Genotypic Diversity of Potato Germplasm against Root Knot Nematode (Meloidogyne incognita) Infection in Pakistan

Amjad Shahzad Gondal ,Sajjad Hyder,Nazir Javed,Sajid Aleem Khan

doi:10.33687/10.33687/phytopath.001.01.0013

Amjad Shahzad Gondal , Sajjad Hyder + Show 2 more

Open Access

https://doi.org/10.33687/10.33687/phytopath.001.01.0013

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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.

Highlights

Potato (Solanum tuberosum L.) is perennial solanaceous vegetable crop known as nightshades
All thirty seven potato cultivars varied widely in their susceptibility to M. incognita infection (P
All other potato cultivars tested against root knot nematode (Meloidogyne incognita) infection had statistically more root weight

Summary

INTRODUCTION

Potato (Solanum tuberosum L.) is perennial solanaceous vegetable crop known as nightshades. Root knot nematodes are parasitic on a broad range of vegetable crops They stand out as the major group of plant parasitic nematodes in almost all vegetable crops especially on potato and cause enormous yield losses (Mehrotra, 1983). M. incognita cause more losses to the vegetables especially to potato crops grown in the sandy loam soils of Punjab (Anwar and Mckenry, 2006). Varietal response against M. incognita infection of different vegetables is accessed on the basis of plant growth parameters including root weight, shoot weight, shoot height, number of leaves per plant and nematode reproduction parameters including number of galls, egg masses, number of females, rate of reproduction and final population of nematodes (Anwar et al, 2003; Hayat, 2011). Keeping in view the above mentioned facts, the present study aimed at exploring the source of genotypic resistance among potato germplasm against root knot nematode (Meloidogyne incognita)

MATERIALS AND METHODS

RESULTS AND DISCUSSION

CONCLUSION