Articles tagged with Evolutionary Genetics
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.
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 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.
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.
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.
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.
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.
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.
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.
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.
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 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 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 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.
Researchers found that female birds choose partners based on their genetic compatibility, specifically high MHC gene diversity, rather than physical attractiveness. This study provides the first experimental evidence for MHC-dependent mate preference in birds.
A 47 million-year-old lizard fossil has provided key findings on the evolutionary relationships between snakes and other reptiles. The study reveals that snakes evolved independently from limbless lizards, rather than sharing a common ancestry with burrowing reptiles.
Researchers at the University of Nottingham have discovered a complex genetic mechanism controlling plant germination and flowering. The study reveals genes responsible for stress response are also involved in seed germination, offering insights into adapting crops to extreme environmental conditions.
Sodium channels are a key component of animal nervous systems but evolved prior to their development, according to new research published in PNAS. The discovery suggests that complex traits like the nervous system can evolve gradually from pre-existing genes.
Scientists used simple robots to test how altruism evolves over generations. The results matched Hamilton's rule, suggesting that helping relatives increases their chances of passing on genes. This study has implications for swarm robotics and the evolution of cooperation in nature.
A team of scientists used genetic sequencing and supercomputing to determine that Xyloplax is not a new class of animals but rather a rare example of natural selection shaping its life cycle. The study found that Xyloplax has a truncated life cycle, retaining juvenile features into adulthood.
A recent study published in the American Journal of Human Genetics reveals that mutations in a single gene, centrosomal NDE1, may have played a key role in shaping the human cerebral cortex. The research found that these genetic variations were responsible for microcephaly, a condition characterized by abnormally small brains.
Researchers studied fruit flies adapting from sub-Saharan Africa to Europe and found that a gene called crm regulates temperature-dependent traits. The study reveals that changes in this gene may have enabled the flies to survive in colder climates.
A new study analyzed mutations of the 2009 pandemic influenza A(H1N1) virus in Japan, identifying unique triple combination of bird, swine, and human flu viruses. The research revealed rapid mutation of virus strains with an extremely high evolutionary rate, paving the way for the development of new diagnostic kits.
Researchers analyzed genes from nine bee species, revealing unique genetic changes associated with eusociality in highly and primitively eusocial bees. These findings suggest that the evolution of eusociality is an independent process, shaped by distinct genetic signatures.
Researchers have developed a collection of nearly 800 yeast cell strains to study essential genes, which are crucial for life processes. The new genetic tool allows scientists to investigate the function of these genes at different temperatures.
Researchers harness the power of fast-replicating bacterial viruses to evolve biomolecules in the laboratory, generating enzymes with desired properties in just weeks. The phage-assisted continuous evolution approach allows for rapid generation of proteins and nucleic acids with tailored properties.
Major lineages of flowering plants began to rapidly diversify after reaching a point of development that maximized speciation success. The researchers compiled the largest plant phylogeny to date, involving 55,473 species of angiosperms.
Researchers from Wildlife Conservation Society and AMNH discover genetic distinct populations of Indo-Pacific humpback dolphin formed by currents, surface temperature differences, and environmental barriers. The study sheds light on how environmental factors influence population structure in marine species.
A collaborative study between UH and Michigan State University reveals that bacteria evolving quickly can outcompete those that initially grow faster but then become extinct. Understanding these evolutionary dynamics may help design roadblocks to antibiotic resistance.
A team of researchers led by Michigan State University's Richard Lenski found that more adaptable bacteria with potential for future improvement prevailed over competitors with short-term advantages. The study shows that sacrificing some benefits now can lead to a winning move later.
A new DNA study by University of Gothenburg researchers has uncovered over 120 previously unknown bryozoan species in Swedish waters, including a completely new species. The findings shed light on the evolution and relationships of these nearly invisible animals, which are found in marine and freshwater environments.
Rebeiz aims to understand how regulatory switches change to produce evolutionary novelties, such as the horn on a beetle or the eyespots on a butterfly's wings. His research could apply to human genetics, helping to better understand how genetic alterations lead to disease and deformities.
Scientists discovered that the new plant species Tragopogon miscellus has relaxed gene expression control in its earliest generations, allowing it to rapidly adapt. After 80 years of evolution, different patterns of gene expression are now found in every plant, offering new ideas for agriculture.