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Same fungus, different strains

Researchers analyzed genome sequences of two Aspergillus niger strains to improve biofuel production. They found unique genes in each strain that contribute to their characteristics, including high citric acid yields and efficient enzyme production.

SourceDOE/Joint Genome Institute·JournalGenome Research·DateMay 13, 2011

Eucalyptus tree genome deciphered

The Eucalyptus grandis genome sequence provides a blueprint for efficient breeding programs, disease resistance, and wood quality improvement. Researchers aim to replace fossil fuels with biofuels and other alternative energy sources using cellulose-rich plants like eucalyptus trees.

USDA researchers, collaborators sequence genomes of fungi that threaten wheat, poplars

The study's genome-wide characterization of rust fungi may help develop control strategies for worldwide threats to wheat fields and tree plantations. Researchers uncovered evidence that both pathogens have large numbers of effector proteins, indicating co-evolution with host plants.

SourceUnited States Department of Agriculture - Research, Education and Economics·JournalProceedings of the National Academy of Sciences·DateMay 9, 2011

From a bucket of seawater, new understanding of the ocean

Researchers have discovered a new way to understand the interactions between cells and their environment using single-cell marine organisms. By sequencing the genomes of these tiny microbes, scientists can gain insights into diverse questions such as cancer cell growth rates and the impact of climate change on ecosystems.

SourceRutgers University·JournalScience·DateMay 6, 2011

Succulent plants waited for cool, dry Earth to make their mark

Researchers propose that a prolonged dry spell and lower atmospheric carbon dioxide levels drove the rise of cacti and other succulents, leading to rapid speciation between 5-10 million years ago. This coincided with species explosions in other plant groups, including C4 grasses, which burst onto the scene during the same time period.

SourceBrown University·JournalProceedings of the National Academy of Sciences·DateMay 3, 2011

Evolution can cause a rapid reduction in genome size

Researchers have decoded the entire genome of lyre-leaved rock cress, a close relative of the thale cress, revealing that its genome is significantly larger. The study found that considerable elements were lost from the thale cress genome, with hundreds of thousands of small deletions accounting for most of the differences in size.

SourceMax-Planck-Gesellschaft·JournalNature Genetics·DateApr 21, 2011

Study provides new way to classify E. coli bacteria and test for fecal contamination

Researchers identified nine environmental E. coli strains indistinguishable from typical E. coli but potentially not representative of true environmental hazards. The findings suggest the need for a new culture-independent, genome-based coliform test to accurately detect non-hazardous environmental types of E. coli.

SourceGeorgia Institute of Technology·JournalProceedings of the National Academy of Sciences·DateApr 11, 2011

Where did flowers come from?

Researchers are studying the unique species Amborella to learn about the evolution of flowers and their characteristics, such as drought resistance and fruit maturity. The team hopes to gain insights into how flowers diversified over time and how they respond to global warming.

Seeking social genes

A recent study sequenced the genome of a red harvester ant and found significant differences in genes related to sense of smell, chemical signal detection, and immune system. These findings suggest that epigenetic modifications play a crucial role in regulating gene expression for division of labor and reproduction.

SourceU.S. National Science Foundation·JournalProceedings of the National Academy of Sciences·DateFeb 1, 2011

Genetic archaeology finds parts of our genome more closely related to orangutans than chimps

A recent study published in Genome Research found that certain regions of the human genome are more similar to those of orangutans than chimpanzees, contrary to previous assumptions. This suggests that humans and orangutans shared a common ancestor with high genetic diversity, while chimpanzees may have experienced a genetic bottleneck.

SourceCold Spring Harbor Laboratory·JournalGenome Research·DateJan 26, 2011

Gene hunters tackle crop diseases

Scientists have sequenced the genomes of parasitic water fungus and water molds that cause late blight in potatoes, tomatoes, and downy mildew in cruciferous vegetables. The analysis reveals that some sections of the genome are slow to evolve, allowing for resistance genes to be targeted.

SourceNorwich BioScience Institutes·JournalScience·DateDec 9, 2010

Physicists use graphene to decode DNA

Researchers are using graphene to develop a new method for decoding DNA sequences, which could lead to more precise medical treatments. The technique involves passing DNA through a nanopore drilled into graphene, allowing scientists to read out the chemical bases along the strand as they pass through.

SourceIOP Publishing·JournalPhysics World·DateDec 1, 2010

Being more realistic about the public health impact of genomic medicine

Researchers argue that genomic risk prediction for population-level preventive healthcare is not yet supported by evidence. A cost-effective approach would require interventions for those at risk, but such an approach has yet to be demonstrated. The authors caution against widescale implementation of genetic screening for disease risk.

SourcePLOS·JournalPLOS Medicine·DateOct 12, 2010

Long-extinct passenger pigeon finds a place in the family tree

Researchers used DNA from century-old specimens to identify the passenger pigeon's closest living relatives, revealing a unique bird with a distinct place in the evolutionary history of pigeons and doves. The study found that the passenger pigeon was not closely related to the mourning dove as previously thought.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalMolecular Phylogenetics and Evolution·DateOct 6, 2010