Generation Mean Analysis for Turcicum Leaf Blight in Ugandan Sorghum
Abstract
143 words
Sorghum (Sorghum bicolor (L.) Moench) is frequently
devastated by Turcicum leaf blight, caused by Exserohilum
turcicum, leading to considerable grain and fodder yield losses.
However, the mechanism of inheritance of resistance to E.
turcicum in sorghum is poorly understood. Studies were carried
out in Uganda to determine the mode of inheritance of E.
turcicum resistance in sorghum. Segregating families derived
from a cross of MUC007/009 (resistant) and Epuripuri
(susceptible, an elite sorghum variety) were used along with
the two parents. This was done together with four checks,
namely GAO6/106 (moderately resistant), Lulud (susceptible),
MUC007/010 (resistant) and GAO6/18 (moderately
susceptible). The results of this study suggest that resistance in
sorghum to E. turcicum is quantitative, with some contribution
of additive, dominance and epistatic effects. It also highlights
that the effect of the environment on the disease response of
specific sorghum genotypes can be major.
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