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Peach genome offers insights into breeding strategies for biofuels crops
Date:3/24/2013

Rapidly growing trees like poplars and willows are candidate "biofuel crops" from which it is expected that cellulosic ethanol and higher energy content fuels can be efficiently extracted. Domesticating these as crops requires a deep understanding of the physiology and genetics of trees, and scientists are turning to long-domesticated fruit trees for hints. The relationship between a peach and a poplar may not be obvious at first glance, but to botanists both trees are part of the rosid superfamily, which includes not only fruit crops like apples, strawberries, cherries, and almonds, but many other plants as well, including rose that gives the superfamily its name.

"The close relationship between peach and poplar trees is evident from their DNA sequence," said Jeremy Schmutz, head of the Plant Program at the U.S. Department of Energy Joint Genome Institute (DOE JGI).

In the March 24 edition of Nature Genetics, Schmutz and several colleagues were part of the International Peach Genome Initiative (IPGI) that published the 265-million base genome of the Lovell variety of Prunus persica.

"Using comparative genomics approaches, characterization of the peach sequence can be exploited not only for the improvement and sustainability of peach and other important tree species, but also to enhance our understanding of the basic biology of trees," the team wrote. They compared 141 peach gene families to those of six other fully sequenced diverse plant species to unravel unique metabolic pathways, for instance, those that lead to lignin biosynthesisthe molecular "glue" that holds the plant cells togetherand a key barrier to deconstructing biomass into fuels.

For bioenergy researchers, the size of the peach genome makes it ideal to serve as a plant model for studying genes found in related genomes, such as poplar, one of the DOE JGI's Plant Flagship Genomes (http://bit.l
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Contact: David Gilbert
degilbert@lbl.gov
925-296-5643
DOE/Joint Genome Institute
Source:Eurekalert

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