Purple blotch, caused by (Ellis) Cifferi, is a serious disease incurring heavy yield losses in the bulb and seed crop of onion and garlic worldwide. There is an immediate need for identification of effective resistance sources for use in host resistance breeding. A total of 43 genotypes were screened for purple blotch resistance under field conditions. accession 'CBT-Ac77' and cultivar 'Arka Kalyan' were observed to be highly resistant. inoculation of a selected set of genotypes with , revealed that 7 days after inoculation was suitable to observe the disease severity. screening of 43 genotypes for resistance to revealed two resistant lines. An additional 14 genotypes showed consistent moderate resistance in the field as well as evaluations. Among the related species, and showed the least disease index and can be used for interspecific hybridization with cultivated onion. Differential reaction analysis of three isolates () in 43 genotypes revealed significant variation among the evaluated species ( = 0.001). All together, the present study suggest that, the newly identified resistance sources can be used as potential donors for ongoing purple blotch resistance breeding program in India.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5117860 | PMC |
| http://dx.doi.org/10.5423/PPJ.OA.02.2016.0034 | DOI Listing |
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