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Sequencing of sorghum genome completed
Date:1/28/2009

NEW BRUNSWICK, N.J. In a paper published in the journal Nature this week, Rutgers researchers Joachim Messing, Rmy Bruggmann, and a team of international collaborators have described the genome of sorghum, a drought-tolerant African grass. The findings could one day help researchers to produce better food crops for arid regions with rapidly expanding human populations, such as West Africa.

Messing, director of the Waksman Institute of Microbiology at Rutgers, The State University of New Jersey, has been deeply involved in both the rice genome and maize (corn) genome sequencing projects. In 1982, he developed the modified shotgun sequencing approach used in the sorghum sequencing that represents a significant advance in methodology.

This approach takes into account the highly repetitive nature of large genomes including many plant species and the human genome. By using paired sequence reads instead of single sequence reads, the scientists can jump over repeat sequences, constituting about 62% in sorghum, and produce an accurate and contiguous picture of the entire sorghum genome.

"I was very pleased that our earlier DNA sequencing concept has worked so well with an important genome like sorghum," Messing said. "The efficiency and utility of this method will make it faster and far less expensive to sequence other complex genomes in the future."

The investigators chose sorghum, which is in the same family (grasses) as maize, rice and wheat, because of its importance for civilization. "We are interested in it for food and animal feed, and more recently as the basis of a biofuel," Messing said.

In the United States, sorghum is mainly used as feed and it is grown in the south because it tolerates drought. One variety, known as grain sorghum, is a food staple in places such as Africa and India. According to Daniel G. Peterson, another of the paper's senior authors, sorghum is h
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Contact: Joseph Blumberg
blumberg@ur.rutgers.edu
732-932-7084 x652
Rutgers University
Source:Eurekalert  

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