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Genotypic Diversity of Potato Germplasm against Root Knot Nematode (Meloidogyne incognita) Infection in Pakistan
Amjad S. Gondal, Nazir Javed, Sajid A. Khan, Sajjad Hyder
Abstract
Potato (
Solanum tuberosum), an important vegetable crop of Pakistan endures significant yield losses due to root knot nematode (
Meloidogyne incognita).. Research wok was designed to identify resistant potato germplasm against RKN (
Meloidogyne incognita) infection. A field trial was conducted in the research area of Department of Plant Pathology, University of Agriculture Faisalabad. Thirty six (36) potato verities/ cultivars relocated five times were sown in four years sick plot containing root knot nematode (
Meloidogyne incognita) in RCBD layout. Root knot nematode reproduction and host damage was accessed by recording nematode root galls and egg mass indices, root weight, shoot weight, , number of leaves, fruit weight, rate of reproduction and final population of nematodes. Experiment revealed a considerable variation in response against
Meloidogyne incognita infection among the genotype tested but none of the single cultivar was immune. FD-8-1 was used as negative control. The cultivar FD-19-2 was highly susceptible followed by SH-692 and SH-5. All other cultivars had less galling index with low fecundity rate indicating their ability to suppress the adult female reproduction. The cultivar FD-1-3 scored least number of galls and egg mass indices followed by FD-49-62, SH-339 and SH-332.

Keywords
Root knot nematode; Meloidogyne incognita; Genotypic response; Potato; Solanum tuberosum
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DOI:
10.33687/10.33687/phytopath.001.01.0013
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Copyright (c) 2012 Amjad S. Gondal, Nazir Javed, Sajid A. Khan, Sajjad Hyder

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