Category Archives: Genome

Scientists hail advance in decoding barley genome

Posted: November 4, 2012 at 5:42 am

WASHINGTON, D.C. In a major advance that will unlock the benefits of the mapping of the barley genome one of the world's most important cereal crops work conducted and supported by the U.S. Department of Agriculture (USDA) in collaboration with researchers around the world has resulted in the most advanced sequencing of the barley genome to date, as reported in the journal Nature.

The advance will give researchers the tools to produce higher yields, improve pest and disease resistance, and enhance nutritional value of barley. Past genomic research supported by the USDA has provided similar benefits to crops such as tomato and corn, and helped improve cattle breeding and enhance the productivity of dairy cows.

USDA supports innovative genomics research that is really moving us forward to meeting the many challenges we face in food, fuel and agriculture production, said Catherine Woteki, USDAs chief scientist and undersecretary for research, education, and economics. This important step toward full barley genome sequencing offers enormous potential for global food security."

Project investigators Timothy Close and Stefano Lonardi at the University of California, Riverside (UCR) and Gary Muehlbauer at the University of Minnesota joined USDA Agricultural Research Service scientists Roger Wise and Jesse Poland and scientists from 19 other organizations around the world to make up the International Barley Sequencing Consortium (IBSC).

Almost twice as large as the human or maize genomes, the barley genome was a challenge to sequence because of its complexity and large proportion of repetitive regions that are difficult to piece together into a true linear order. By developing and applying a series of innovative strategies that allowed them to circumvent these difficulties, the IBSC created a high-resolution assembly that places the majority of barley genes in order. This new resource provides the sequences of almost all genes and associated regulatory regions, which will offer new direction to researchers seeking to improve barley yield and quality through genomics-assisted breeding.

The work of IBSC highlighted in Nature provides a detailed overview of the functional portions of the barley genome, revealing the order and structure of most of its 32,000 genes and a detailed analysis of where and when genes are switched on in different tissues and at different stages of development. They describe the location of dynamic regions of the genome that carry genes conferring resistance to devastating diseases such as powdery mildew, Fusarium head blight and rusts. This will provide a far better understanding of the crops immune system. The achievement also will highlight with unprecedented detail the genetic differences among barley cultivars.

The success of the barley genome sequencing, and other grass-family crops including wheat and rye, will allow breeders and scientists to address the challenge of feeding the worlds growing population living in an environment that increasingly challenges farmers and ranchers with extreme weather events.

Originally posted here:
Scientists hail advance in decoding barley genome