Co-localization of quantitative trait loci for foliar disease resistance in sorghum |
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| Authors: | S. M. Mohan R. Madhusudhana K. Mathur C. J. Howarth G. Srinivas K. Satish R. N. Reddy N. Seetharama |
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| Affiliation: | National Research Center for Sorghum, Rajendranagar, Hyderabad 500 030, India;;Maharana Pratap University of Agriculture and Technology, Udaipur 313-001, Rajasthan, India;;Institute of Grassland and Environmental Research, Aberystwyth SY23 3EB, UK;;Corresponding author, E-mail: |
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| Abstract: | 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. |
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| Keywords: | Sorghum foliar diseases disease resistance quantitative trait loci mapping |
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