Components of resistance to late leaf spot caused by Phaeoisariopsis personata in inter-specific derivatives of groundnut
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Authors
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S. PANDE'*, J. NARAYANA RAO and S.L. DWIVEDI
Keywords:
Arachis hypogaea. components of resistance, inter-specific derivatives, Phaeoisariopsis personata, groundnutAbstract
Five inter-specific derivatives of groundnut (Arachis hypogaea) along with two known susceptible cultivars were studied for components of resistance to Phaeoisariopsis personata in field .and greenhouse. All the inter-specific derivatives showed significantly longer incubation and latent periods, lower lesion number, lesion frequency, smaller lesion diameter, lesser sporulation indices, less leaf area damage and less defoliation than susceptible cultivars in both environments. The correlation coefficients of incubation period, and latent period as LP, and LPso were highly significant and positive but negative and highly significant with lesion number, lesion frequency, lesion diameter, sporulation index, leaf area damage, and defoliation for all the genotypes. Among these, latent period as LP" lesion diameter, sporulation index, and percentage defoliation were major components contributing to LLS resistance in groundnut.
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