Zennah Kosgey defends her PhD in Plant Pathology.
Fusarium head blight (FHB or scab) and stem rust are important diseases of wheat. FHB is
caused by many Fusarium species, though F. graminearum is considered the primary causal
agent. Currently, there is a lack of information on the reaction of Kenyan and Ethiopian wheat
germplasm to FHB. This study evaluated 215 wheat genotypes from Kenya and Ethiopia for
their response to F. graminearum in inoculated and mist-irrigated nurseries established in St Paul
and Crookston. Six genotypes with stable resistance across the three test locations were
identified. Positive associations were identified between FHB index, VSK, and DON and
negative associations were identified between FHB index, plant height, and heading dates. The
response of select genotypes was confirmed under greenhouse conditions.