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New method for associating genetic variation with crop traits
Date:7/22/2012

A new technique will allow plant breeders to introduce valuable crop traits even without access to the full genome sequence of that crop.

The technique, published in the journal Nature Biotechnology, links important agronomic traits in crop plants with active regions of the genome. Instead of requiring knowledge of the crop's complete genome, it identifies only expressed genes.

"For many crop plants, markers are still lacking because of the complexity of some plants' genomes and the very high costs involved," said Professor Ian Bancroft, who led the study at the John Innes Centre. "We have succeeded in developing markers based on the sequences of expressed genes, widening the possibilities for accelerated breeding through marker assisted selection."

Expressed genes are converted from genomic DNA to mRNA. Working with mRNA means that there is no need to generate a complete genome sequence from DNA, making the techniques applicable to a wide range of crops, even those with complex genomes, such as oilseed rape and wheat. It also enables the development of advanced marker resources for less studied crops that are important for developing countries or have specific medicinal or industrial properties.

The research was funded by the Biotechnology and Biological Sciences Research Council (BBSRC) and the UK Department for Environment, Food and Rural Affairs (Defra).

Peter Werner of plant breeding company KWS UK Ltd and part of the research team said "KWS UK has been delighted to be involved with this ground breaking developmental research. We will be increasingly using this approach to further improve the speed and reliability of our breeding towards the continued improvement of yield and quality of our new varieties produced within the KWS group."

In partnership with the Cambridge-based bioinformatics company Eagle Genomics Ltd, the technology, called TraitTag, is being offered as a service to plant breeders.
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Contact: Andrew Chapple
andrew.chapple@nbi.ac.uk
44-160-325-1490
Norwich BioScience Institutes
Source:Eurekalert

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