic diversity in two offspring, alleviating genetic defect threats and promoting population growth from 20-30 to 120-230 individuals.
Researchers at Stanford University identified 25 convergent amino acid changes in 18 genes involved in the development of the cochlear ganglion, a key component in echolocation. This discovery resolves a long-standing debate on whether echolocating bats and whales independently evolved similar genomic changes.
New research finds that climate change may exacerbate species conflicts, driving extinctions, and highlights the importance of landscape connectivity. High movement rates can reduce conflict, emphasizing the need for well-connected landscapes.
Researchers found that natural selection acts on signal-sensing receptors, influencing a worm's decision to stay or enter dauer based on the availability of resources. The study provides evidence that artificial and natural selection work similarly, supporting Darwin's hypothesis.
Researchers argue that viewing past human populations as discrete branches on an evolutionary tree is misleading and instead propose a dynamic changes in connectivity model, which better explains genetic diversity and fossil records. This shift in understanding could address complex questions in human evolutionary studies.
Scientists mixed RNA and DNA to study how life began on Earth, finding unstable chimeras that can replicate RNA and DNA. The research suggests a more complex system may have existed before pure RNA and DNA, supporting alternative theories of life's origins.
Researchers found elevated selection and increased mutational burdens in wild emmer wheat under global warming, but also more beneficial mutations. Genetic responses vary by temperature and rainfall, with high temperatures associated with lower mutational burden and reduced selection.
Researchers extracted genetic info from a 1.77 million-year-old rhino tooth, revealing an almost complete set of proteins and expanding the possibilities of retrieving reliable genetic information from mammal fossils. This breakthrough could solve long-standing mysteries of ancient animal and human biology.
Researchers have extracted almost complete sets of proteins from ancient dental enamel, allowing scientists to reconstruct molecular evolution beyond the usual DNA preservation limit. This breakthrough enables scientists to study hundreds of species, including humans, and could revolutionize our understanding of the world's evolution.
Researchers investigate Mediator complex's function in transcription, shedding light on its conserved role across evolution. The study reveals the complex's involvement in developmental regulation and provides insights into gene expression.
Researchers have discovered that house flies from different regions exhibit minor genetic differences in their Y chromosomes, yet display distinct sex determination mechanisms. The study suggests that natural selection may be responsible for maintaining these variations despite the apparent lack of significant genetic changes.
Bacteria can swap DNA through mechanisms similar to sexual selection in animals, and this genetic mixing may have benefits for cell survival and evolution. Researchers suggest that bacterial transformation, a process where cells release and take up DNA, could be governed by sexual selection.
Researchers at the University of Cincinnati discovered that six out of eight extinct Galapagos finch populations had higher genetic diversity than their surviving counterparts. This finding suggests that genetic diversity may not be a reliable predictor of extinction risk for mobile species like finches.
A single DNA variant affects the timing of sensory organ development in fruit flies, explaining size trade-offs between eyes and antennae. The study found a conserved genetic mechanism that could apply to sensory organ size variations across animal kingdoms.
Researchers used gene sequencing to discover new species, casting doubt on previously recognized species. The study aims to rewrite the horseshoe bat family tree, with implications for conservation and disease prevention.
Researchers used fruit flies to study the emergence of new genes in the testes, finding 184 de novo genes that originate from scratch. These genes show complex patterns and are most active during the spermatocyte phase of sperm development, suggesting they play roles in maturing sperm cells.
Researchers found a link between microRNA regulation and the rapid evolution of new species in Nicaraguan crater lakes. They analyzed five species of Midas cichlids and identified specific pairs of microRNAs and genes that interact with each other.
The study analyzed DNA sequencing data from over 3,500 human microbiome samples, revealing nearly 46 million bacterial genes. More than half of these genes were unique to each individual, performing specialized functions and suggesting a key role in microbial evolution.
The study found that ERK was easily switched on in ancient one-celled creatures but carefully restrained as animals evolved. Researchers identified two key changes that likely brought ERK under more control across evolution.
Researchers at the University of California San Diego have developed a groundbreaking system for determining gene expression based on machine learning. The new method leverages chromatin biology and molecular features to identify expressible genes with high accuracy, providing a genetic 'Rosetta Stone' for biologists.
Researchers at the University of Bristol discovered the secrets of shoot evolution, revealing a switch that enabled plants to delay reproduction and grow shoots, leaves, and buds around 450 million years ago. This finding has significant implications for understanding plant shape regulation and could inform efforts to engineer crops.
Decades-old frozen fish reveal roots of rapid evolutionary adaptation to human-induced environmental change. Genomic analysis shows that multiple genetic pathways can lead to similar traits, supporting the idea of diverse evolutionary paths.
A new study explores genetic roots of 26 populations from diverse regions and cultures of western South America and Mexico, revealing long-distance connections between speakers of the same language. Genetic analysis also found a distinct ancestry component in Amazonia present at high frequency in populations from Ecuador and Colombia.
A recent study has found that intense fish harvesting can cause rapid evolutionary changes, including changes in growth rates and maturity. The research, published in Science, used genomic data to analyze the effects of fishing on Atlantic silverside populations.
A new study reveals that circular Rep-encoding single-stranded DNA viruses have acquired their genetic components through complex evolutionary processes. The findings show that these viruses are 'obsessive borrowers', appropriating genetic material from various sources, including bacterial and eukaryotic cells.
Scientists studied how garfish regrow fins and found genes and mechanisms responsible for this process. These findings suggest that the last common ancestor of fish and tetrapods had a specialized response for appendage regeneration.
Researchers found that cryptic genetic variation enables bacteria to evolve green fluorescent proteins with increased diversity. The discovery could improve directed evolution techniques for developing new biomolecules for medical and other applications.
Researchers at the University of Cologne have found that somatic niche cells surrounding primordial germ cells (PGCs) control their response to DNA damage. This discovery sheds new light on how PGCs maintain genome integrity, potentially improving understanding of inheritance and infertility.
The August edition of SLAS Technology features a review on technologies for the directed evolution of cell therapies, which are moving beyond small molecules and proteins to using whole cells. Researchers can utilize emerging tools like image-activated cell sorters to accelerate high-throughput automation technologies.
Climate change and elevated CO2 levels contribute to the evolution of weeds, including increased competitive abilities and herbicide resistance. Research found that drought and elevated CO2 cause genetic and phenotypic changes in individual weed populations.
A recent study published in Weed Science has made significant progress in understanding the genetic basis of sex determination in Palmer amaranth and waterhemp. The researchers were able to distinguish between male and female plants with a high degree of accuracy, paving the way for new control strategies.
Researchers examine the potential and uncertainties of genetic rescue, a conservation approach that aims to alleviate genetic problems in isolated populations. The study highlights the need for further research on the effectiveness and limitations of genetic rescue, including its impact on habitat fragmentation and biodiversity.
Researchers analyzed DNA from Gibraltar Neanderthal remains found in 1848 and 1926, finding that some sequences were deaminated due to damage, while others showed significant human DNA contamination. The study suggests it is possible to analyze ancient DNA in highly contaminated specimens using a specific preparation method.
A recent study published in Current Biology has challenged the long-held idea that Hox genes are the primary drivers of body plan evolution. Researchers found that modifications to a Hox gene were only part of the story, with other genes playing crucial roles in shaping animal development.
Research reveals scorpionfly species are not separate, but have evolved different forms to adapt to altitude and climate. The study uses Bayesian simulations and phylogenetic analyses to estimate divergence time of Japanese scorpionfly lineages.
Researchers create a genetic map of three vegetables, revealing new insights into their origins and potential for improvement. By tracing the evolutionary history of canola, rutabaga, and Siberian kale, scientists identify genes that could lead to more nutritious and resilient crops.
A recent study published in Evolution Letters found that a single old-growth tree can have up to 100,000 genetic differences between its base and tip. This suggests that these massive trees are capable of accumulating significant genetic variation over time.
Researchers developed a new technique called VEGAS, which enables rapid development of scientific tools and new treatments for diseases in mammalian cells. The method can yield useful new molecules within days, providing scientists with a powerful research tool.
Researchers discovered that multiple antibiotic resistance mutations in E. coli acquired simultaneously, rather than through gradual evolution. This finding suggests a recent emergence of the pandemic multidrug-resistant strain, possibly within the last 12 years.
A large-scale study reveals fundamental gene activity networks controlling organ development in mammals, with original patterns dating back over 200 million years. The researchers also identified a surprising number of RNA genes involved in organ development.
Researchers found genetic divergence between ice worm populations north and west of the Coast Mountains of British Columbia and those south and east. Birds are believed to have transported eggs between glaciers, introducing new diversity to isolated ice worms.
The Ruminant Genome Project has provided unprecedented insights into the genomics, evolution and adaptation of ruminants, a group with significant importance in agriculture, conservation and biomedical fields. The study revealed large declines in ruminant populations nearly 100,000 years ago, coinciding with human migration out of Africa.
A study published in Behavioural Processes found that wolf spider's display of courtship behavior can make them an easy target for birds. Females prioritize males with symmetrical tufts on their forelegs and robust leg fur, which indicate overall health and immune competence.
A team of scientists collected non-invasive samples from lynx in Turkey, revealing unexpectedly high genetic diversity and low inbreeding rates. Females stay within their birth territories while males disperse after separation from mothers.
A new study investigates the use of multiple fungal biopesticides to prevent uniform evolutionary response and promote sustainable control. The project aims to make agricultural landscapes more diverse, allowing for longer-term use of biopesticides without consistent resistance evolution.
Researchers discovered that behavioral traits are highly heritable, explaining differences between breeds. The study analyzed data from over 6,000 cats representing three breeds: Maine Coon, Ragdoll, and Turkish Van.
A study has identified new potential genetic causes of male infertility, which will help develop better diagnostic tests. Researchers found de novo mutations in genes involved in spermatogenesis, none of which were previously known to cause human infertility.
A team of researchers discovered that Antarctic fishes evolved genetic changes long before the continent cooled, mirroring human bone diseases like osteoporosis. This finding highlights that some adaptations used by fishes are similar to disease states in humans.
Researchers from McMaster University and the University of Montpellier have reached almost identical results in two separate studies, overturning a longstanding consensus on sloth evolutionary relationships. The combined molecular evidence suggests that ancient sloths may have been at home on both land and in trees.
Researchers discovered that the highveld mole-rat is impervious to AITC due to altered ion channels, particularly the constitutively open channel NALCN. This change allows the highveld mole-rat to coexist with venomous ants.