Articles tagged with Evolutionary Genetics
Researchers at Ruhr-University Bochum discovered that coral colonies have higher genetic diversity than assumed, with 24-47% of polyps being genetically different. This increased diversity may help corals adapt to environmental changes, but is it sufficient to compensate for the devastating effects of climate change?
Researchers investigate how sex chromosomes allow gene dosage imbalances without negative effects, with a focus on butterflies and moths as model species. The goal is to understand the mechanisms of 'sex chromosome dosage compensation' (SCDC) in different species.
A new study reveals that Egypt was the major gateway out of Africa, with migrants following a northern route. The analysis of 225 genomic sequences from Ethiopians and Egyptians provides crucial insights into early human evolution.
A new study reveals that the panther chameleon, found only in Madagascar, is composed of 11 different species. Genetic analysis and colour patterns confirmed strong genetic structure among populations, with low interbreeding among lineages.
A study led by Mount Sinai researchers compares flu viruses to the measles virus to identify key genes that can't be changed. This could lead to the development of universal flu vaccines and improved protection against emerging viral threats.
Researchers discovered hundreds of genes from an ancestor shared by humans and yeast that remain unchanged over time. The study enables the use of humanized yeast to better understand genetic disorders and test new therapies.
A new genomic study of bee species found that gene regulation and network complexity are linked to the evolution of social complexity. The research revealed changes in gene activity and DNA methylation as social behavior increased, indicating a 'collective genome' less vulnerable to environmental changes.
A study examines the effects of arranged marriages on genetic diversity, finding that Rindi people's relaxed compliance with their marriage rules produces a genetic diversity similar to random mating. The researchers developed an open-source tool called SMARTPOP to analyze other marriage rules worldwide.
Biologists from KU Leuven found that water flea populations can rapidly adapt to rising temperatures and increased heat wave frequencies. The study, using 'resurrected' eggs, showed a 3.6°C increase in critical temperature for activity.
A team of researchers found that limiting migrations among populations of bacteria produced better adaptations and allowed for a wider variety of peaks, enabling the organisms to adapt to their environment more effectively. This 'tortoise-hare' pattern highlights the importance of slow and steady evolution in achieving long-term success.
Wild-type zebrafish outcompete genetically modified Glofish for female mates due to aggressive mating behavior, resulting in the rapid decline and eventual disappearance of the GM trait. The study's findings support the idea that mate competition drives natural selection more effectively than mate choice.
Scientists from the University of Chicago identified a newly-evolved gene, panish, which determines head-to-tail polarity in midge fly embryos. This discovery suggests that genetic changes to fundamental biological processes occur more often than previously thought, and opens new research avenues.
Researchers Jitka Polechova and Nick Barton propose a new theory on why species can't adapt to wider environmental conditions. Their findings suggest that sharp range limits can form even in environments with smooth changes, due to random fluctuations in gene frequencies.
A new study uses fossil data to predict that most rodent species will evolve continuously growing molar teeth over the next 50 million years. The researchers found evidence that many species possess the potential for acquiring dental stem cells, which are required for continuous tooth growth.
A new paper by Dr Michael Weale from King's College London argues that Patrick Matthew deserves recognition alongside Darwin and Wallace as an originator of evolution by natural selection. Matthew's work, published in 1831, captures a valuable aspect of the theory that wasn't clear in Darwin's version.
A new study published in the Genetics journal estimated that humans carry an average of one to two recessive disease mutations, which can cause severe genetic disorders or prenatal death. The study used a unique community's detailed family histories and genealogical records to estimate the number of mutations per person.
Researchers found that genetic mutations selectively shut down genes responsible for red pigments, leading to variations in berry color. This process can result in clonal diversity and impact other vegetatively propagated plants.
A new study from the University of Guelph found that maternal genetic effects play a significant role in determining the fitness of squirrel offspring. Genetically gifted mothers tend to give birth earlier, have more successful pups, and exhibit other traits that contribute to their offspring's success.
Scientists have discovered a new virus infecting archaea beneath the ocean floor, which selectively targets one of its genes for mutation. The study also reveals that these microorganisms use a novel mechanism to accelerate genetic adaptation, targeting at least four distinct genes, and this process may be key to their survival.
Research found that playing music by professionals enhances genes involved in dopamine neurotransmission, motor function, and biological pathways essential for neuronal function. This study provides insight into the molecular mechanisms of music performance and its effects on brain function and learning.
A team of researchers from Michigan State University studied the feral chicken population on the Hawaiian island of Kauai to understand their genetic origins. The study found evidence of hybridization between ancient Red Junglefowl and domestic chickens, suggesting that the population may have originated from interbreeding.
A study by University College London researchers discovered that male birds with physical ornaments tend to have genomes with mildly negative mutations. This leads to reduced fitness in their descendants. The study focused on the Galloanserae bird group, analyzing genetic material from various species.
Researcher David Queller and colleagues tested an alternative mathematical model to inclusive fitness theory, finding it equivalent in predictions. The model's assertions were disputed, with Queller arguing that varying relatedness undermines the Harvard authors' claims about eusociality.
Researchers at the University of Illinois discovered that the hermaphrodite version of the papaya plant, essential for commercial fruit production, arose from human selection by the ancient Maya around 4,000 years ago. This genetic study could lead to the development of a new, more efficient papaya variety.
Researchers at the University of Michigan found that genetic mutations affecting yeast gene expression can impact evolutionary fitness. The study revealed that natural selection favors consistent gene expression, suggesting a link between gene variability and evolutionary outcomes.
A study found a significant decrease in male genetic diversity around 4-8 thousand years ago during global growth, suggesting that wealth and power played a stronger role than natural selection. This decline is linked to sedentary farming and the accumulation of material wealth.
A study found that listening to classical music enhances gene activity related to learning, memory, and synaptic function, while down-regulating genes associated with neurodegeneration. Musically experienced participants showed the most significant effects, suggesting familiarity plays a key role in music-induced changes.
Duke University researchers have found shape-shifting DNA base pairs that can trick the copying machine, leading to random genetic changes. These 'quantum jitters' appear at a frequency similar to DNA copying errors, which might underlie evolution and cancer.
A recent study found that MRSA can persist in households for years, spreading from person to person and evolving genetically. The bacteria can be transmitted through household members, especially those with skin infections, and can even acquire extraneous DNA over time.
A new study found that a vole's aerobic exercise metabolism increased by 48% and basal metabolic rate rose after 13 rounds of selection for enhanced oxygen consumption. Gene expression changes in the heart and liver were identified as the primary adaptive response.
Researchers identified 18 genetic variants associated with maritime pine tree survival under climate stress, improving forecasts of forest growth and reforestation efforts. These findings demonstrate the importance of genetic data in managing biodiversity and commercial forestry amid a changing climate.
A massive study reveals life has been expanding at a constant rate, with new species emerging every 2 million years on average. The 'Time Tree of Life' challenges the traditional notion that adaptation drives speciation, instead highlighting the importance of random genetic events and geographic isolation.
The study identified nearly 3,000 genetic markers that will help researchers investigate the genetic variation within and between different species. The new data will enable scientists to uncover why certain legume crops succeed where others fail.
A new open-source database, Fossil Calibration Database, has been launched to help researchers accurately estimate the origins of all species. The database synthesizes data from the fossil record with molecular evidence, enabling 'molecular dating' studies.
Genetic analysis reveals penguins have lost three basic tastes over evolutionary time, leaving them with only salty and sour flavors. Their unique tongue structure and behavior of swallowing food whole may be adaptations to their environment.
Researchers discovered a fern that is the offspring of two distantly-related plant groups that haven't interbred in 60 million years. The finding challenges traditional views on reproductive incompatibility among species.
Two 160 million-year-old fossils of Agilodocodon scansorius and Docofossor brachydactylus provide evidence of early mammalian ecological diversity. These ancient mammals had adaptations for arboreal and subterranean lifestyles, suggesting genetic mechanisms operated long before modern mammals.
Researchers found a gene called R2d2 that breaks Gregor Mendel's century-old 'law of segregation', leading to unequal inheritance of genes in mammals. This discovery has wide-ranging implications for fields like evolutionary genetics, biomedical science, and infectious diseases.
Researchers identified a gene influencing beak shape in Galápagos finches, which varied among individuals within species. This finding highlights the genetic basis for evolution and natural selection, shedding new light on how species diverge over time.
A team of scientists has sequenced 120 birds to study the evolutionary history of Darwin's finches and identified a gene associated with beak shape variation. The research reveals that hybridization between species played a critical role in shaping the genetic diversity of these iconic birds.
A new methodology called Lasso has been developed to find an evolutionary tree even when some comparisons are missing. The NCYC team evaluated Lasso on their datasets and found it outperformed alternative approaches.
A new study by the University of Sheffield found that genetic differences between humans continue to fuel evolution, despite artificial influences like easy access to contraception and medical advances. The research showed that genetic influence on timing of reproduction and family size tends to be higher in recent times.
Researchers at the University of Maryland have discovered a new mechanism of inheritance in roundworms that could revolutionize our understanding of evolution and disease treatment. The team found that genes can be silenced through a process called RNA interference, and this silencing can persist for multiple generations.
The Centre for Evolutionary Genomics will train PhD researchers in a field that uses latest DNA science to study evolutionary history. The University has received £1 million from the Leverhulme Trust to fund five years of research.
Scientists studied the fly species Scaptomyza flava to understand its transition from a non-plant diet to herbivory. They found that genetic and neurological processes underlying behaviors were drastically remodeled, enabling the flies to seek out healthy plants and lay eggs on them.
A study discovered that genetic variations associated with psoriasis and Crohn's disease are extremely old, predating the evolution of Neanderthals. The research suggests that these genetic features may have played a role in the health and survival of our ancient ancestors.
Researchers discovered that blind predatory water beetles express opsin genes, which are usually found in species with eyes. This finding supports non-adaptive evolutionary theory and suggests that these beetles may have evolved through neutral mutations.
Researchers at Arizona State University have discovered a novel mechanism driving the evolution of green-to-red photoconvertible phenotype in green fluorescent proteins. The study reveals that hinge migration, driven by long-range dynamic motions, can lead to the acquisition of red fluorescence.
A team at Ludwig-Maximilians-Universität München shows that temperature gradients in pore systems promote cyclical replication and emergence of nucleic acids. The researchers demonstrate a setting where pore systems on the seafloor, heated by volcanic activity, can serve as reaction chambers for RNA synthesis.
Scientists have identified several genetic mutations in the Ebola virus that could render sequence-based treatments ineffective. The study found 10 new mutations that may interfere with monoclonal antibody, siRNA, and PMO drugs, highlighting the need to consider genetic drift when developing potential therapeutics.
Researchers found that endogenous retroviruses, constituting around 5% of human DNA, regulate gene expression and have an important regulatory role in the brain. The study suggests that viruses take a firm hold on cellular machinery over evolution, leading to complex brain functions.
A study of rock sponges found that morphology-based taxonomies do not accurately reflect their genealogical relationships. Molecular genetic investigation combined with fossil analysis reveals that traditional classifications are often incorrect.
The study provides comprehensive tracking of maize origin in the Southwest, showing it entered via highland route around 4,100 years ago and later via coastal route about 2,000 years ago. Researchers also identified genes responsible for adaptation to drought and changes in starch composition.
Plant scientists have discovered a new self-incompatibility system in petunias that recognizes and rejects its own pollen, preventing genetic defects. The system involves 18 male proteins recognizing 40 female proteins, which are toxic to the plant's own pollen.
A large-scale survey of venom variation in two snake species reveals no local co-adaptations in eastern coral snakes, challenging traditional views on venom evolution. The consistent venom mix across Florida will aid antivenom development and inform conservation efforts for the declining eastern diamondback rattlesnake.
Researchers found that fragmented chloroplast DNA sequences, known as cpSSRs, are still widely used to study plant genetics. The number of studies using cpSSRs has doubled in the past decade.
Researchers found snakes' vertebral bones have the same number of regions and patterns as limbed lizards, contradicting the idea that snakes evolved from a simplified body form. The study suggests that Hox genes are functioning in snakes to control subtle changes in shape.
Scientists created a new modeling framework to study the relationships between different stages of a plant's life cycle. The study found that changes in environmental factors can affect the duration of subsequent stages. This research has the potential to improve crop yields and conservation efforts amid climate change.
A research team has sequenced the genomes of 16 Anopheles mosquitoes, revealing new insights into how they adapt to humans as primary hosts of malaria. The findings suggest an underlying genetic/genomic plasticity that enables variation in key traits determining transmission capacity within the genus.
Researchers have completed a detailed picture of human color vision evolution, tracing 7 genetic mutations and 5,040 pathways from UV to blue-light vision. The study clarifies molecular pathways at the chemical, genetic, and functional levels.