Articles tagged with Evolutionary Genetics
Three Texas A&M biologists have received NIH Maximizing Investigators’ Research Awards to support their research on type IV pili, darter fish social behaviors and bacteriophages. Drs Koch, Moran and Ramsey will explore bacterial behavior, genetic mechanisms and neural basis of paternal care in fish.
A landmark photosynthesis gene discovery has been made in a poplar tree that enhances plant growth by up to 200% and increases biomass production. The gene, named Booster, has the potential to boost crop yields without requiring more land, water or fertilizer.
Researchers reconstructed the journey of maize into eastern North America, tracing its dispersal routes and history of selection. Ancient genomes reveal a genetic link between Northern Flints and 1,000-year-old Ozark maize, highlighting early adaptations for local climates and culinary preferences.
Researchers found overlapping genetic underpinnings between rhythm-related skills and language-related traits, including dyslexia. The study identified 16 regions of the genome that overlapped between rhythm and language, suggesting a complex genetic architecture shared by these fundamental human traits.
A new whole-genome study challenges the long-held belief that Armenians are descendants of Phrygian settlers from the Balkans. Instead, researchers found a genetic input into the region from Neolithic Levantine farmers, suggesting a large-scale post-Early Bronze Age migration wave across the Middle East.
A novel method has been developed to infer DNA methylation patterns in non-skeletal tissues from ancient specimens, providing new insights into human evolution. The study found over 1,850 sites of differential methylation specifically in prefrontal cortex neurons, linked to genes crucial for brain development.
Researchers have discovered that seemingly 'broken' genes in coronaviruses are retained due to their functional role beyond protein production. These extra genes help control the activity of other viral genes.
Researchers used ancient DNA to uncover novel signatures of adaptation in early Europeans, tracing genetic changes in response to lifestyle shifts. The study identified 14 regions of the genome that underwent significant natural selection, including traits related to vitamin D production and dairy digestion.
An international team of researchers successfully created a mouse using genetic tools from a unicellular organism, challenging the notion that these genes evolved exclusively within animals. The study uses ancient genetic tools to reprogram mouse cells into pluripotent stem cells.
Researchers describe holobiont biology, a multidisciplinary approach uniting seen and unseen realms of life. Microbes outnumber human cells and contribute to biological variation in traits such as disease and body mass index.
A genetic study of five people buried in Pompeii's plaster casts reveals contradictions to long-held narratives about their sexes and family relationships. The analysis emphasizes the importance of integrating genetic data with archaeological and historical information to correct or enrich existing narratives.
Researchers found that plants have multiple enzymes for adding methyl groups to DNA, allowing them to override genetic instructions. The study reveals the evolutionary history of these enzymes and their unique structures, providing insights into plant resilience to environmental changes.
A team of scientists observed a prehistoric unicellular organism, Chromosphaera perkinsii, forming multicellular structures resembling animal embryos. This suggests that embryonic development may have existed prior to the evolution of animals.
Scientists studied Drosophila species' ability to adapt to day length fluctuations, revealing the critical role of the Pdf gene in regulating circadian plasticity. The study found that Drosophila melanogaster has a wider distribution due to its flexibility in responding to environmental changes.
A team from UNIGE analyzed the formation of grooves in dog noses using 3D imaging and computer simulations. They found that differential growth of skin tissue layers leads to the formation of domes, supported by blood vessels.
Researchers demonstrate the first cross-chiral exponential amplification of an RNA enzyme, potentially leading to the development of cross-chiral therapeutics and biotechnologies. The discovery suggests that a bioengineer can create a new form of biochemical evolution by using both left- and right-handed molecules.
A new study finds that the gene for starch-digesting saliva may have first duplicated more than 800,000 years ago, seeding genetic variation that shapes modern diet. This early duplication set the stage for significant variation in the amylase region, allowing humans to adapt to shifting diets with increasing starch consumption.
A study published in Biology Letters reveals that harbor seals in Alaska's Iliamna Lake are genetically isolated from other seal populations across the Pacific. The researchers found significant differences between the lake seals and marine populations, suggesting they may be a unique endemic form of harbor seal.
Researchers found that seven common European forest trees have preserved their genetic diversity over millions of years, defying expectations. This resilience is attributed to unique characteristics such as long generation times and pollen dispersal capabilities.
Researchers have decoded the genetic makeup of 'Samantha' rose variety to create a powerful resource for future comparative genomic studies. The study found that human selection has significantly influenced the genetic diversity of modern roses, but preserving genetic traits is essential for their health and adaptability.
A new study reveals that mountainous regions played a key role in human evolution, providing increased biodiversity and food resources. The Diversity Selection Hypothesis suggests that early humans adapted to steep terrain due to its enhanced environmental conditions.
A groundbreaking study reveals how leafcutter ant farming systems evolved without technology or culture, with the fungus adapting to life under ant cultivation through genetic changes that enhance its ability to break down plant material and defend against diseases.
A new study reveals that ant agriculture and fungus farming originated 66 million years ago, with colonies of ants beginning to cultivate fungi in the aftermath of the asteroid impact. This partnership has evolved over time, with some fungal crops becoming completely reliant on ants 27 million years ago.
Researchers discovered a massive number of evolutionary events in the Asteraceae family on remote islands, resulting from rapid speciation over short time periods. The findings confirm that larger, isolated islands harbor unique species and highlight the importance of protecting this diverse group of plants.
Northern elephant seals nearly went extinct due to overhunting but have since recovered to around 225,000 individuals. The recent study found the species' genetic diversity was reduced during this period, which may impair their ability to cope with future environmental changes.
Researchers discovered a unique change in cardiac troponin I that enables shrews to achieve heart rates up to 17 beats per second. This evolutionary loss removes brakes on heart relaxation, allowing for faster heartbeats. The study provides insights into the evolution of high-heart-rate mammals and potential biomedicine applications.
The study reveals that sea robin legs are sensitive to both mechanical and chemical stimuli, and are covered in papillae similar to human taste buds. The research provides new insights into the evolution of this unique trait, which could offer clues about how humans developed bipedalism.
Researchers at Cold Spring Harbor Laboratory create a roadmap of how prostate cancer spreads throughout the body, showing that aggressive cells seed cancer's rare migrations to bones, liver, lungs, and lymph nodes. The new technology offers a clearer picture of cancer spread and could lead to more targeted therapeutics.
Researchers have identified hundreds of genes and microproteins specific to human hearts, which are also abnormally expressed in heart failure. These findings provide new insights into cardiac disease and suggest potential targets for therapy.
Researchers propose a new model for understanding how new genes can originate through the recycling and innovation of ancestral genes. A study on antifreeze proteins in fish reveals that similar proteins evolved independently from different genetic sources, demonstrating convergent evolution and protein sequence convergence.
A new study from Stanford University provides a tool for conservationists and law enforcement to protect captive tigers and prosecute wildlife crimes. The researchers analyzed the genetic diversity of privately held tigers in the US, finding that many are a mix of wild tiger ancestry, but also reflect characteristics of the illegal trade.
Researchers confirm 15 new species in Characidium genus, including genetic distance smaller than 2% between species with significant morphological differences. The study highlights the need for reevaluation of species classification and evolutionary history.
Researchers observed accelerated presence of genetic variations increasing heat tolerance in European forest fly populations. The pace of new inversions is too slow to make up for the increase in temperatures, putting species with lower genetic variation at risk.
A comprehensive genomic analysis of Atractylodes lancea reveals how natural variations drive its evolution and metabolic adaptations, particularly affecting the production of key medicinal compounds. The study identifies crucial genetic variations influencing the plant's metabolome across regions.
A century-old experiment has pinpointed the genes behind barley's adaptability, enabling its continued survival in rapidly changing environments. Researchers identified key genes that enable flowering at optimal times, allowing crops to thrive despite increased temperatures and droughts.
A Danish study reveals that only children and those with half- or step-siblings enter puberty significantly earlier than children with biological siblings. The study found a two-month difference in girls' pubertal timing and a smaller but still significant gap for boys.
Researchers propose a new approach to understanding cancer evolution, acknowledging the importance of environmental influences and epigenetic changes. By refining the clonal evolution model, they aim to develop more effective cancer therapies that consider the full complexity of cancer cell evolution.
A recent study published in Molecular Biology and Evolution has discovered the genetic background of head shape variation in snail-eating carabid beetles. The researchers identified the odd-paired (opa) gene as a key factor determining the beetle's body shape, which is linked to its feeding strategy.
Researchers discovered that cyanobacteria can anticipate seasonal changes by sensing photoperiod, promoting cold resistance and altering lipid metabolism. This adaptation may have evolved before circadian clocks, suggesting a new perspective on biological timekeeping.
Researchers at FAU aim to identify signatures of natural selection in the human genome, understanding its role in adaptation and disease. The $1.8 million NIH grant will develop powerful tools for complex modes of adaptation from genetic data.
A new species of Antarctic dragonfish, Akarotaxis gouldae, has been identified in waters off the western Antarctic Peninsula. The discovery highlights the fragile state of the Antarctic ecosystem and raises concerns about the impact of commercial fishing activities on this vulnerable species.
Researchers found that cactus diversity is driven by temperature range, sand content in the soil, and seasonal changes. Mexico has the highest biodiversity but lowest rate of speciation due to slower extinction rates.
A new study on baleen whales explores genetic adaptations for survival and size, shedding light on the risks and opportunities for their survival. Genes linked to immunity, ageing, movement, and reproduction were highlighted, providing insights into the evolution of these diverse whale species over 50 million years.
A study sequenced the genomes of nearly 300 rabbits to understand their colonization success. Researchers found that domestication-linked genes are often eliminated in feral populations due to natural selection, leading to a mix of domestic and wild origin. This helps explain how domestic animals can thrive in the wild.
Researchers have sequenced the lungfish genome, which is 90 billion bases long and breaks all records for size. The study reveals that autonomous transposons are responsible for the genomic expansion, but surprisingly, the genome remains stable despite its enormous size.
A comprehensive set of genomic resources for Tausch's goatgrass has been established, shedding light on the evolutionary genetics of wheat. Researchers identified a stem rust resistance gene and a leaf rust resistance gene, which will aid in breeding more resilient wheat varieties.
A new study found that potassium ion channels in the Shaker family were present in single-cell organisms before the origin of the nervous system. This discovery challenges the conventional understanding of how these ion channels evolved alongside the nervous system.
Researchers unveil retrotransposon-derived DNA zip codes that enable myeloma cell internalization, shedding light on cancer evolution and treatment response. The findings highlight the potential of zip-code technology in improving patient outcomes and advancing human health.
Researchers from Tokyo Metropolitan University found that genes on newly formed neo-sex chromosomes in fruit flies tend to evolve sex-biased genes, which give sex-specific phenotypes. This strongly supports the hypothesis that sex chromosomes reduce sexual conflict by imparting beneficial traits to each sex.
Researchers have identified a shared genetic mechanism driving the emergence of similar traits in distantly related plants with prickles. The study reveals that mutations in a specific gene can lead to prickle loss in various species, including crops like eggplants and rice.
Researchers at U of T mapped the spatial distribution of long non-coding RNAs in testes, finding higher levels than previously estimated. The study suggests lncRNAs play a more significant role in male reproduction and may influence sperm development and behavior.
Researchers at Stowers Institute for Medical Research have identified the dengue virus genome's use of less efficient codons in its host's machinery to replicate and spread. This discovery has implications for developing novel antiviral treatments and vaccines, as well as understanding the relationship between viruses and their hosts.
A new study uses machine learning to analyze the genetic diversity of two amphibian species, finding that different processes shaped their evolution. The research suggests that population demographic events and contemporary landscape factors played a significant role in shaping the genetic variation of these species.
A recent study revealed that the rare Tibetan cypress has significantly reduced harmful genetic mutations, thanks to genetic purging. This process allowed the species to maintain its genetic health despite its small population size and habitat constraints.
Researchers have discovered significant chromosomal translocations in the apricot genome affecting acidity and sugar content. The study also found substantial gene flow between plum and apricot, with introgression regions linked to post-embryonic development and pollen germination.
Frogs have been found to rapidly develop tolerance to pesticides through sublethal exposures, allowing them to survive in ecosystems where pesticides are commonly used. This rapid adaptation helps protect populations over generations.
Researchers discovered that nodulation evolved in a two-step process, with the basic genetic toolkit developed first and then refined through multiple genetic mutations. This complex circuit breaker-like mechanism suggests that nodulation is not controlled by a single switch.
A new study has provided insight into the earliest life form on Earth, revealing that it lived approximately 4.2 billion years ago and was capable of a complex biological system. The findings also suggest that this ancient organism possessed an early immune system and was able to exploit its environment.
Researchers found evidence of multiple waves of genetic intermingling between modern humans and Neanderthals, challenging previous theories. The study reveals a more intimate connection between early human groups than previously believed.
Non-flowering bryophytes, including mosses, have sophisticated immune receptor repertoires that can be transferred between flowering and non-flowering plants. This discovery offers a new source of resistance genes against pathogens for major crops facing climate change threats.