Wednesday, June 18, 2003

gene flow:
DNA from samples from plants harvested in the three areas was extracted and purified and individuals genotyped using height molecular markers to establish the extent of gene exchange. There was clear evidence of weedy beets originating from the commercial crop field in the riverside "contact zone" some 1.5 kms away from the field.

"Contrary to classical expectations we found that gene flow through pollen was limited," explains Dr. Arnaud. "However we found that weedy beets can act as a crop-to-wild bridge by escaping from commercial beet fields to wild populations via accidental seed flow. Our results highlight the likelihood for transgene escape resulting from seed dispersal events."

forthcoming in Proceedings B


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