Agricultural Research For Improved Productivity And Livelihoods annual report 2004

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Ministry Of Agriculture
Diuraphis noxia is currently the most devastating pest of wheat and barley in Kenya causing severe yield losses and has caused farmers to demand a resistant RWA variety. The objectives of this study was to utilize doubled haploid technique to shorten the breeding cycle to produce RWA resistant lines and evaluate the lines in the greenhouse and field for resistance. Six doubled haploid lines were developed and evaluated for RWA resistance in the greenhouse and in the field. The greenhouse experiment was planted in a CRD design with a control while the field study was in paired plots in an RCBD design. Both experiments were replicated three times. Results showed that PasaIKRWA-9DH and NJBWIIKRWA-9DH performed significantly better than all other lines and compared well with the resistant parent. In both the greenhouse and the field. There were no differences between the performance of Fl and DH. The study shows the potential in DH lines to manage RWA in Kenya and increase productivity.