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Plant Pathology Journal
  Year: 2008 | Volume: 7 | Issue: 1 | Page No.: 40-44
DOI: 10.3923/ppj.2008.40.44
Sources of Tolerance to Root-Knot Nematode, Meloidogyne javanica, in Cultivated and Wild Tomato Species
Idorenyin A. Udo, Michael I. Uguru, Rufus O. Ogbuji and Donald A. Ukeh

Abstract:
Five elite tomato cultivars (HT-5044, HTA-18, HTA 19, HTA-31 and HT-Ravid 244), two locally gown Nigerian cultivars (Roma VF and Nsukka local) and a wild tomato related species (Lycopersicon pimpinellifolium) were assayed for their responses to an indigenous population of M. javanica in the greenhouse. Infected plants were scored for galling on a 0-5 rating scale. The cultivars HTA-18 and HTA-31 had significantly (p< 0.05) fewer gall counts per root system and per gram fresh weight of root than the other cultivars. Single degree of freedom analysis showed that HTA-18, HTA-19 and HTA-31 had significantly (p< 0.05) fewer galls than the locally grown cultivars. HTA-18 and HTA-31 were moderately susceptible with Gall Index (GI) of 3, while the rest of the cultivars were highly susceptible (GI>4). The nematode caused a significant delay in flowering and a decrease in fresh and dry weights of roots, stems and leaves in the cultivars, HT-5044, Roma VF and Nsukka local. HTA-18, HT-Ravid 244 and the wild species were considered tolerant.
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How to cite this article:

Idorenyin A. Udo, Michael I. Uguru, Rufus O. Ogbuji and Donald A. Ukeh, 2008. Sources of Tolerance to Root-Knot Nematode, Meloidogyne javanica, in Cultivated and Wild Tomato Species. Plant Pathology Journal, 7: 40-44.

DOI: 10.3923/ppj.2008.40.44

URL: https://scialert.net/abstract/?doi=ppj.2008.40.44

 
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