Articles tagged with Hybrid Genes
A Stanford-led study found that pollution is causing fish hybrids to form in a Mexican river, threatening species diversity. The researchers analyzed water and fish samples from four rivers and found that those with higher levels of chemicals and heavy metals had more hybridized swordtail fish.
A new apomixis system termed Fix4 achieves stable and heritable clonal seeds with normal seed-setting rates, overcoming the limitations of previous genome editing systems. This innovation has significant implications for accelerating the application of apomixis technology in hybrid rice production.
Scientists have identified a brain molecule called NEAT1 that appears to play a central role in triggering light sensitivity (photophobia) during migraines. By disrupting the normal balance of nerve signaling and pain regulation, NEAT1 makes nerves more sensitive to light.
Hybrids between two manakin species in Panama have remained relatively stable over the past 30 years, with minimal changes in genomic markers. The phenotypic transition zone also shows stability, with only one trait having shifted location, suggesting a potential selection for green bellies.
Threespine stickleback fish evolved resistance to freshwater tapeworms by forming scar tissue around them, which prevents the worms from growing. However, this defense has a significant fitness cost for female sticklebacks, as they are 80% less likely to successfully breed due to the accumulated scarring.
The Sixty-third Supplement to the Check-list of North American Birds updates bird classifications, including meadowlark species splits, hummingbird recognitions, kite separations, and the addition of a giant-petrel. New subspecies are also recognized for some bird species, reflecting advances in genetic analysis.
Researchers identified glacial refugia for Campanula americana and found that populations nearest the refugia had highest potential for speciation. This discovery highlights the importance of conserving habitats in Southeastern regions.
Researchers have developed a direct method for generating complex structured light through intracavity nonlinear frequency conversion. This technique uses transverse mode locking to produce vortex beams, which are then converted into second-harmonic generation beams with distinct structural characteristics. The study demonstrates the p...
Research on hybrid threespine stickleback fish found that genetic signatures of hybrid incompatibilities are environment-dependent. Fish raised in ponds had a lower incidence of mismatched genes due to ecological pressures, whereas lab-reared fish showed no difference in heterozygosity.
Researchers identify DNA-RNA hybrids as a key factor in ALS progression, leading to increased genomic damage and genetic instability. This breakthrough opens new avenues for understanding the disease's molecular basis and developing therapies to slow its evolution.
The UAP56/DDX39B protein removes DNA-RNA hybrids from the genome, ensuring correct gene expression and genomic integrity. Researchers at the University of Seville discovered this key function, highlighting the protein's importance in maintaining genome stability.
Scientists have identified two genes responsible for a melanoma that develops near the tails of male highland-sheepshead hybrids. These findings provide insight into the genetic causes of hybrid dysfunction and its effects on disease, highlighting the importance of understanding gene interactions in different species.
A recent study by Uppsala University and Princeton University found that gene flow between closely related species of Darwin's finches has affected their beak morphology. The researchers observed a convergence in beak shape among hybrids, which they attributed to gene flow from the medium ground finch to the common cactus finch.
Magnetoacoustic waves have been directly observed and found to travel long distances with larger amplitudes than expected. The findings open up new avenues for manipulation of these waves at room temperature, making them suitable for carrying information or driving small motors.
A corn gene identified from a 118-year-old experiment at the University of Illinois can boost yields by an average of 4.6 bushels per acre, requiring no additional fertilizer inputs. The gene, NAC7, controls senescence and stays green longer, allowing plants to continue photosynthesizing and producing grain.
Scientists studying Leishmania parasites found that they can mate to produce hybrid offspring carrying genetic material from multiple strains, suggesting a true sexual reproductive cycle. This discovery could lead to improved treatment for deadly Leishmaniasis infections.
A study by LMU biologists reveals that the distinct division between Europe's carrion crows and hooded crows is largely driven by plumage color. The two forms have remained distinct despite fertile hybrid offspring, suggesting a selective advantage for mate choice based on feather color.
Researchers in the University of Helsinki have confirmed a fossilized seal hybrid between grey and ringed seals, with genetic analysis suggesting possible interbreeding in the wild. The discovery provides insights into hybridization between mammalian species, including early humans.
Researchers at NICT Space-Time Standards Laboratory demonstrate a novel time scale generation method combining an optical lattice clock with a hydrogen maser. The resultant signal continued for half a year without interruption, outperforming Coordinated Universal Time (UTC) and TT(BIPM) in terms of accuracy.
Researchers sequenced the first Amazon molly genome, revealing insights into its asexual reproduction and surprising genetic diversity. The study found evidence of hybrid vigor and high immune system variability in the clones, contradicting the expectation that asexuals would be at a disadvantage.
Swedish researchers study hybridization of Italian sparrows from Crete, Corsica, Sicily and Malta, finding independent events between house sparrow and Spanish sparrow. The populations have distinct genetic compositions due to limitations on genetic combinations, with certain genes always inherited from the house sparrow.
Researchers found that hybrid offspring have significantly more active genes than their parent plants, leading to increased yield. This discovery may help breeders create even more productive maize varieties in the long term.
The African and Western clawed frog hybrid crossbreeding reveals that a duplication of chromosomes can occur, allowing viable offspring. However, some hybrids are not viable due to dysfunctional separation of paternal chromosomes, leading to the death of early-stage embryos.
Researchers have identified regions of the genome contributing to resistance against western corn rootworm, with ascorbate biosynthesis and nematode-attracting compounds implicated in the process. The study's findings offer hope for developing native resistance mechanisms into elite hybrids without using transgenics.
Researchers from the University of Seville have discovered that genes located near nuclear pores contribute to maintaining genome stability. The study found that anchoring DNA to the pore during transcription prevents DNA-RNA hybrids, a natural source of genome instability.
Australian researchers have identified a gene that allows for cross-pollination in wheat, enabling the production of high-yielding hybrid wheats. This breakthrough could help meet the increased food demand predicted by 2050 and improve yield stability in challenging growing regions.
Researchers at Washington State University have created a perennial grain species, Salish Blue, which combines wheat and wheatgrass. This new crop has the potential to improve soil health, reduce waste, and provide sustainable food options for the Pacific Northwest.
A team of researchers discovered that maintaining DNA methylation is closely linked to hybrid vigor in Arabidopsis thaliana, a model plant for studying hybrid plant superiority. The study's findings suggest that epigenetic regulation plays a crucial role in hybrid vigor.
A set of all-female hybrid greenling fish has boosted its long-term survivability by switching from one mating species to another. This 'host switch' occurred approximately 2,000 to 20,000 years ago and is thought to be a reason for the hybrids' extended survival.
Researchers Meyer and Shankar develop an analytical model to calculate the optimal price for hybrid bundles, considering factors such as element quality, cost, and scalability. The study finds that retailers can increase profits by pricing services higher when they are less scalable than goods.
Researchers at the University of Illinois identified clusters of genes that are associated with yield under crowding stress in sweet corn, finding that high-yielding hybrids utilize gene activities more directly related to carbohydrate accumulation. The study also found a common genetic basis for the yield response in six tested hybrids.
Scientists have successfully reproduced hybrid plants using natural cloning methods, allowing them to retain increased efficiency across multiple generations. This breakthrough could provide more affordable and productive crop options for small-scale farmers in developing countries.
A University of Utah-led study identified a long-sought 'hybrid inviability gene' responsible for dead or infertile offspring when two fruit fly species mate. The discovery sheds light on the genetic and molecular process leading to formation of new species, and may provide clues to how cancer develops.
Researchers investigate why only 14 percent of woodrat hybrids have genetic signatures from both desert and Bryant's woodrats. Habitat differences and mating conflicts are found to be key factors limiting hybridization in closely-related species.
Researchers identify a missing hybrid incompatibility gene in Drosophila melanogaster and D. simulans, shedding light on speciation mechanisms. The discovery paves the way for further studies on the biological pathways disrupted in hybrid offspring.
Scientists have identified a genetic mechanism to increase crop yields by tweaking a 'hybrid vigor' gene in plants. By understanding how this gene affects flowering time and fruit production, researchers may be able to develop new strategies to improve agricultural productivity.
Significant declines in European corn borer populations suggest that expensive, insecticidal toxin-resistant corn hybrids are not needed. Non-Bt hybrid seeds can be a more cost-effective option for growers to reduce potential losses.
A new study reveals that protein imbalances, rather than sequence differences, play a crucial role in mediating reproductive isolation between closely related species. The Lmr and Hmr genes, which form a Dobzhansky-Muller gene pair, are responsible for this phenomenon.
Researchers at the University of Bonn have decoded a possible mechanism for hybrid corn's high yield, finding that more genes are active in hybrid plants than in their homozygous parental lines. This increase in gene activity could lead to increased growth and vigor in hybrids.
Researchers have identified three genes responsible for hybrid sterility in rice, controlling fertility in indica-japonica hybrids by targeting female gametes and stabilizing cell membranes. The study may lead to the development of non-lethal hybrid combinations, improving crop genetics.
Scientists have discovered a new plant species in Scotland that has overcome infertility and formed a new hybrid. This rare example reveals the process of polyploidization, allowing the plant to restore fertility and thrive in the wild.
Researchers engineered a hybrid gene that recognizes and destroys Xylella fastidiosa bacteria, reducing leaf scorching and xylem clogging in grapevines. This breakthrough could lead to significant resistance against Pierce's disease, which has already destroyed thousands of acres of California vineyards.
Researchers have found genetic evidence suggesting that the Galapagos giant tortoise species Chelonoidis elephantopus may still exist in the wild, despite being thought extinct for over 150 years. The discovery was made by tracking the DNA of hybrid offspring between this species and another, C. becki, on Isabela Island.
Researchers studied the genome of Arabidopsis suecica, a hybrid species formed tens of thousands of years ago, to understand how genes are sorted and eliminated. The findings suggest that genes from one parent are preferentially expressed over the other, leading to the deletion of unfavored genes.
Wildflowers with distinct colors prevent hybrid offspring from reproducing, ensuring the species remains pure. Researchers have identified a genetic change linked to flower color, demonstrating reinforcement in plants.
Researchers have re-sequenced six elite corn varieties, discovering over 100 genes that are present in some but not others. This presence/absence variation could be crucial to understanding heterosis and producing better hybrids.
Researchers at Iowa State University have developed a new type of hybrid protein that can make precise double-strand DNA breaks in living cells. This breakthrough could lead to more efficient gene replacement and editing therapies, enabling modifications to plant, animal, and human genomes.
Researchers at Hebrew University and CSHL found a single gene that boosts yield and improves taste in hybrid tomato plants, working across various environmental conditions. The discovery has potential to transform the billion-dollar tomato industry and agricultural practices.
Researchers have discovered a single gene responsible for increased yield and improved sweetness in hybrid tomato plants. The gene, called florigen, produces a protein that regulates flowering and fruit production, leading to higher yields and sweeter fruits.
Researchers analyzed DNA sequences from two inbred corn strains and discovered significant differences, including the presence of unique stretches of genetic material. This diversity is believed to be behind hybrid vigor, which can improve crop traits such as protein content or biomass production.
Graduate student Scott Egan and his adviser Daniel Funk found that maple and willow leaf beetles diverging into two new species due to ecological habits promoting speciation. The study shows hybrids' lower fitness reduces genetic exchange opportunities between beetle types, pushing groups toward distinct species.
A RAND Corporation study finds that advanced diesel technology outperforms hybrid technology, which in turn beats gasoline-powered cars. Diesel vehicles provide larger savings for consumers and society, while hybrids offer moderate-to-small benefits.
Researchers find that mis-regulated immune systems can establish reproductive barriers in plants, leading to hybrid necrosis. This phenomenon challenges the classical definition of a species and suggests that speciation may be a gradual process.
A study found that a mis-regulated plant immune system can establish reproductive barriers, potentially leading to speciation. Researchers discovered that hybrid necrosis, a syndrome affecting unfit hybrids, is caused by a common group of genes being more strongly or weakly active in the hybrids than in their parents.
Scientists identify rapid evolution of plant defense genes as a cause of hybrid incompatibility, leading to sterility and defective offspring. This phenomenon may contribute to the formation of new species through gradual genetic incompatibilities.
Researchers at Yale University have identified a tortoise with half its genes in common with Lonesome George, the famous Galápagos tortoise. The discovery raises hopes for a conservation success story and potentially sets up a captive breeding program to recover the species.
Researchers have discovered a genetically pure Pinta tortoise, potentially leading to species recovery for the endangered giant Galápagos tortoise. The findings offer hope that Lonesome George's legacy can be transformed from an enduring symbol of rarity into a conservation success story.
Researchers at the University of Southern California have identified approximately 350 genes influencing oyster growth rate, revealing new insights into hybrid vigor. This discovery has implications for efficient and sustainable domestication of oysters and other ocean species.
Researchers identified two genes from different fruit fly species that interfere with each other, preventing male offspring production. This finding supports the Dobzhansky-Muller model, which suggests hybrid incompatibilities are caused by diverged genes from a common ancestor.
Researchers have identified a novel genetic change causing aHUS, a chronic disease that causes kidney failure and can be inherited. The mutation affects the factor H protein, which is crucial for controlling the complement system, and may lead to poor transplant outcomes.