Co-localization of quantitative trait loci for foliar disease resistance in sorghum

S. M. Mohan, R. Madhusudhana, K. Mathur, C. J. Howarth, G. Srinivas, K. Satish, R. N. Reddy, N. Seetharama

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20 Citations (SciVal)


Quantitative trait loci (QTL) analysis of resistance to three foliar diseases, viz. target leaf spot, zonate leaf spot and drechstera leaf blight was undertaken in sorghum using 168 F7 recombinant inbred lines derived from a cross between '296B' (resistant) and 'IS18551' (susceptible) parents. The genomic region flanked by plant colour locus (Plcor) and simple sequence repeat marker Xtxp95 on chromosome SBI-06 harboured disease-response QTL for all the three diseases caused by different fungal pathogens. It is hypothesized that this region on sorghum chromosome SBI-06 could harbour a cluster of disease-response loci to different pathogens as observed in the syntenic regions on rice chromosome 4 and maize chromosome 2. The information gained in this study can be used in deploying marker-assisted selection for foliar resistance and map-based isolation of important disease resistance genes in sorghum.
Original languageEnglish
Pages (from-to)532-535
Number of pages4
JournalPlant Breeding
Issue number5
Early online date22 Apr 2009
Publication statusPublished - Oct 2009


  • Sorghum
  • foliar diseases
  • disease resistance
  • quantitative trait loci mapping


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