Articles tagged with Evolutionary Genetics
The discovery of microRNAs in octopus species reveals a common role in advanced brain development and cognition, linking the evolution of intelligent life. MicroRNAs regulate protein expression, diversifying cell function and enabling complex organisms to perform specialized tasks.
Researchers identified a single protein, FETUA-3, that inhibits a broad spectrum of rattlesnake venom toxins. The discovery may lead to the development of improved snake bite treatments and novel therapeutic options.
Research at the University of British Columbia found that intensive agriculture has driven rapid evolutionary change in waterhemp, a North American native plant, turning it into a problematic weed. The study compared genetic samples from modern farms and historical specimens to track evolution over two centuries.
A recent study found that Denisovan DNA sequences near immune-related genes in modern Papuans regulate their activity, affecting how people respond to infections. The research suggests that Denisovan DNA contributed to the adaptation of early modern humans living in New Guinea and nearby islands.
A study found that genetic variants near ERAP2 and TICAM2 provided protection against Yersinia pestis, the bacterium responsible for the Black Death. These variants were also associated with improved detection and resistance to other pathogens, but at a cost: increased risk of autoimmune disorders like Crohn's disease.
A husband-and-wife research team at UC Riverside found a simpler gene network is involved in specifying the gut in nematodes related to Caenorhabditis elegans. The discovery was made possible by the COVID-19 pandemic, which freed up time for the researchers to explore their question of how nematodes develop their gut.
Researchers discovered a new ancient branch of life, Provora, comprising microbial predators that nibble prey to death. These microbes, called nibblerids and nebulids, were found in marine habitats globally and differ by 170-180 nucleotides from all other living things.
A new study pinpoints the first-ever domestication of cats to nearly 10,000 years ago in the Fertile Crescent region. Genetic analysis reveals that humans' transition from hunter-gatherers to farmers sparked the bond between humans and rodents-eating cats, leading to their migration with humans worldwide.
A group of biologists is exploring the potential of seed banks, frozen zoos, gene editing, and assisted gene flow to create second chances for species affected by climate change. By understanding local adaptation strategies, conservationists can design more effective conservation actions.
A study finds that microbial communities can rapidly respond to temperature fluctuations by re-activating latent species adapted to thrive at different temperatures. This 'species sorting' mechanism allows communities to survive in response to changing environmental conditions.
A simple breeding experiment identified genes that promote cooperation and higher yields in plant populations. Plants with specific alleles were found to produce 15% more biomass when grown in close proximity, while reducing root competition.
Researchers at Uppsala University have discovered a crucial DNA sequence in jawed vertebrates that plays a major role in shaping the joint surfaces during embryonic development. This finding has significant implications for understanding the evolution of vertebrate jaws, which is believed to have occurred around 423 million years ago.
A study published in the Journal of Archaeological Science reveals that a domestic dog lived in the Palaeolithic period 17,000 years ago in the Erralla cave in the Basque Country. The bone remains identified as Canis lupus familiaris, making it one of Europe's most ancient domestic dogs.
A team of scientists found that bats have multiple copies of the PKR gene, allowing them to develop an antiviral repertoire. This adaptation enables bats to defend themselves against a wide range of viruses.
A global analysis of matches and mismatches between human genetic and linguistic histories found that populations often shift to neighboring languages despite genetic differences. This suggests that giving up one's language isn't difficult, but preserving original linguistic identity is rare despite genetic assimilation.
A study reveals that porcini mushrooms have evolved in different ways across the globe, with local ecological factors playing a stronger role in maintaining genetic distinctiveness than genetic flow. The findings challenge traditional notions of species development and suggest multiple evolutionary strategies for this organism.
A large-scale analysis of over 2,700 species of anurans reveals that the vertebral stripe evolves repeatedly and is adaptive to the animal's habitat. The study identifies a key gene linked to the stripe pattern, which may allow species to adapt to environmental changes.
Scientists have identified a single 28-million-year-old receptor gene that allows plants to recognize and respond to caterpillar peptides, a common threat. This ancient gene has evolved over time, with some plant species losing it, and its reintroduction through breeding or genetic engineering could protect crops against failure.
A new web-based tool called Taxonium is helping scientists track the evolution of SARS-CoV-2 and other viruses by analyzing massive genetic datasets. The analysis reveals that COVID-19 variants worldwide are repeatedly evolving the same mutations, suggesting a convergent evolutionary process.
Researchers have developed a tool that maps breast cancer growth and highlights the role of surrounding cells in controlling disease spread. The new technology provides insights into cancer evolution, genetics, and environmental interactions.
A genetic variant associated with a 10-15% reduction in fat storage has been identified in 60% of Europeans. Researchers studied the effect of this variant in mice and found it to be linked to leanness, highlighting the complex interplay between genetics and obesity.
Researchers identified a genetic variant that predisposes people to being slim, carried by 60% of Europeans. The variant affects the amount of fat stored in the body and is associated with the biochemical signalling pathway that tells cells what nutrients are available.
Researchers have published seven draft genomes for Nordic hare species, including three heath hares with distinct grey/blue winter pelage. The findings suggest the heath hare colonized Scandinavia from the south after the last ice age, diverging from the mountain hare population.
A new study found that large river dams are significant barriers to platypus movements, leading to increased genetic differentiation and vulnerability to threats. This restriction of movement limits gene flow between groups, making separate populations more susceptible to inbreeding depression and loss of adaptive genetic variation.
Researchers used DNA from two ancient human individuals to unravel the deep demographic history of South America, providing new genetic evidence supporting existing archaeological data. They also discovered migrations along the Atlantic coast for the first time and found evidence of Neanderthal ancestry within ancient genomes.
Scientists discovered that ancient fish favored cold, dark waters of the deep sea, challenging the assumption that shallow habitats have always been diverse. The study revealed three major events that drove speciation rates in the deep sea, including the breakup of Pangea and the Cretaceous Hot Greenhouse period.
Researchers at CSHL have created genetic blueprints for two types of groundcherry, which can guide plant geneticists in unlocking their potential. The new models also uncovered a gene essential for inflated calyx development, shedding light on the evolutionary process behind this unique trait.
Researchers from Trinity College Dublin have identified several new species of sunbirds, including the Wakatobi Sunbird, found on tiny Indonesian islands. The study reveals unique evolutionary processes and adds to our understanding of the importance of biodiversity in this region.
Researchers analyzed DNA from victims and survivors of the Black Death to identify genetic differences that determined who lived and died. The study found four genes involved in immune defense against pathogens, with versions of these genes linked to increased susceptibility to autoimmune diseases.
Researchers analyzed DNA from 13 Neandertals, finding evidence of a close-knit community with 10-20 individuals. Genetic data suggests that female migration played a key role in maintaining the group's cohesion, contradicting previous theories about male-dominated movements.
Researchers have discovered a family of selfish genes, wtf, that have survived for over 100 million years in yeast, contradicting established beliefs on their longevity. These 'killer meiotic drivers' transmit themselves to half of offspring and destroy reproductive cells without being suppressed by natural selection.
A new dataset provides an unprecedented insight into the Arctic Ocean's biological life, revealing a year's worth of microbial communities and their responses to climate change. The EcoOmics dataset aims to guide conservation efforts and provide evidence for novel biology that may influence our understanding of evolution on Earth.
Scientists are conducting a first-of-its-kind study to investigate the origin of psychedelic compounds in fungi, including psilocybin found in 'magic mushrooms'. The research aims to understand the evolution of these compounds and their potential applications in medicine and conservation.
Genetic and genomic technologies can protect marine life by identifying illegally harvested seafood products and monitoring disease outbreaks. Assisted evolution and synthetic biology could also benefit ocean ecosystems by introducing beneficial species or manufacturing products in the lab.
Researchers found that horizontal gene transfer can accelerate bacterial adaptation under most growth conditions, but not all. By analyzing the fitness effects of gene transfer, they can predict when it will provide an advantage.
Researchers at the University of Zurich have successfully decoded the genome of Aldabrachelys gigantea, one of the world's two remaining giant tortoise species. The reference genome provides crucial information for breeding programs in zoos to represent genetic diversity and conservation efforts across East Africa and Madagascar.
Researchers identified 49 plant genes transferred to the silverleaf whitefly genome, including genes neutralizing toxins produced by plants as a defense mechanism. This discovery opens up new research opportunities for innovative pest control methods based on plant breeding, potentially reducing pesticide use.
Researchers from University of Konstanz discovered a new species of cichlid fishes in Nicaraguan crater lake Xiloá through genetic hybridization. The hybrids exhibit transgressive traits and occupy a unique ecological niche, outcompeting parental species for food resources.
Researchers uncover previously unknown lineage of wild goats over 10,000 years old in the Taurus Mountains of southern Turkey. The discovery sheds light on the region's faunal history and highlights the impact of climate change and human activity on ancient populations.
A large wingless wood-eating cockroach unique to Australia's Lord Howe Island has been rediscovered at the foot of a single Banyan tree. The species was thought extinct since the 1930s, but its genetic difference from offshore relatives suggests it may have survived due to co-evolution with ground-dwelling insects.
This study reveals genetic insights into artificial selection and ecological adaptation in silkworms, identifying 468 domestication-associated genes and 198 improvement-associated genes. The pangenome dataset also sheds light on the origins of domesticated silkworms and their economic traits.
Researchers found the moths originated from the Baja Peninsula and Arizona, with a new subspecies discovered in western North America. The study recommends using synthetic pheromones to control the invasive pest.
Brown algae's unique pigments have evolved through a complex genetic pathway, enabling them to harness more light energy than green plants. This discovery could lead to insights into fucoxanthin's health applications and improved photosynthetic efficiency for biofuels production.
A study published in Science found that more than one-tenth of the world's terrestrial genetic diversity may already be lost due to climate change and habitat destruction. This could have serious implications for species' ability to adapt to climate change, highlighting the need for urgent conservation efforts.
A new computer program, ExtRaINSIGHT, has been developed to track harmful mutations in the human genome throughout evolution. The study found three regions of the genome that are extremely sensitive to mutations, including splice sites, miRNA molecules, and central nervous system genes.
A recent genetic study has found that three-quarters of the Early Medieval population in Eastern England was comprised of migrants originating from Continental regions bordering the North Sea. These migrants intermarried with local populations, but integration varied greatly from region to region.
Researchers deciphered the diversity and evolution of nerve and gland cell types in sea anemones, revealing common progenitor populations and conserved regulatory mechanisms. The study highlights a remarkable ability of sea anemones to maintain neural balance throughout their lives.
Research found that human brain hemispheres have distinct functional patterns, with regions on the left and right sides specialized for different tasks. Individual differences in these arrangements were heritable, suggesting genetic influence, while environmental factors also play a role. The study also compared humans to monkeys, find...
A new study finds that lab adaptation involves mutations to highly conserved proteins, but natural adaptation exhibits more complex patterns, including non-conservation within functional domains. Lab conditions differ significantly from natural environments with variable and changing selective pressures.
Researchers produced human and chimpanzee brain organoids to investigate the role of ARHGAP11B in brain evolution. The study found that the gene is essential for neocortex development, with its absence or inhibition leading to decreased levels of critical brain stem cells.
A new study from Harvard University identifies the genes and genetic sequences that orchestrate the formation of the human pelvis during pregnancy. The research shows that key pelvic features form around 6- to 8-week mark, including a curved and basin-like shape.
Researchers at Stockholm University solved the mystery of the supergene responsible for distylous flowers with differing lengths of male and female sexual organs. The study reveals that the supergene itself varied in length, with a dominant form containing about 260,000 base pairs of DNA.
Threespine stickleback fish evolved resistance to freshwater tapeworms by forming scar tissue around them, which prevents the worms from growing. However, this defense has a significant fitness cost for female sticklebacks, as they are 80% less likely to successfully breed due to the accumulated scarring.
Research suggests that COVID-19 patients can transmit viruses with multiple genetic sequences simultaneously, which may impact the development of new variants. This complex sequence diversity highlights the need for continued research into the evolution and transmission of SARS-CoV-2.
Researchers found that modern human brains produce more neurons than Neandertal brains, particularly in the frontal lobe, due to a single amino acid substitution in the TKTL1 protein. This increase is attributed to changes in metabolism and membrane lipid synthesis.
Two papers published in Nature Plants unveil the first full-length genomes for homosporous ferns, a group containing 99% of modern fern diversity. The Ceratopteris genome suggests that ferns stole genes from bacteria for anti-herbivory toxins.
Researchers have identified eight new species of tiny brown geckos in Madagascar's rainforests, expanding our understanding of their distribution and evolution. The discovery highlights the importance of continued sampling across the region to uncover new species.
A new study reveals that the emergence of a new gene called PGBD1 is linked to the evolution of a new structure in nerve cells. PGBD1 controls paraspeckles, tiny structures that act like traps for RNAs and proteins, and its regulation is crucial for nerve cell development.
Researchers found that corals can pass somatic mutations to their offspring, which increases genetic diversity and provides a potential route for evolutionary adaptation. The discovery challenges conventional wisdom on the role of reproductive cells in evolution.
Researchers identified a group of Ashkenazi Jews who fell victim to antisemitic violence during the 12th century, shedding new light on Jewish medical history in Europe. The study suggests that a bottleneck event shaped the modern-day Ashkenazi Jewish population prior to the 12th century, earlier than previously believed.