Articles tagged with Evolutionary Genetics
Researchers at Uppsala University have discovered a genetic mechanism underlying the evolution of fibromelanosis in black chickens. The study highlights the role of genomic rearrangements in driving rapid evolution in domestic animals.
A complex genomic rearrangement causes a massive expansion of pigment cells in chickens, resulting in black skin and organs. Genetic studies in domestic animals have shed light on the process of evolution, with genomic rearrangements playing a significant role.
Researchers found that changes in one part of the skull were linked to changes throughout, challenging the idea of independent evolutionary events. The study used genealogical data and simulated shifts in skull shape associated with human evolution milestones.
A PhD student in ecology and evolutionary biology is tracking how viruses spread from flying foxes to humans. Her research aims to fill gaps in bat population data using samples from museum specimens.
Researchers found that hatcheries rapidly select for fish with exceptional survival and adaptation abilities, at the cost of their reproductive success in the wild. This study confirms 'domestication selection' as a primary driver of genetic changes in hatchery-born salmon.
Scientists at UCL have discovered three new gene regions on chromosome 16 associated with Crohn's Disease, which could lead to personalized treatment and improved understanding of its inheritance. The study used a novel gene mapping approach to analyze genetic information from 1698 patients, replicating results using independent US data.
A team of international researchers has developed an algorithm to infer the internal interactions of proteins and generate their atomic details from sequence information alone. This method could revolutionize the understanding of protein shapes and their functions, leading to breakthroughs in biology and medicine.
A team of Penn researchers has discovered that the evolution of the TAS2R38 gene, responsible for bitter taste perception, was driven by factors other than taste. The study found that African populations have a broader range of PTC taste sensitivity and unique genetic variants not seen in non-Africans.
New research reveals that climate change is causing certain species to adapt to new habitats, helping them track ongoing warming. The Brown Argus butterfly has successfully expanded its distribution northwards in the UK, using a range of distinct habitats.
A genetic factor regulating sleep duration has been identified in a study of over 4,000 participants. The ABCC9 gene variant affects sleep duration and is associated with metabolic syndrome symptoms. The discovery may explain the underlying mechanisms linking sleep to metabolic health.
A recent genetic study confirms that the wolf ancestors of modern dogs came from southern East Asia, contradicting theories placing their origins in the Middle East. The research, led by Dr. Peter Savolainen, analyzed Y-chromosomal DNA and found strong evidence supporting an Asian origin for dog domestication.
Researchers at EPFL and University of Geneva uncover a genetic mechanism that modulates gene activity through seven enhancers, leading to diversity in finger shapes. This discovery could help understand hereditary malformations and evolutionary variations in the animal kingdom.
Researchers at Max Planck Institute found that certain mutations can be maintained in populations if they have a heterozygote disadvantage, reducing their spread. This could help achieve safer release of genetically modified animals, such as mosquitoes resistant to malaria.
A new model explains the emergence of complex insect societies by positing that workers' selfish interests drive colony formation. This hypothesis suggests that at the early stages of social evolution, workers and queens act primarily in their own self-interest, rather than altruistically helping relatives.
Researchers used magnetic resonance imaging data from 406 adult human twins to confirm the long-standing idea that human cortical regionalization is similar to and consistent with patterns found in other mammals. The study found genetic influences on brain development progress along an anterior-to-posterior scale, with differences base...
New research reveals that columbines achieved a rapid radiation of 70 species through a simple change in cell shape, not cell proliferation. The extent of cell elongation drives diverse spur lengths across species.
Researchers sequenced bacterial genomes to understand how a pathogen evolves in response to human defenses and medical treatment. The study found widespread purifying selection, but also identified specific genes that showed strong evidence of positive selection.
Scientists have pieced together the most comprehensive phylogeny for mollusks, revealing surprising relationships between enigmatic groups. The study places Monoplacophora, thought extinct, as a sister clade to cephalopods, and establishes a single origin for shelled mollusks.
Researchers have determined the evolutionary family tree for the Hawaiian honeycreeper bird family, revealing they evolved from Eurasian rosefinches. The study used genetic data from 28 bird species to identify the ancestors of the 19 remaining species, which are facing significant extinction threats.
Francisco J. Ayala, a renowned evolutionary geneticist and UC Irvine professor, has donated $10 million to the School of Biological Sciences, the largest gift ever made by a UCI faculty member. The donation will fund four new research chairs in his name and support the department's efforts to recruit top talent.
A new study finds that young human-specific genes are correlated with the development of advanced brain structures, such as the neocortex and prefrontal cortex. The genes are most often expressed during fetal or infant development, indicating an early role in shaping the complexity of the human brain.
A new study published in BMC Evolutionary Biology reveals that deep-reef coral species have adapted to low-light conditions by increasing their nutrient and plankton exploitation capacity. This physiological strategy allows them to outperform shallow corals in growth rate and abundance.
Researchers studied lungfish to understand pelvic fin muscle development and its connection to the emergence of hind legs. The team found a transitional mechanism in bony fish that paved the way for tetrapod physiology, highlighting the importance of understanding evolutionary pathways in land adaptation.
Perennial crops retain significant genetic variation, closer to their wild counterparts than annuals. Long-lived species have fewer sexual cycles due to clonal propagation, resulting in lower genetic change.
Scientists discovered that Denisova hominins interbred with modern humans at least 44,000 years ago, contributing genetic material to populations in Southeast Asia and Oceania. The study suggests that there were at least two migration waves, contradicting previous assumptions about human settlement in the region.
A study published in Nature Genetics reveals that genetic parasites invaded the mammalian genome over 100 million years ago and transformed reproductive biology. This led to the development of the placenta, which nurtures young within the womb.
Scientists have pinpointed a key genetic change that enabled the domestication of corn from its wild relative teosinte. A jumping gene insertion about 23,000 years ago increased the expression of a gene affecting plant architecture, leading to larger ears with more kernels.
In a study published in Science, researchers found that female promiscuity can increase genetic benefits in inbred populations. Females who mate with multiple males produce more viable offspring, while those who only mate with one male experience reduced reproductive success.
A recent DNA study suggests that humans settled in Asia in multiple waves of migration, contrary to previous genetic studies. The research found that Denisovans, an archaic human group, contributed DNA to modern populations in Southeast Asia and Oceania, including New Guineans, Australian aborigines, and Philippine populations.
Researchers found genetic evidence that links fluid balance to a turning point in evolution, with the emergence of ENaC and Na-K-ATPase coinciding with multi-cellular organisms. The study suggests a link between these genes and the development of complex life forms.
Scientists discovered that epigenetic modifications in plants, such as DNA methylation, are unstable and often disappear after a few generations. These changes can occur frequently but usually do not contribute significantly to long-term evolution.
A study using genetic analysis found that technology spread more slowly in the Americas than Eurasia, with continental orientation playing a key role. The slow diffusion of crops and technologies in the Americas can be attributed to lower latitudinal gene flow between populations.
Scientists sequenced genomes of 17 common lab mouse strains to advance genetic studies of human diseases. The study revealed striking variations in strain relationships across the genome, highlighting the importance of genomic information for comparing species.
The study of 17 mouse strains reveals a range of genetic variation, with over 700 biological traits affected by mutations. The findings advance understanding of human disease and evolution, providing a critical resource for researchers.
Researchers at Michigan State University found that organisms quickly evolve ways to compensate for genetic and genomic disruptions in sex determination. The study used an experimental evolution approach to study adaptations in nematodes and showed that the mechanisms themselves are flexible and adaptable from an evolutionary viewpoint.
Researchers discovered genetic material from extinct archaic humans, including Denisovans, contributing to present-day African populations. The study suggests that contemporary Africans contain about 2 percent of archaic DNA, which may hold beneficial genes for human physiology and disease resistance.
Scientists identify genetic differences between mild and deadly Plague bacteria, revealing the role of small non-coding RNAs in disease severity. The study provides new insights into the evolution of pathogens and potential therapeutic targets for deadly diseases like the Plague.
The study reveals a spectacular degree of evolutionary divergence in the satyrine butterfly genus Calisto, with 34 species and 17 subspecies identified. This radiation is believed to have occurred over a period of 4-8 million years, driven by ancient dispersal events rather than plate tectonics.
A well-preserved fossil of a shrew-like mammal discovered in northeast China provides new information about the earliest ancestors of placental mammals. The discovery, dated to 160 million years ago, fills an important gap in the fossil record and helps to calibrate modern DNA-based methods of dating evolution.
Researchers analyzed molecular markers in three Italian pine vole species, revealing 'hidden' chromosome variations that distinguish them from one another. These findings provide insights into the evolution of this rodent group and may improve their taxonomy.
Researchers found that evolutionary changes in aphid populations led to rapid increases in population numbers, up to 42% faster than non-evolving populations. This rapid evolution has important implications for predicting pest densities and outbreaks in various applied areas.
A study by Rice University biologist Evan Siemann and colleagues found that the invasive Chinese tallow tree was not introduced to the US by Ben Franklin. The genetic evidence suggests that the trees originated from eastern China, with a faster growth rate in the US than their Chinese counterparts.
An international team of scientists used single molecule, real-time DNA sequencing technology to analyze the pathogenicity and evolutionary origins of the highly virulent German E. coli outbreak strain. The results provide the most detailed genetic profile to date, highlighting the importance of DNA sequencing in understanding how bact...
A new gene, Eibi1, has been discovered that plays a crucial role in the evolution of life on Earth. The gene contributes to the production of cutin, a component of plant cuticles that reduces water loss and prevents dehydration.
A recent genetic study found that centuries of human activity, including trade and rituals, have mixed the genetic lineages of the critically endangered Central American river turtle. The turtles' shells made them easy to transport, allowing them to be brought together from isolated river basins.
Researchers discover house mice acquired warfarin resistance from Algerian mice through interbreeding, highlighting multiple pathways to trait evolution. This unusual process helps explain rodents' ability to resist poison and informs strategies for controlling evolved resistances.
A new study by University of Bristol biologists found that mother foxes determine which cubs stay and which leave their family groups, with dominant females playing a crucial role in dispersal strategy. This unique discovery sheds light on the evolution of social behavior in mammals.
Research suggests that venom-targeted proteins evolve rapidly in mammals that eat snakes, implying a defensive role for venom. This finding contradicts the traditional view that venom evolves as a feeding adaptation.
A study published in Evolutionary Applications found that genetically modified Atlantic salmon can reproduce and pass their genes to the wild, posing a danger to wild populations. The research explores the potential reproductive implications of GM salmon as they are considered for commercial farming.
Researchers discovered a genetic switch controlling limb development in ancient fish, suggesting that the recipe for limb development is conserved across species. The discovery challenges previous findings and provides new insights into the evolution of limbs in tetrapods.
Researchers have identified a single nucleotide change that underlies variation in fruit morphology across different plant species, including Brassica and rice. This discovery suggests that evolutionary development may offer insights into plant breeding.
A research team from Kansas State University has found that the chromosome sizes within each eukaryotic species are similar rather than drastically different, and share a similar distribution pattern. This discovery will help scientists better predict evolutionary adaptations and understand core components of biological evolution.
Research reveals that genetic divergence, rather than ecological adaptation, is responsible for the reproductive isolation of lungless salamander populations. The study found strong associations between genetic and ecological divergence, but only nuclear divergence was linked to hybridization.
Researchers sequenced 40 new specimens of thaliaceans, a type of free-swimming tunicate, to gain insights into their evolutionary relationships. The study found close ties between thaliaceans and sea squirts, revealing a common ancestor for these groups.
Researchers have discovered that subtle genetic changes can significantly impact an organism's size and shape. The study, led by David Stern at Princeton University, found that five specific genetic changes contribute to the evolution of distinct morphologies in fruit flies. These findings provide insight into how individual mutations ...
A recent study confirms that Cuban crocodiles in the wild are hybridizing with American crocodiles, posing a significant threat to the species' survival. This genetic interbreeding may lead to both replacement and genetic mixing, potentially causing the extinction of one lineage.
Researchers from the University of Pittsburgh and UW-Madison traced how a specific gene became activated in optical neurons of a fruit fly species over four mutations. They found that small alterations in transcriptional enhancers caused 'leaky' gene activity, leading to the development of a new trait.
Researchers found that female zebra finches inherit the disposition for infidelity from their fathers, who had also engaged in promiscuity. This genetic predisposition increases the likelihood of extra-pair matings, despite costs for females.
Researchers discovered that on average, thirty mutations are transmitted from each parent to their child, revising previous estimations and revolutionizing the timescale used to calculate generations separating humans from other species. This finding has important implications for research tying specific genetic mutations to diseases.
Researchers found nearly indistinguishable mitochondrial genomes between two species, suggesting possible interbreeding. The study's lead author believes the individual could be a hybrid of both species, challenging traditional views on North American mammoth evolution.