Abstract

HERNANDEZ-OCHANDIA, Dainé et al. Reaction of genotypes BAT-306 and Triunfo-70 of Phaseolus vulgaris L. to Meloidogyne incognita (Kofoid and White) Chitwood. Rev. Protección Veg. [online]. 2016, vol.31, n.3, pp.224-227. ISSN 1010-2752.

The objective of this research was to determine the susceptibility / resistance behavior of the cultivars BAT-306 and Triunfo-70 of common bean (Phaseolus vulgaris L.) to Meloidogyne incognita (Kofoid and White) Chitwood under semi-controlled conditions. Pots with 1kg of substrate were used, and the plants were inoculated with a 6 initial population (Pi) geometric series of nematodes (0.125; 0. 25; 1; 4; 16 and 64 eggs and second stage juveniles (J₂) per substrate gram^-1) population initially isolated from common bean growing in Mayabeque province, Cuba. The nematode final population (Pf) was determined at 60 days, and the Reproduction Factor (RF)= Pf/Pi was determined. The cultivar Triunfo-70 was resistant when Pi was lower than 64 eggs and second stage juveniles (J₂) per substrate gram^-1, with an RF between 0.23 and 0.9; nevertheless, BAT-306 freely allowed the  nematode reproduction, with an RF between 6.1 and 8. The genotypes BAT-306 and Triunfo-70 could be used as susceptible and resistant controls, respectively, in common bean behavior studies in the presence of Cuban populations of M. incognita

Keywords : common bean; root knot nematodes; host resistance; host susceptibility.

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