Introgressing resistance to Turcicum leaf blight and mapping of associated quantitative trait loci in sorghum
Abstract
107 words
Screening for Turcicum leaf blight was carried out in F2 and
F2:3 segregating sorghum populations under field and controlled
conditions. Disease severity as a percentage of leaf area
covered by lesions was computed and the lesion type was
characterized. The disease severity of F2 plants indicated a
major dominant gene for resistance while F2:3 disease scores
suggested quantitative inheritance. The two lesion types
segregated monogenically among the F2:3 lines. Single marker
analysis showed that the major gene for the resistance to
Turcicum leaf blight is probably located close to the sorghum
plant’s locus for colour and to Xtxp95 in the sixth chromosome
in the sorghum genome map.
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