Resumen

LEYVA-MIR, Santos Gerardo; GONZALEZ-SOLANO, Carlos Manuel; RODRIGUEZ-PEREZ, Juan Enrique  y  MONTALVO-HERNANDEZ, Domingo. Behavior of advanced lines of tomato (Solanum lycopersicum L.) to phytopathogens at Chapingo, Mexico. Rev. Chapingo Ser.Hortic [online]. 2013, vol.19, n.3, pp.301-313. ISSN 2007-4034.  https://doi.org/10.5154/r.rchsh.2012.12.070.

A test was conducted at the experimental field of Universad Autónoma Chapingo using the randomized complete block design with four replications, in order to assess the response of 18 experimental lines and two commercial genotypes (Solanum lycopersicum L.) of tomato against natural infection of pathogens (Alternaria solani, Phytophthora infestans, Fusarium oxysporum, Nacobbus spp. and Meloidogyne spp.) of economic importance. We evaluated the severity degree of five pathogens on plants of the genotypes considered. Before evaluation, each pathogen was identified in the laboratory by morphology of their reproductive structures. The Friedman nonparametric test was applied to the data obtained, and then multiple ranges were compared. Sources of resistance were found for Alternaria solani with end severity of 35 % compared to the susceptible genotype of 80 %. Phytophthora infestans end severity reached 60 %, while the susceptibility was 100 %. Fusarium oxysporum had a value of 10 % of damage against susceptible with 40 %. Tolerance with records of 30 % galling and 76 % in susceptible lines were determined with respect to nematodes (Nacobbus spp. and Meloidogyne spp.).

Palabras llave : Resistance; Alternaria solani; Phytophthora infestans; Fusarium oxysporum; Nacobbus spp.; Meloidogyne spp.