The use of wild relatives in regular breeding programmes is complicated by the long reproductive breeding cycle of cassava, high genetic load that is released on backcrossing, and linkage drag associated with the use of wild relatives in crop improvement. A project was initiated at CIAT to accelerate the process of introgression of useful genes from wild relatives into cassava via a modified Advance Back Cross QTL (ABC-QTL) breeding scheme. We describe here advances in the last 6 months in the introgression of resistance to delayed post harvest physiological deterioration (PPD), whiteflies, cassava green mites, and horn worm from wild Manihot species into cassava. We also describe new collections of wild Manihot species carried out by project partners in Brazil as well as progress in molecular breeding of resistance to CMD and cassava green mites resistance by partners in Africa.
In: Proceedings of the GCP 2006 Annual Research Meeting:Generation Challenge Programme Competitive and Commisioned Research Project Mid-Year Reports. Mexico D.F.:Generation Challenge Programme. pp.24-28