Degree of resistance of Solanum torvum cultivars to Mi-1.2-virulent and avirulent isolates of Meloidogyne incognita, Meloidogyne javanica, and Meloidogyne luci.

Seren Sargın,Zübeyir Devran

doi:10.21307/jofnem-2021-068

Abstract

Root-knot nematodes (RKN) cause yield losses in eggplant-growing areas. There are no known varieties of eggplant (Solanum melongena L.) that are resistant to RKNs. However, the wild relative of eggplant, S. torvum (Sw.), provides resistance to some RKN species and is used as a rootstock for cultivated eggplants. Therefore, determination of the reproductive capacity of nematodes on eggplant rootstocks developed from S. torvum is required for effective management of RKNs that are widely present in vegetable growing areas. In the present study, the degree of reproduction of Mi-1.2-virulent and avirulent isolates of M. incognita, M. javanica, and M. luci on eggplant rootstocks, Hawk and Boğaç, was evaluated in a plant growth chamber. Hawk and Boğaç were resistant (< 10 egg masses per whole root system) to all avirulent and virulent isolates of M. incognita, M. javanica, and M. luci. This study is the first report on the resistance of S. torvum to virulent isolates of M. luci. Results indicate that S. torvum offers broad-spectrum resistance against RKNs.

Highlights

Root-knot nematodes (RKN) cause yield losses in eggplantgrowing areas
Solanum torvum rootstock cultivars Hawk and Boğaç, and a commercial eggplant cultivar Faselis F1 were tested with ten Mi-1.2 virulent and avirulent isolates of M. incognita, M. javanica, and M. luci
We found resistance in the two S. torvum rootstock cultivars Hawk and Boğaç to all Mi-1.2 virulent and avirulent isolates of M. incognita, M. javanica, and M. luci tested

Summary

Introduction

Root-knot nematodes (RKN) cause yield losses in eggplantgrowing areas. There are no known varieties of eggplant (Solanum melongena L.) that are resistant to RKNs. Hawk and Boğaç were resistant (< 10 egg masses per whole root system) to all avirulent and virulent isolates of M. incognita, M. javanica, and M. luci. S. torvum cultivars Tonashimu, Torero, Torvum vigor, Hawk, Brutus, Espina, Salutamu, and Torpedo were fo und to be resistant to Mi-1.2-virulent isolates of M. incognita from Japan and Turkey and Mi-1.2virulent M. javanica from Spain (Garcia-Mendivil et al, 2019). Knowledge of the response of S. torvum rootstock cultivars to various RKN populations is important for control of both Mi-1.2-avirulent and virulent populations of root-knot nematodes, which are likely to be present in mixed populations in vegetable growing areas of Turkey. We report the degree of resistance of S. torvum cultivars Hawk and Boğaç to avirulent and virulent isolates of M. incognita, M. javanica, and M. luci from Turkey

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Results

Conclusion