Characterization of some wild types of tomato Lycopersicum sp and evaluation of their susceptibility to root-knot nematode Meloidogyne spp.
Abstract
This research was carried out in the Green House Company (1500 meters from Latakia city center), inside a 45-square-meter plastic house during 2018. The aim of the research was to evaluate the susceptibility of five wild tomato germplasms (Farah, Fortumino, F3-9, F3-11, Sigma) to infection by root-knot nematodes Meloidogyne spp., in comparison with a commercial hybrid F1 (Pestona). Seedlings were infected with high density of nematode suspension (3000 larvae / ml nematode suspension). Morphological characteristics of the plants: nature of growth, color and nature of the stem, shape, size and color of the flower and number of leaves in the leaf were taken into account. Some indicators of nematode infection, such as root galling rate, galls index, and number of egg masses were also considered. The results showed a variation between the studied germplasms in terms of strength of growth: Sigma and Fortomino were distinguished by high growth strength. All the studied wild germplasms were not limited in growth, except for the F3-11 and the commercial hybrid F1 (Pistona). Sigma achieved the lowest value in the average number of egg masses on the roots (9.75), and the average galling rate was (2.75). The results also showed that F3-11 was the most sensitive to infection, it achieved the highest value for the average number of egg masses (50.5), and the average galling rate was (5) with a significant difference from Sigma.
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