Evaluación de la resistencia de un híbrido F1 de Solanum quitoense Lam. a Neoleucinodes elegantalis (Guenée) y Meloidogyne incognita

Abstract

The aim of this study was to cross lulo plants of cv. La Selva to obtain a hybrid with tolerance to the fruit borer Neoleucinodes elegantalis Guenee (Lepidoptera: Crambidae) and to the nematode Meloidogyne incognita (Kofoid & White) (Nematoda: Heteroderidae), to obtain better-adapted plants to the conditions of the Colombian coffee-growing region and with bigger and non-dehiscent fruits. La Selva cultivar is a hybrid developed from the interspecific backcross of Solanum quitoense Lam. × Solanum hirtum Vahl with plants of lulo cv. Castilla Larga Vida. The experiment was conducted in the municipality of Dosquebradas, Risaralda, Colombia, located at 1,465 m a.s.l. F1 plants were obtained from reciprocal crossings. When inoculated with the nematode M. incognita, plants showed susceptibility in their seedling stage; however, when we carried out the evaluation six months after transplantation under field conditions, nematode infestation was less than 1%, which likely indicates the tolerance of these materials to the nematode. When assessing the resistance of the hybrid to the attack of N. elegantalis, we found that the evaluated materials were resistant to this insect. The resulting hybrids showed good agronomic characteristics, such as a good morphological structure and vigor, high productivity, good solar exposure adaptation, large fruits (5.6 cm average diameter) similar to those of cv. Castilla, with yellow peel, green pulp and non-dehiscent fruits with pleasant aroma and flavor. As an undesirable characteristic plants had thorns on leaves and stems.