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Biotech innovation in cassava is necessary to speeding genetic improvement of this food staple. Together with breeding efforts, the new resources derived define new crops that primarily serve the developing world.  Yet the Western world knows so little about cassava. This episode of Talking Biotech is part two of the series on cassava genetic improvement.  Dr. Barbara Schaal speaks about its genetic origins, migration and domestication.  Dr. Nigel Taylor describes the extensive work ongoing at the Danforth Center on cassava, and focuses on installation of virus resistance.