Articles tagged with Genetic Diversity
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.
The genetic study confirms Antillean manatees in Belize as a separate subspecies from Florida manatees. However, the Belizean population has extremely low genetic diversity, posing a long-term viability threat.
A recent study by Professor Sir Alec Jeffreys and his team at the University of Leicester has identified a key gene, PRDM9, that plays a significant role in shaping human diversity. The research reveals that people with different versions of PRDM9 exhibit distinct recombination behaviors, contributing to genetic disorders.
A University of East Anglia study found that female birds in the Seychelles warbler species prefer extra-pair fertilizations, which increase genetic diversity and disease resistance in offspring. This results in longer lifespan for those individuals.
Rapid losses of African native livestock threaten the continent's food supply as investments are needed to preserve unique traits and prevent extinction. Experts urge urgent action to stop the loss of genetic diversity, particularly in West Africa, where drought- and disease-resistant animals are under siege.
The Ensembl project has successfully catalogued the genetic diversity of over 50 species, including the zebra finch. The genomic annotation system enabled researchers to identify genes expressed in the zebra finch brain responsible for vocalising messages.
A unique St. John's wort collection curated by ARS scientists provides university collaborators with genetically diverse sources of the herb to study its medicinal potential. Researchers are screening the collection for biologically active compounds that may combat viral infections, reduce inflammation, or improve digestive health.
Researchers analyzed over 900 dogs and 200 wild gray wolves worldwide, finding that modern dogs share more genetic similarity with Middle Eastern gray wolves than other wolf populations. The study's findings contradict previous research suggesting an East Asian origin for dogs.
Researchers at the University of Leicester are investigating the ancestry of saffron-producing crocus flowers to improve crop sustainability and quality. By analyzing genetic diversity, they aim to recreate rare varieties using wild plant crosses.
Research by Washington University in St. Louis shows that Thai hill farmers' traditional agriculture, including seed selection and exchange, influences the genetic diversity of their ancestral rice varieties. These local landraces provide a pool of traits that can improve crops worldwide.
Researchers have found that male and female mosquitoes harmonize with each other to find a compatible mate. The study reveals that different mosquito forms can travel together despite their genetic diversity, which has significant implications for malaria control.
Research published in PLoS Biology discovered the adaptation of African cichlid fish visual sensitivity to ecological factors such as diet and water clarity. The study showed that both changes in gene expression and sequence contribute to organismal diversity, with complementary effects.
A University of Michigan research team analyzed 47 embryonic stem cell lines and found they lacked genetic diversity, with most derived from northern and western European ancestry. The lack of diversity raises concerns about unequal access to therapies for certain groups.
The study found that European plant communities are becoming more homogeneous, with rare species becoming extinct and phylogenetic diversity decreasing. This loss of uniqueness makes it harder for biological communities to adapt to environmental changes.
Researchers analyze genetic diversity of 280 individuals from Armenia and Georgia, comparing with results from Russia and Turkey. They establish a core collection of 27 trees capturing 93% of alleles, making M. orientalis more accessible for breeding and research communities.
Researchers found that male birds' songs with higher pitches are associated with greater genetic diversity, making them more attractive mates. The study suggests that females can pick up on the pitch of males' songs to decide which birds will make the best mates.
A comprehensive study on water vole genetics has been conducted by scientists from the University of Granada and Doñana Biological Station. The research reveals essential information for developing successful conservation plans, which will help preserve the genetic diversity of this endangered species.
Researchers have discovered genetic clues that enable scientists to tailor corn plants for specific traits, such as high protein content for human consumption or high glucose content for biomass fuel. The findings could lead to higher yield or improved quality crops with reduced environmental impact.
Researchers have developed a new mouse variety that approximates human genetic diversity, allowing for more accurate testing of chemotherapeutic drugs. The study aims to reduce the risk of adverse reactions and improve treatment outcomes for cancer patients.
Researchers found no support for theory that female choice is connected to 'good genes', suggesting females resist mating attempts primarily for their own benefit. Females with increased ability to reject males had higher fitness, while inadvertent selection for male persistence played a minor role.
Researchers explored how gene flow between cultivated sorghum and its weedy relatives impacts crop yields and diversity. Farmers in northern Cameroon actively limit gene flow through practices like eradicating weeds, but some unintentional practices still favor genetic exchange.
A $5.2 million NIH grant will fund detailed genotyping of thousands of adults in Samoa to investigate genetic variation associated with obesity, diabetes and cardiovascular disease. The study aims to identify specific 'susceptibility' genes that may increase the risk of these conditions.
A recent study by University of Oklahoma's Cecil Lewis explores genetic ancestry influences on health and population genetics. The research finds that eastern South America has more genetic diversity than previously expected, contradicting the widely accepted peopling timeline.
Genetic analysis reveals African village dogs have directly descended from indigenous dogs, with higher genetic diversity than modern breeds. This challenges the claim that dogs were first domesticated in East Asia.
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 global research team analyzed the genomes of twenty genetically diverse rice types to identify favorable traits and their DNA variations. This breakthrough enables breeders to develop new and improved rice varieties more effectively, particularly in addressing climate change impacts.
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 uncover evidence that chiles were independently domesticated multiple times from geographically distant wild progenitors, resulting in unique gene pools and important reservoirs of genetic diversity. Domesticated individuals exhibit reduced genetic diversity compared to semiwild populations.
Global Crop Diversity Trust awards grants to explore millions of seed samples worldwide in search of drought, heat tolerance and other critical traits. The effort aims to support farmers in developing countries by increasing crop production amidst climate change.
The study reveals startling diversity in Africa, shared ancestry among geographically diverse groups, and traces the origins of Africans and African Americans. The research team mapped ancient migrations and determined that modern humans exited Africa near the middle of the Red Sea.
A recent study in Crop Science proposes data-driven methods to group breeding programs compatible for germplasm exchange. The researchers identified three mega-targets of selection among barley breeding programs, which could produce adapted genotypes with high yields.
Researchers developed a new strategy to identify areas within hotspots where they should focus their time, effort and money. They used multiple species and past climate models to estimate the species' past distributions, pinpointing regions that have been climatically stable and likely to harbor diversity.
Researchers found shade coffee farms support widespread dispersal of native trees, preserving genetic diversity and sheltering native wildlife. The study highlights the ecological benefits of traditional agriculture in promoting biodiversity and connecting habitat patches.
Research reveals high Sephardic Jewish ancestry in Iberian populations, suggesting significant religious conversion events. Low diversity in North African lineage indicates recent arrival after 711 AD conquest.
New research on Galapagos land iguanas reveals reduced genetic diversity in some populations, putting them at risk from future environmental changes. The study's findings highlight the need for effective management and conservation strategies to ensure the long-term survival of these unique reptiles.
A recent study by Purdue University researchers found that commercial chicken breeds have lost up to 90% of their native genetic diversity, leaving them vulnerable to new diseases. Interbreeding with native or non-commercial bird species may help restore genetic diversity and improve disease resistance.
Researchers studied the 'living fossil' tree species Symphonia globulifera, which contains genetic imprints of rain forests under climate change. The study reveals patterns in genetic diversity that suggest tropical forests responded differently to past climate conditions, with some populations persisting despite forest changes.
New research suggests rare corals can cross-breed with other species to increase genetic diversity and adapt to changing conditions. This finding has raised hopes for the ability of corals to withstand the impacts of climate change.
Researchers found that polygyny leads to an excess of genetic diversity on the X chromosome compared to autosomes. The process also results in fewer unique male genes being passed into the next generation.
A University of Michigan analysis shows that captive breeding colonies are too small to protect the critically endangered Asian vulture from extinction. Adding wild birds to the captive colonies is crucial but hampered by political and logistical barriers.
Researchers have discovered that the diversity of parasitic wasps is even higher than initially suspected, with 313 provisional species identified through a combination of ecological and genetic data. The new analysis sheds light on a group of insects that are already known for their staggering diversity, with estimates suggesting that...
A large genetic study of the extinct woolly mammoth has revealed that it did not have much genetic diversity and was split into two groups. The discovery rules out human hunting as a contributing factor to its extinction, instead pointing to climate change and disease.
A recent PNAS study reveals that temperature drives biodiversity in tropical regions, contradicting previous assumptions that light was the key factor. The study found that bacterial samples from warm waters contained many species, suggesting that photosynthesis has little influence on diversity.
An invasive population of the freshwater snail Melanoides tuberculata shows a tremendous amount of genetic variation for key life-history traits, allowing for large potential for evolutionary change. This diversity can arise from multiple invasions and amplification through sexual reproduction.
A comprehensive genetic study of Pacific Islanders has found that Polynesians and Micronesians have almost no genetic relation to Melanesians. Instead, they share a strong genetic connection with Taiwan Aborigines and East Asians, suggesting a rapid migration through Island Melanesia with minimal intermingling.
Scientists confirm tropical regions as key to global biodiversity, with a group of shellfish defying conventional patterns. Contrary to expectations, the Anomalodesmata group shows peak diversity in mid-latitudes, contradicting standard patterns.
A new UC Davis study explores how competition among genetically varied plants relates to species diversity, finding that diversity within a species is necessary for maintaining diversity among species. The research also highlights the importance of preserving biodiversity in plant communities.
A study by Cornell scientists found that genetically diverse honeybee colonies produced 30% more comb, stored 39% more food, and maintained foraging levels 27-78% higher than genetically uniform colonies. These colonies also gained weight due to sophisticated communication mechanisms like waggle dancing.
Researchers report that much of Tahiti's original genetic diversity still exists in remnant populations, offering a glimmer of hope for conservation efforts. The study suggests that targeted measures may preserve a representative fraction of the island's endemic tree snail genetic diversity.
Researchers found a correlation between horn growth and genetic diversity in alpine ibex, with greater diversity associated with longer horn lengths. The study suggests that genetic quality becomes more apparent as the animal ages, supporting the mutation accumulation theory of ageing.
The wild tiger's population has declined by 41% over the past decade due to habitat loss and trade in tiger parts. Successful conservation programs, such as those in India and Nepal, have shown promise in protecting the species.
Researchers developed an efficient algorithm to create vaccines that can combat the genetic diversity of HIV-1. The algorithm captures immunogens for both the Nef and Gag proteins, reflecting high-frequency viral strains and their mutations.