Articles tagged with Evolutionary Genetics
Scientists have uncovered the genetic and metabolic mechanisms that allow certain plants to conserve water and thrive in semi-arid climates. By studying the unique metabolic processes of CAM plants, researchers aim to transfer these traits into bioenergy and food crops.
Researchers have identified the cluster of genes responsible for reproductive traits in Primula flowers, which Charles Darwin first noted as important over 150 years ago. The study reveals that these genes, controlled by a supergene known as the S locus, are specific to one form of flower and date back 51.7 million years.
A study found that people with genes for high educational achievement tend to marry and have children with similar DNA. This assortative mating increases genetic and social inequality in future generations. The researchers argue that this could lead to a cycle of increasing inequality.
Researchers have discovered that a common species of Asian tree frog (Hyla japonica) may be two separate species, with distinct evolutionary relationships between East and West Japan. The study's findings could lead to reassignment of the species' scientific name and shed light on the historical mystery surrounding its discovery.
A study published in Avian Research has confirmed the Hen Harrier and Northern Harrier as two distinct species using genomics and molecular phylogenetics. The classification will aid national conservation efforts, particularly for the European Hen Harrier under threat from grouse hunts.
Elizabeth King, a Mizzou biologist, has received a $1.6m NIH grant to study the impact of genes on diet-induced health problems like obesity and diabetes. She will use fruit flies to investigate how nutritional resources affect life history and reproduction.
Researchers assembled a comprehensive tree of prokaryotic life, exploring grand patterns of evolutionary change. The findings suggest that diversity is not limited by existing diversity or environmental changes, but rather results from random lineage splitting.
Scientists have discovered a new dominant ant species in Ethiopia displaying signs of supercolony formation, expanding rapidly into disturbed habitats and potentially posing a global threat. The species, Lepisiota canescens, exhibits characteristics reminiscent of invasive species, including high densities and ecological dominance.
A team of geneticists found that mammary glands emerged due to the recycling of Hox genes, which are responsible for organizing organ formation during embryonic development. This discovery explains how placental mammals and marsupials developed mammary glands, but not in platypuses.
Researchers at the University of Oxford have found that dietary composition affects DNA sequences in parasites, revealing a previously hidden relationship between cellular metabolism and evolution. The study also shows that it is possible to predict diets based on genetic analysis.
Researchers found that bacteria that become dependent on their environment for essential nutrients outperform those that can produce them independently. The study's results suggest that this loss of autonomy may be an evolutionary advantage driving adaptation in bacterial populations.
A recent study on two echolocating bat species found a contraction of smell receptors and loss of vision-related genes, indicating evolutionary trade-offs. The research also revealed genetic adaptations associated with high altitudes in the great leaf-nosed bats.
The leaf-mining pygmy moths and white eyecap moths have a rich evolutionary history that dates back to the early Cretaceous period, around 100 million years ago. A new classification system has been established based on DNA analysis, revealing three new genera in South and Central America.
A new whole-genome analysis reveals that chimpanzees and bonobos had a historical genetic flow, which sheds light on processes that may have played a recurring role in great ape evolution. The study found evidence of gene flow between the two species between 200-550 thousand years ago.
Research from the University of East Anglia found that some fish species, like the Winter Skate, are adapting to warmer oceans through epigenetic changes rather than genetic evolution. This allows them to cope with changing environmental conditions and may be vital for their survival in the face of climate change.
Researchers found a genetic mutation responsible for the loss of limb formation instructions in snakes, which are unable to form limbs. By restoring the missing DNA sequence in mice, scientists demonstrated that snakes' inability to form limbs is due to a critical stretch of DNA involved in limb growth.
Researchers found that different species can evolve the same beneficial trait through unique genetic mutations, challenging the predictability of evolutionary changes. High-altitude bird species developed red blood cells with hemoglobin proteins that bind oxygen more efficiently.
New research reveals that human transport has a significant impact on the genetics of marine species, disrupting natural patterns and leading to unexpected consequences. The study found a mosaic of genetic patterns in a native invertebrate species, suggesting that anthropogenic activities are altering genetic composition in native ranges.
Scientists have reclassified the Caesalpinia group, including Brazil's national tree Pau-brasil, into a unique genus called Paubrasilia. The study reveals that Pau-brasil represents a distinct evolutionary lineage, highlighting its cultural and historical importance.
A recent study found a measurable bias toward European ancestry data in top genomic databases, with African ancestry data underrepresented. This bias can lead to inaccurate medical genetic diagnoses and higher costs, highlighting the need for greater diversity in genomic databases.
Ferns are inaccurately depicted as extreme inbreeders in most biology textbooks, but research suggests this is not the case. New study co-authored by KU researcher Christopher Haufler reveals that ferns use outbreeding to produce genetic variation, contrary to long-held assumptions.
Researchers at Ben-Gurion University of the Negev have discovered a unique genetic basis for autism that may enable earlier diagnosis. The study found distinct genomic characteristics and evolutionary forces shaping autism genes, which could help identify new candidate genes.
Researchers have discovered that a yeast gene called XRN1 rapidly evolves to recognize and destroy attacking viruses. This finding suggests that non-immunity proteins can play a role in viral defense. The study's results provide new insights into the genetic arms race between hosts and viruses.
A new study examining the genetic history of eczema finds that a key genetic variant strongly associated with the disorder has no apparent adaptive value. The research suggests that the variant may have simply endured due to chance rather than providing any survival or reproductive benefits.
Researchers studied rates of mutation in a range of organisms and found that males contribute more genetic mutations than females. This male mutation bias may arise from errors in DNA replication and is critical for understanding disease-associated mutations.
A Stanford University School of Medicine study suggests that prion proteins can help yeast survive hard times and pass advantageous traits down to their offspring. The researchers found that protein-based inheritance is more widespread than previously believed and could play a role in evolution.
Scientists have recovered ancient DNA from a West Indian mammal known as the 'Island Murderer,' tracing its evolution back to 70 million years ago. The study sheds light on the impact of humans on recent extinctions in the Caribbean.
Researchers found that mismatch repair machinery preferentially protects genetic integrity in open chromatin regions, increasing mutation rates in heterochromatic areas. This study provides direct evidence for the role of epigenetic systems in maintaining genetic fidelity.
New research on slobber shows that adaptation isn't just about creating new tools for survival. The study found repeated instructions in the MUC7 gene helped primates enhance important traits like saliva's lubricity and ability to bind microbes, suggesting evolution favors expansion of tried-and-true genetic tools.
New research reveals that blue-winged and golden-winged warblers are almost identical genetically, with only six regions showing strong differences. The study suggests that conservation efforts should focus on preserving habitat for both species rather than worrying about hybridization.
Researchers from 23 institutions confirm formation of the Isthmus of Panama at 2.8 million years ago, based on geological, oceanographic, genetic and ecological data. This timing has significant implications for evolutionary change, global ocean models, and the origin of modern-day animals and plants in the Americas.
Researchers discovered two distinct populations of Acropora tenuis coral in the Nansei Archipelago, contradicting previous assumptions about its dispersal. This finding highlights the importance of local currents and specific habitat characteristics in shaping coral populations.
Researchers at the University of Washington support global restrictions on trade and collection of the chambered nautilus and its relatives, citing declining populations and unregulated fishing as major issues. The convention on international trade in endangered species will decide which species should be subject to new restrictions.
Scientists have discovered a new species of colorful songbird in the Galápagos Islands, but it's extinct. The San Cristóbal Island Vermilion Flycatcher was elevated to full species status due to genetic differences, with research suggesting two invasive threats likely contributed to its extinction.
Researchers at LMU Munich have sequenced mitochondrial DNA from museum specimens of rare deer species, refining the evolutionary history of cervids. The study identifies novel relationships among species, including confirmation of a second muntjac species in Borneo and polyphyletic genera in New World deer.
Researchers found that Miconia affinis maintains high genetic diversity and facilitates gene flow between forest fragments. The study suggests that this species' colonization capacity promotes ecosystem recovery despite human-altered landscapes.
Scientists have successfully decoded the DNA of Okinawa mozuku, a valuable seaweed species with unique properties. The study provides a platform for future research on its cultivation, growth, and health benefits, aiming to restore production levels and promote sustainable farming practices.
Researchers found that Namibian desert elephants share the same DNA as African savanna elephants due to their high learning capacity and long-distance migrations. They possess unique survival skills, including sand-wetting and water conservation techniques.
Reef fish are adapting to higher CO2 levels by changing their circadian rhythms, a key finding from genomic research. The study found that fish can adjust their internal clocks to compensate for elevated night-time CO2, allowing them to survive in altered environments.
Researchers found that eastern and red wolves are not evolutionarily distinct species but a hybrid of gray wolf and coyote ancestry. The study concludes that the ESA should protect hybrid species due to common interbreeding in the wild, which may not be harmful.
A DNA study of New Zealand's acanthisittid wrens has provided evidence that the country was not completely submerged under the ocean around 21 to 25 million years ago. The research found divergences among the species, suggesting they have been resident in New Zealand for over 25 million years.
A novel picornavirus has been found to be a key suspect in the development of Avian Keratin Disorder, a debilitating condition causing beak overgrowth and impairing feeding and preening behaviors. The discovery provides a critical lead in understanding the emergence of this disease in wild bird populations worldwide.
A new study reveals that genetic factors play a crucial role in shaping the brain's cortical pattern, with close relationships between genetic variants across different regions. The findings suggest potential functional relationships among cortical brain regions, shedding light on the complex mechanisms underlying brain development.
A four-year NSF grant supports Elizabeth Ostrowski's research on the evolution of social cooperation in Dicty amoebae. The study explores how organisms can work together despite individual benefits from cooperation, and how this cooperation is influenced by evolutionary pressures.
A recent study published in Science found that early farming populations had deep genetic differences, indicating distinct ancestries. The research identified similarities between Neolithic farmer's DNA and living people from southern Asia, suggesting a federal origin of farming.
A new study shows that the planktonic organism Oikopleura dioica has lost most of its genes related to retinoic acid metabolism, a vital molecule for vertebrate physiology and embryonic development. This finding challenges the idea that evolution always requires more complexity or number of genes in living beings.
University of California, Berkeley paleontologists discover inherited dental features in primates that shed light on a mysterious increase in monkey species during climate change 8 million years ago. The traits will help track genes controlling tooth development and aid scientists in regrowing teeth.
Researchers discovered a gene that enables plants to harness energy from the far-red-light spectrum, potentially increasing plant productivity. This breakthrough could lead to the development of more efficient crop plants and even artificial photosynthesis as an alternative energy source.
Early life forms on Earth are likely to have mutated and evolved at much higher rates than they do today, thanks to a hotter planet billions of years ago. The rate of spontaneous DNA mutation was at least 4,000 times higher than it is now, according to a new analysis from the University of North Carolina.
New research suggests mammals evolved and diversified after the extinction of dinosaurs 66 million years ago, contradicting a long-held scientific theory. Fossil records support this finding, which was achieved by recalibrating DNA evolution rates using reliable fossil data.
Researchers found conserved microRNAs involved in regulating blastema formation across three evolutionarily distant species, including salamander and ray-finned fish. The study suggests a potential common regulatory process for limb regeneration.
A recent study found that balancing selection can increase the frequency of harmful mutations in non-HLA genes within the MHC region. This mechanism may contribute to the prevalence of heritable diseases. The research team used DNA sequencing data from 6,500 individuals to test this hypothesis.
Researchers found placental mammals evolved at a constant rate before the extinction event but accelerated rapidly after, resulting in diverse modern groups like bats and cats. The team analyzed fossils from the Cretaceous to present day, finding a massive spike in evolution rates after dinosaur extinction.
Researchers create innovative framework to examine social behavior in various species, shedding light on the role of genetic polymorphism in shaping individual traits. The study reveals that inherited genetic tendencies can accurately predict social relationships and behaviors.
Researchers at UT Austin developed an enzyme that accurately proofreads RNA for the first time, increasing precision in genetic research and potentially improving medicine. The new discovery may enhance diagnoses made based on genomic information, leading to more accurate medical outcomes.
A recent study by Maria Chikina and Nathan Clark found that during three major independent evolutionary events, mammals returned to the sea, involving many genetic trade-offs. The researchers identified hundreds of genes affected, including those involved in sensory systems, muscle function, skin, and metabolism.
A University of Kansas researcher is studying the co-evolution of flowers with pollinators like bees and hummingbirds, exploring how natural selection has enabled flowers to shift strategies from bee-pollination to hummingbird pollination. She aims to discover the extent to which evolutionary change is predictable.
A team of researchers has pinpointed the genetics behind a select group of garter snakes' ability to eat poisonous newts, revealing an evolutionary 'building blocks' pattern. The study found that resistant muscle evolved after resistant nerves, with the ancestors of garter snakes gaining toxin-resistant nerves almost 40 million years ago.
Non-African humans inherited marginally lower fitness due to Neanderthal inheritance, with estimated 40% reduction in reproductively fit individuals. The study suggests that these harmful gene variants continue to reduce the fitness of some populations today.
A study by North Carolina State University researchers reveals that zebrafish bred for boldness display sleeker bodies and faster swimming abilities compared to those bred for shyness. The findings suggest a link between personality traits, body shape, and locomotion, challenging the idea of independent animal traits.