Articles tagged with Evolutionary Genetics
Researchers discovered that certain cyanobacteria species have evolved rope-building traits to resist erosion and stabilize soil substrates in arid environments. This adaptation allows them to thrive in areas where other microbes would struggle to survive.
A new study reveals a novel mouse gene that reduces Alzheimer's disease pathologies by interacting with a key cellular enzyme. The research found that the gene, Rps23r1, interacts with glycogen synthase kinase-3 (GSK-3) and inhibits its activity, resulting in improved AD-like pathologies in transgenic mice.
A DNA study confirms that Africa's rarest monkey, the kipunji, had an intriguing sexual past with baboons. The results may help to set conservation priorities for this critically endangered species by highlighting the importance of protecting its habitat and preserving genetic diversity.
Researchers have discovered that ancient penguin DNA can significantly challenge the accuracy of traditional genetic aging measurements, suggesting that many specimens may be up to 600% younger than reported. This finding has major implications for our understanding of evolutionary rates and the history of evolution.
The 2009 AAAS Kavli Science Journalism Awards honored excellence in science reporting, including a story about probability told through a drifting balloon and a series on a rare genetic disorder affecting a family in rural Montana. The winners will receive $3000 and a plaque at the 2010 AAAS Annual Meeting.
Osedax marine worms feast on submerged bones using symbiotic bacteria, with unique sexual and digestive habits and diverse habitats across the world's oceans. Recent research discovered up to twelve further distinct evolutionary lineages exist beyond the five species already described.
The Genome 10K Project aims to sequence the DNA of approximately one species per genus of living mammals, birds, reptiles, amphibians, and fish. This will help reconstruct the genetic changes that gave rise to diverse life forms on Earth, with potential benefits for human and animal health, as well as conservation efforts.
Scientists have observed the emergence of a new adaptation strategy in bacteria Pseudomonas fluorescens, where variable offspring can survive in different environments. This bet-hedging strategy allows for species survival under rapidly changing environmental conditions.
Researchers have identified heterochromatin, a gene-poor compartment of DNA, as the key to explaining reproductive isolation. Odysseus, a fruit fly gene, has been found to interact with rapidly evolving DNA in heterochromatin, leading to hybrid sterility.
A University of Michigan study found that color differences in fruit flies have a common genetic basis with those in humans and chimps. Genetic analysis revealed the tan gene as responsible for part of the color variation within and between species.
A study by University of Oregon researchers found that nematode worms with partners were more resistant to genetic mutations and better adapted to changing environments. This suggests that having a mate provides an evolutionary advantage over self-fertilization, leading to longer lives for offspring.
Researchers developed a genetic family tree for cows and ruminants, spanning 29 million years, using a new technique that also applies to humans. The study provides insights into cattle domestication, breed formation, and evolutionary connections to humans.
Researchers analyzed ancient bison genetic mutations to identify important variations in domestic animals, potentially improving agricultural breeding programs and disease resistance. The study also revealed the evolutionary history of the ruminant family tree and provided insights into climate change adaptations.
Researchers mapped the sex chromosomes of cichlid fish from Lake Malawi and identified a mechanism for evolving new sex chromosomes. A genetic conflict over color patterns led to the emergence of new sex determining functions, resulting in distinct sex chromosomes among related species.
A University of Toronto-led team has identified the evolutionary ancestry of the prion gene, revealing its connection to ZIP family metal ion transporters. This discovery may provide new insights into prion protein function and underlying mechanisms of diseases like BSE and Creutzfeldt-Jakob disease.
A comprehensive study sheds light on the origin of whales and dolphins by analyzing morphology, behavior, and genetics of living and fossil relatives. The findings suggest that cetacean ancestors transitioned to water before becoming carnivorous, with a 48-million-year-old semi-aquatic herbivore named Indohyus being a key discovery.
Researchers at the University of Oregon have found that evolution can only go forward, as genetic mutations block paths to ancestral genes. The team resurrected ancient proteins and manipulated them to study reverse evolution, discovering that restrictive mutations act like an evolutionary ratchet, preventing reversal.
Dr. Jue D. Wang and Dr. Iiris Hovatta have been awarded the Rosalind Franklin Young Investigator Awards for their pioneering work on DNA replication regulation and neuropsychiatric diseases. They will receive a $75,000 award over three years to support their research.
Genetic sex determination allowed ancient marine reptiles to thrive in open oceans with live birth, freeing them from land-based nesting. This adaptation led to extreme physical changes and diversification of species.
The fisheries industry's pursuit of consumer-friendly fish products is impacting fish populations worldwide. Scientists have found that repeated selective harvesting is causing changes in fish morphology, development, and behavior.
A new bioinformatics study evaluates the reliability of computer models predicting DNA mutation effects on human health. The research team identified regions of the genome where benign mutations tend to occur, allowing for more accurate predictions.
A new study found that species living in restricted environments, like the tropics, lack genetic variation and can't adapt to climate change. This limitation affects many species, including insects, mammals, and fish, making conservation efforts more challenging.
Gladstone scientists have found the first genetic link between reptile and human heart evolution, linking protein Tbx5 to the development of four-chambered hearts in turtles and humans. The study sheds light on the evolution of warm-bloodedness and provides insights into congenital heart disease.
Deer mice living in Nebraska's Sand Hills rapidly adapted to their environment by evolving lighter coloration, providing better camouflage against visual predators. This genetic change arose from a single mutation in the Agouti gene, driven by natural selection favoring pale coloration.
A team of Texas and Brazilian researchers confirms that the fungus-gardening ant Mycocepurus smithii reproduces without males, with no evidence of male production or sperm storage organs. This makes the species one of the rarest examples of complete asexuality in the animal kingdom.
A new study found that a vitamin D-regulated anti-bactericidal protein has been conserved in humans and primates for 60 million years. This suggests its critical role in their survival and highlights the importance of maintaining adequate levels of vitamin D.
Scientists at the University of Toronto's Department of Ecology and Evolutionary Biology discovered a novel gene, Ultrabithorax, responsible for water striders' unique body form. The gene lengthens mid-legs while shortening hind-legs, allowing water striders to glide on water.
A study found that human populations began to expand in size in Africa around 40,000 years ago, supporting the hypothesis that population growth played a significant role in the evolution of human cultures. The research used genetic evidence and computational approaches to simulate the evolution of genetic lineages over time.
A team of researchers has developed a new cell programming method called MAGE, which enables rapid refinement of bacterial genomes. By editing multiple genes in parallel, the researchers transformed E. coli cells into efficient factories that produce a desired compound in just three days.
A global team of researchers has developed tools to analyze the genetic diversity of rice, a crucial step towards improving crop yields and securing global food supplies. The comprehensive SNP information will enable exploration of rice diversity for understanding gene function and improving important traits.
A study published in Proceedings of the National Academy of Sciences reveals that California's horned lizard diverged into at least three new species when it moved north from Baja California. The findings provide clarity for conservation actions to follow, highlighting the importance of integrating genetic, anatomical and ecological in...
The Ecological Society of America presents the Eminent Ecologist Award to Steven Hubbell for his neutral theory of biodiversity and biogeography, while Jerry Jenkins, Glenn Motzkin, and Kirsten Ward receive the Cooper Award for their work on plant succession. The Mercer Award is given to Richard Lankau and Sharon Strauss for their pape...
Researchers found that most pairs of black-legged kittiwakes avoid inbreeding more often than chance, suggesting they can detect relatives in large populations. Inbred pairs produced fewer hatching eggs and chicks with lower survival rates.
Pitt researchers describe the 90-year evolution of H1N1 swine flu, tracing its genetic roots back to a 1918 respiratory illness in pigs. The current strain shares common ancestry with older flu strains, potentially offering partial immunity to new pandemic viruses.
A new UCF study is using population genetics to aid in the conservation of the Lower Keys marsh rabbits (Sylvilagus palustris hefneri), which are estimated to have less than 300 individuals remaining. The research aims to identify genetically diverse populations and relocate them to create a new habitat.
Researchers at UC Santa Barbara have identified genes that regulate flower color change, revealing a predictable pattern of evolution. The study found that hawkmoths prefer white or yellow flowers over red ones, driving natural selection to shift flower colors.
A new study on seed beetles reveals that low genetic quality males are more successful in fertilizing eggs, contrary to predictions. Females' multiple mating does not guarantee the sperm of the highest genetic male.
Researchers have identified a crucial role of the Foxp2 gene in human language development using a mouse model. The study found that alterations in this gene are closely linked to speech and language ability, and that it plays a significant role in various organ systems.
A new algorithm developed by Carnegie Mellon University has revealed how genetic networks in fruit flies evolve during their life cycle. The Tesla algorithm uses machine learning techniques to analyze the rewiring of these networks over time, providing insights into how they respond to stimuli and become dysfunctional.
A new computing method called SATé can determine the relatedness of living things much faster and accurately analyze DNA sequences that are rapidly evolving. It creates detailed, accurate evolutionary trees that reveal the relationships among plants, animals, and other organisms.
Researchers found that certain microorganisms like E. coli and wine yeast have genetic networks that allow them to 'foresee' upcoming events and respond accordingly. This adaptation increases their chances of survival, similar to how Ivan Pavlov's dogs learned to salivate in response to a stimulus.
Dr. Michael J. Wade, a renowned evolutionary biologist, will receive the 2009 Sewell Wright Award for his seminal contributions to multi-level selection and the study of evolution. His work has been cited over 5500 times and has formed a significant part of the conceptual landscape for the 'levels of selection' discussion.
Researchers identified genetic regions responsible for animal tameness in a rat model of domestication. The study provides insight into the genetics and biology of tameness, potentially leading to more precise breeding strategies for tame animals.
A new study suggests that genetic variations in humans are more closely tied to geographical and historical factors than previously thought. The research found that gene variants tend to be distributed throughout the world in patterns reflecting ancient population movements and other aspects of population history.
Scientists have identified distinct genes responsible for the evolution of pelvis and body armor loss in two species of stickleback fish. The study, published in Current Biology, shows that different genes can have similar effects on evolutionary change, contradicting earlier research.
A study on stickleback fish found that two related species evolved to lose their pelvises using different genes, contradicting earlier research. This discovery sheds new light on the mechanisms of evolutionary diversity and limb loss in nature.
A study analyzing tickle-induced vocalizations in infant and juvenile great apes, as well as human infants, found a common evolutionary origin for laughter. The researchers discovered that laughter evolved gradually over the last 10-16 million years of primate evolution, with humans exhibiting acoustically distinct features.
A new study suggests that high population density catalyzed the emergence of modern human behavior, driven by increased exchange of ideas and skills. This skill maintenance, combined with a greater probability of useful innovations, led to the appearance of modern human behavior at different times in different regions.
Joseph Felsenstein and Louis J. Gross, both Central High graduates, received the 2009 and 2006 AIBS Distinguished Scientist Awards for their significant scientific contributions to integrative and organismal biology.
Researchers found that unstable junk DNA helps tune gene activity, allowing organisms to rapidly adapt to changes. This discovery suggests that 'junk' DNA has a functional role in the evolution of our genome.
Researchers Ulrich Gerland and Terence Hwa discovered two opposing principles guiding gene regulation in microbes: 'use-it-or-lose-it' and 'wear-and-tear'. These mechanisms adapt to environmental changes, with the latter mitigating detrimental effects of constant use.
A University of Michigan study found that snails' venoms evolved to target a broader array of prey when they experienced ecological release, allowing them to expand their diet and habitat. The research provides insight into the genetic basis of this phenomenon and its implications for our understanding of adaptation and evolution.
The study compares genetic structures of Arabidopsis thaliana and Persea americana to understand how the first flowering plants evolved from non-flowering plants. Researchers found significant overlap among organ types, suggesting a genetic 'fossil' that allowed for flower transformation.
Two ancient genes in beetles were found to be co-opted for a new trait, challenging the idea that fundamental genes cannot acquire new functions. The study also suggests that developmental genes are candidates for recruitment and may not be as constraining as previously thought.
A team of biologists at the University of Texas at Austin has created a nearly complete collection of genes for a species of reef-building coral, revealing approximately 11,000 different genes. This genetic database will enable researchers to study natural variations in corals and their responses to stress, facilitating an explosion in...
A study by CSHL and CCNY found that zebra finches raised in isolation develop a song culture after introducing improvisations from their tutors, eventually resembling wild-type songs. The results provide insights into the evolutionary process of language.
A new approach has been developed to reconcile the conflict between fossil and molecular data in evolutionary studies. A recent study found a strong match between the two methods, with lineages defined by their physical appearance showing an imperfect but very good fit to molecular data.
Breakpoint regions on chromosomes contain a higher density of genes and are more susceptible to breakage, leading to genetic variation. The study found that rearrangements in these regions can lead to new sources of variation, potentially subject to natural selection.
A comprehensive study resolves decades-long debates on early animal relationships, revealing that sponges and comb jellies share a common group with bilaterians. The research also sheds light on the evolution of nervous systems, suggesting they developed only once in animal history.
A groundbreaking study at Brandeis University has shed light on a crucial step in the complex process of genetic encoding for the first time. The researchers report that they were able to crystallize a large complex of a macromolecular machine in the human cell and determine its structure, zeroing in on the process of RNA splicing.