Articles tagged with Genetic Diversity
A recent study has found that European beavers have low genetic diversity due to human hunting. The research, led by University of York Professor Michi Hofreiter, analyzed ancient and modern DNA to show that the beaver population was heavily impacted by expanding human populations over thousands of years.
A global decline in killer whale numbers occurred approximately 40,000 years ago during the last Ice Age, with a bottleneck and loss of genetic diversity. The South African population remained genetically diverse, suggesting it escaped the bottleneck due to a stable Bengeula upwelling system.
The human Y chromosome contains unique genes that have likely been maintained by selection, suggesting it will stick around despite its small size. Genetic diversity on the Y chromosome is low, but researchers found that natural selection, particularly purifying selection, also contributed to this low diversity.
Caribou populations in climatically stable areas have the greatest genetic diversity, but climate change is expected to reduce viable habitat and lead to population isolation and fragmentation. As a result, caribou will lose the ability to adapt to change and become more vulnerable to extinction.
Researchers found that home plants excel over visitors due to regional adaptations, which involve tradeoffs in performance. Genetic analysis revealed that only 15 regions of the genome are involved in adaptation, challenging the long-held view that multiple genes fuel these traits.
A complete genomic analysis of sorghum reveals its potential for alternative uses beyond grain production. Researchers hope to apply the findings to other feedstocks like miscanthus and sugarcane, while improving drought-resistant lines for food and fuel applications.
Researchers have discovered that fungal sex can generate genetic diversity in organisms like Cryptococcus neoformans, enabling the creation of drug-resistant and virulent strains. This discovery sheds light on how pathogenic microbes evolve to cause diseases.
Researchers discovered unisexual reproduction in Cryptococcus neoformans, introducing genetic diversity and potentially driving disease outbreaks. Aneuploidy, a genetic change, led to beneficial, neutral, or detrimental changes in offspring fitness, including drug resistance and virulence.
A Duke University study reveals that shrinking sea ice cover in the North Atlantic is disproportionately affecting young harp seals, causing them to strand. The research found no link between genetic diversity and stranding rates, instead highlighting the impact of climate change on younger animals.
The study reveals high genetic diversity of Plasmodium vivax in the Americas, similar to Asia and Oceania, suggesting multiple introductions. This diversity has important implications for control and eradication efforts.
A comprehensive catalog of great ape genetic diversity has been created, elucidating the evolution and population histories of six great ape species. The resource will aid in current and future conservation efforts by preserving natural genetic diversity.
A team of NYU biologists found that a series of genes expressed in brain stem cells control the generation of neural diversity in the visual system of fruit flies. This process, known as a temporal cascade, ensures the sequential generation of different neural types.
Researchers tracked 80 commercial honey bee colonies over 10 months and found that those with queens who had mated at least seven times were 2.86 times more likely to survive. This suggests that genetic diversity is crucial for the survival of honey bee colonies.
A recent study published in Investigative Genetics found that the genomic diversity of the Dutch population follows a southeast-to-northwest gradient, with the population separated into four geographic groups. The researchers propose that this pattern is due to recent movement within the last 2000 years, rather than ancient events.
Scientists have sequenced and analyzed three lemur populations to guide conservation efforts, revealing significant genetic distance between northern and eastern aye-ayes. The study also compared human and lemur genetic diversity, suggesting the aye-ayes were separated for an extended period by geographic barriers.
Researchers from Basque Country describe two new species of Hydnum mushroom, Hydnum ovoideisporum and Hydnum vesterholtii, with distinct ovoid spores and ecological characteristics. The study confirms high genetic diversity among the genus, shedding light on their distribution and ecology.
A global research team has completed high-quality sequencing of 90 chickpea genomes, revealing clues on how to improve crop resilience. The study provides a map of the genes that define the chickpea plant, potentially leading to improved varieties with enhanced drought tolerance and disease resistance.
A study found that koalas have had low genetic diversity for over 120 years, likely caused by inbreeding due to declining populations. The species' vulnerability to diseases like Chlamydia and retroviruses is a major concern.
A genetic study has found that Sumatran orangutans have undergone a substantial recent population decline due to deforestation. However, the research also identified critical corridors for dispersal migrations that can help maintain genetic diversity and aid in the species' conservation if protected.
Researchers found that young male orangutans migrate across the island to increase breeding chances and preserve genetic diversity. The study suggests protecting mountainous regions with no viable populations to maintain genetic exchange and promote species survival.
Researchers found that plants in different regions produce distinct chemical defenses against aphids, which are influenced by local pest populations. This variation is driven by the need for optimal defense against specific aphid species, highlighting the importance of genetic diversity in plant evolution.
A novel genetic study led by CU-Boulder postdoctoral researcher Jessica Metcalf has clarified the native diversity and distribution of cutthroat trout in Colorado, revealing a single surviving population outside its native range. The study also confirmed the extinction of two previously unknown cutthroat strains, including one from the...
Researchers will use wild strawberry plants to identify the role of genetic diversity in polyploids, which make up 30-80% of all living plants. The project aims to predict ecological responses to environmental change and ensure sustainability of crops like strawberries, cherries, and apples.
A recent study found that Magellanic penguins' high genetic variation in the MHC genome region is maintained by balancing selection, which favors heterozygous individuals with increased fitness. The study tested whether mate choice or genetic selection based on disease exposure drives this diversity.
A study of 15 African hunter-gatherer genomes reveals over 13 million DNA variations, shedding light on human adaptation to specific pathogens and environmental factors. The research also identifies candidate genes for short stature in Pygmies and ancient interbreeding between modern Africans and another hominin lineage.
A new model suggests that frequency-dependent selection fosters genetic diversity by allowing different mutations to coexist and interact. This leads to higher diversity within populations, despite the potential decline in average fitness.
Research team studied genetic diversity of coelacanths in Africa, revealing low genetic diversity but specific patterns in certain regions. The study shows that coelacanths can continue to develop and adapt to new conditions despite their slow evolutionary rate.
A sweeping review of 20 years of research finds that biodiversity loss diminishes ecosystem services essential for human health and prosperity. Genetic diversity enhances crop yields, wood production, and fodder, while plant diversity increases resistance to invasive species and pathogens.
Maize's impressive genetic diversity was comprehensively characterized, revealing over 55 million SNPs across 103 inbred lines. The studies also found that SVs were associated with important agronomic traits and influenced genome size variations.
A team of international scientists has confirmed that the extinct Tasmanian Tiger had limited genetic diversity prior to its extinction. The study reveals that the thylacine's genetic health may have been affected by geographic isolation from mainland Australia approximately 10-13 thousand years ago.
A study of Afghan DNA reveals a shared genetic heritage with a common ancestral population emerging during the Neolithic revolution. The analysis indicates that early civilizations in the region contributed to the unique genetic diversity of Afghans, shaped by migrations and invasions.
Researchers used NEWGARDEN software to determine optimal founder placement and dispersal for maximum population growth and genetic diversity. The study found that planting trees 1,500 meters into a preserve can result in up to 247% more trees in 101 years' time.
A genetic survey of Antarctic blue whales found a surprisingly high level of diversity among the surviving population, which may help them slowly rebound from catastrophic decimation. The study tracked individual movements and revealed some whales traveled over 6,650 kilometers in four years.
Chimpanzee populations living in close proximity exhibit substantially more genetic diversity than humans on different continents. This study provides a valuable tool for chimpanzee conservation, enabling the identification of population origin and provenance.
A study published in PLOS Genetics reveals that chimpanzees living in close proximity are substantially more genetically different than humans from different continents. This finding highlights the importance of conserving each population independently to address habitat loss and hunting challenges.
A new study reveals a significant decline in the genetic diversity of alpine chipmunks in Yosemite National Park due to climate change. The species' geographic range has shifted to higher elevations over the past 90 years, resulting in fragmented and genetically impoverished populations.
The Collaborative Cross (CC) resource, a genetically diverse mouse model, will advance understanding of complex human diseases. Key findings highlight the CC's potential in identifying genes influencing various traits and human diseases.
The Collaborative Cross project in North Carolina has created a vast library of genetic material, mirroring human diversity in mice. This enables faster and more accurate understanding of genetic variation's impact on living systems, potentially leading to breakthroughs in treatment and prevention for human diseases.
Linguist Michael Cysouw disputes Quentin Atkinson's claim that the cradle of language is in southwest Africa, citing inconsistent results from comparative linguistics analysis. The study's findings suggest the site of language origin may be located in eastern Africa or the Caucasus, rather than supporting an 'Out-of-Africa' model.
Researchers found that MHC genes, which distinguish self from foreign proteins, undergo an 'arms race' with germs, favoring the retention of diverse genes. This diversity is crucial for mounting a defense against novel pathogens.
A study mapping sheep ancestry over 11,000 years reveals vast genetic diversity and adaptability to diverse environments. The research provides insights into the evolution of selective breeding for traits such as coat color and body size.
A recent study from University of Utah biologists found that the diversity of immune-system MHC genes is maintained through an 'arms race' between genes and germs, where pathogens evolve to evade the immune response, but also create new opportunities for other variants to emerge. This phenomenon helps explain why some disease-susceptib...
A study published in New Phytologist found that the entire Hawaiian population of Sphagnum palustre is a single clone, with genetic diversity comparable to that of sexually propagating populations. This surprising discovery suggests that vegetative propagation can lead to long-term evolutionary success.
Elena Litchman leads a $2 million NSF grant to study Lake Baikal's adaptation to climate change. The research aims to understand how the lake's endemic species will respond to rising temperatures and human-induced stress, with potential implications for global ecosystems.
A team of researchers has found an abundance of genetic diversity in ancient wild horses, contradicting the idea that modern male horses lack diversity due to intrinsic properties. The study suggests that domestication is the main reason for the low genetic diversity in modern stallions.
Research reveals Iberian lynx fossils have low genetic variation over the last 50,000 years, suggesting moderate population sizes may ensure long-term survival. This finding challenges the myth that certain species are doomed by their genetics.
A team led by Indiana University biologists has confirmed that modern sunflowers originated from the eastern United States, based on a comprehensive examination of genetic diversity. The researchers found no evidence to support the idea that sunflowers were domesticated independently in Mexico.
A recent study published in the journal Evolution proposes that sex may not promote genetic diversity as previously thought. Instead, its primary function is to maintain a species' genome context and prevent macroevolution, allowing for microevolution to occur.
Researchers use genome sequencing and analysis to identify individuals for captive breeding programs, aiming to maximize genetic diversity and prevent extinction. The study provides insights into the impact of European settlement on Tasmanian devil genomic diversity.
The Conservation Genetics Lab uses genetic techniques to identify inbred populations and introduce new genetic variation. They also apply this technique to endangered species in captive breeding programs and use DNA evidence to catch wildlife criminals.
Researchers identified rare genetic variations in children with autism spectrum disorders, including duplications and deletions of DNA regions. These findings suggest a diversity of genetic causes for the disease and highlight the importance of targeting specific subtypes of autism for effective treatment.
Researchers have created a genome-wide map of most inbred mouse strains, finding that they represent only limited genetic diversity. The team hopes to expand this diversity by adding wild mouse populations, which could lead to more effective translation of experimental results to humans.
Two species of gorillas diverged 17,800 years ago during the Pleistocene era, with climate change causing intermittent interbreeding and population separation. The critically endangered Cross River gorilla population has lost 60% of its genetic diversity in 320 years due to anthropogenic pressure.
Researchers found that sewage discharge and urban runoff from coastal areas are affecting the genetic structure of sea stars, limiting their dispersal and decreasing genetic diversity. This study highlights the impact of human activities on marine ecosystems, suggesting a need for more effective management strategies.
Researchers show strong links between South China Sea, West Pacific, and Coral Triangle preserve diversity and resilience of coral reefs. The region's natural resources are closely interconnected, highlighting the need for collective action to protect them.
Researchers used acoustic analysis and genetic diversity to identify gibbons from their regional accents, showing a high degree of similarity between species within the same location. The study suggests that gibbon songs are adapted to forest environments, with distinct patterns in each region.
A team of scientists has mapped the genome of orangutans, providing a new tool for conservation efforts and shedding light on the evolution of primates. The study reveals unique features of the orangutan genome, including fast-evolving genes related to visual perception and metabolic processes.
A large-scale study has found major declines in US bumble bee populations, with four species experiencing a 96% drop in relative abundance and a 23-87% loss of geographic range. The researchers attributed the decline to low genetic diversity, high infection rates with the parasite pathogen, and climate change.
African savanna and forest elephants are two separate species, differing in size and genetic diversity. The study used DNA analysis to prove their separation over millions of years, with implications for conservation efforts.
A consortium of researchers has designed an early phase safety trial to assess mosaic vaccines in humans. The trial aims to test the mosaic concept and potentially lead to the next generation of HIV vaccine candidates.