Reaction of some local tomato accessions of National Gene Bank of Iran to Root Knot Nematode (Meloidogyne javanica) under greenhouse conditions

Root knot nematodes (Meloidogyne spp.) are widespread in the tomato fields and they are the most important parasitic nematodes of tomato. Recognition and use of resistant or tolerant cultivars are most suitable control of measures the nematodes. In this survey, 14 local tomato accessions were screened against M. javanica during 2016-2017. The experiments were managed in completely randomized design in greenhouse condition. After sowing the seeds and reaching stages 3-4 leaves, each treatment was inoculated with 6000 eggs and larvae and 60 days after inoculation the growth parameters and reproduction factor were measured. In this survey, the eight tomato accessions vz., TN-72-950, TN-72-997, TN-72-955, TN-72-992, TN-72-918, TN-72-1088, TN-72-1019 and TN-72-1126 with Rf ≤1 and GI > 2 showed hyper susceptible, the three tomato accessions viz., TN-72-1109, TN-72-939, TN-72-1122, and control with Rf >1and GI> 2 were susceptible and the three tomato accessions viz., TN-72-938, TN-72-1041, TN-72-1012 with Rf ≤1and GI> 2 showed relatively resistance with the characteristics of hyper sensitivity reaction.