Sources of resistance to yellow and stem rust in CIMMYT bread wheat derivatives in Kenya
Danial, D.L. | Kirigwi, F.M. | Kiriswa, F.L. (National Plant Breeding Research Center (NPBRC), Njoro (Kenya)) | Broers, L.H.M. (Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico). Wheat Program)
In Kenya, a total of 879 bread wheat cultivars and lines were screened for their reaction to yellow rust and stem rust. Fifteen entries were identified as having a high level of resistance to both rust populations. The selected entries were also observed to be highly resistant to yellow rust populations in Mexico and Ecuador. This indicates that the resistance genes to yellow rust in these cultivars and lines were effective against pathogen populations with a broad range of virulence. In addition, the selected entries were characterized by good agronomic performance and were well adapted to Kenyan growing conditions. Component yield analysis revealed that mean 1000 grain weight, head weight and number of tillers per plant of the selected entries were 43.0, 2.1 and 6.9 while the corresponding values for the check cultivar Pasa were 37.0, 2.2 and 5.8, respectively. Such resistant cultivars and lines are promising sources of resistance, and, therefore, can be recommended for use in breeding programs
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