2 Y Genes Can Replace the Entire Y Chromosome for Assisted Reproduction in Mice
Published: November 21, 2013.
Released by University of Hawaii at Manoa
The Y chromosome is a symbol of maleness, present only in males and encoding genes important for male reproduction. But live mouse offspring can be generated with assisted reproduction using germ cells from males with the Y chromosome contribution limited to only two genes: the testis determinant factor Sry and the spermatogonial proliferation factor Eif2s3y.
Full Story »
More news from University of Hawaii at Manoa
Protecting Diversity on Coral Reefs: DNA May Hold the Key
Coral reefs are widely known for their stunning array of color, shape and forms of life, making them a model for extreme biodiversity. Hidden within the multitude of reef inhabitants, but no less important, is their genetic diversity-- variability in DNA that gives species the capacity for adaptation, speciation and resilience in the face of stress. Research published today by a team of scientists from the University of Hawai'i at Mānoa (UHM) School of Ocean and Earth Science and Technology, the University of
Coral 'Toolkit' Allows Floating Larvae to Transform into Reef Skeletons
In a study published today, researchers from the University of Hawai'i at Mānoa (UHM), Rutgers University, and the University of Haifa identified key and novel components of the molecular "toolkit" that allow corals to build their skeletons (called biomineralization) and described when -- in the transformation from floating larvae to coral skeleton -- these components are used.
New Imaging Technique Reveals Vulnerability of Coral Reefs
Corals, the primary reef builders on coral reefs, are often the star player in research studies addressing the impacts of climate change on coral reefs because they are the foundation of coral reef ecosystems. However, the breakdown of coral reefs from borers (such as bivalves, sponges, and marine worms) and grazers (such as parrotfish and urchins) -- called bioerosion -- and growth from encrusting algae and invertebrates (for example, oysters and barnacles) - called secondary accretion -- are critical processes for reef sustainability.
Human Carbon Release Rate Is Unprecedented in the Past 66 Million Years of Earth's History
The earliest instrumental records of Earth's climate, as measured by thermometers and other tools, start in the 1850s. To look further back in time, scientists investigate air bubbles trapped in ice cores, which expands the window to less than a million years. But to study Earth's history over tens to hundreds of millions of years, researchers examine the chemical and biological signatures of deep sea sediment archives.
Research Explains Near-island Biological Hotspots in Barren Ocean Basins
Coral reef islands and atolls in the Pacific are predominantly surrounded by vast areas of ocean that have very low nutrient levels and low ecological production. However, the ecosystems near these islands and atolls are often extremely productive and support an enhanced nearshore food-web, leading to an abundance of species and increased local fisheries. An international team of scientists from the National Oceanic and Atmospheric Administration (NOAA), University of Hawaii - Manoa (UHM), National Geographic Society, Scripps Institution of Oceanography, and Bangor University
New Experiments Determine Effective Treatments for Box Jelly Stings
Researchers at the University of Hawai'i - Mānoa (UHM) developed an array of highly innovative experiments to allow scientists to safely test first-aid measures used for box jellyfish stings - from folk tales, like urine, to state-of-the-art technologies developed for the military. The power of this new array approach, published this week in the journal Toxins, is in its ability to rigorously assess the effectiveness of various treatments on inhibiting tentacle firing and venom toxicity - two aspects of a sting that affect
Beneficial Bacteria in Hawaiian Squid Attracted to Fatty Acids
The small but charismatic Hawaiian bobtail squid is known for its predator-fooling light organ. To survive, the nocturnal cephalopod depends on a mutually beneficial relationship with the luminescent bacterium, Vibrio fischeri, which gives it the ability to mimic moonlight on the surface of the ocean, and deceive monk seals and other predators that would happily make a meal of the small creature.
New Research Shows La Niña Is Not Helping Hawai'i's Rainfall And Groundwater
Historically when El Niño events occur, Hawai'i has experienced nearly six months of drought, from November to April. Conversely, during La Niña events rainfall has been greater than normal - building up Hawai'i's groundwater supply. New research published this month in the Journal of Climate by scientists at the University of Hawai'i - Mānoa, Nanjing University of Information Science and Technology, and NOAA's Honolulu National Weather Service (NWS) Office, determined that the relationship between La Niña and rainfall in Hawai'i has changed and