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New Miscanthus hybrid discovery in Japan could open doors for biofuel industry
Date:12/21/2010

In the minds of many, Miscanthus x giganteus is the forerunner in the race of viable feedstock options for lignocellulosic bioenergy production. But researchers believe "putting all their eggs in one basket" could be a big mistake. Scientists at the University of Illinois recently reported the first natural occurrence in several decades of Miscanthus hybrid plants in Japan.

"If M. x giganteus is the only variety available, there are certainly risks involved such as diseases or pests causing widespread establishment problems or yield losses," said Ryan Stewart, assistant professor of horticulture in the Department of Crop Sciences at the University of Illinois. "We are trying to find Miscanthus hybrids to increase our options. In doing so, it's a way to hedge our bets."

M. x giganteus is a sterile triploid (three sets of chromosomes) formed by a natural cross of M. sacchariflorus and M. sinensis. Because it's sterile, it can only be propagated by vegetative division, which is somewhat more difficult than propagating by seed, Stewart said.

"Because it's a sterile clone, it's more or less a dead-end for plant breeders because it can't be improved through plant breeding," he said.

Stewart and his team investigated overlapping populations of tetraploid M. sacchariflorus and diploid M. sinensis in Japan in hopes of finding triploid hybrid plants that may be similar in productivity to M. x giganteus. However, finding this occurrence out in the wild is a rare event, he said.

"In Japan, even when two plant species are adjacent to one another, they may have very different flowering times, meaning the likelihood of finding a hybrid is very low," Stewart added.

But Stewart knew that there were certain areas in Japan where M. sacchariflorus and M. sinensis sat side by side and had overlapping flowering times. So, with the help of
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Contact: Jennifer Shike
jshike@illinois.edu
217-244-0888
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Source:Eurekalert  

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