The culture of the Barbados cherry has increased great interest in the consuming market, in view of high levels of vitamin C, each 100ml of juice has contents of 1,325mg / 2,250mg of vitamin C (Ascorbic acid).With the increase of the plantations phytosanitary problems appeared, such as infection of the roots for nematodes. The utilisation of chemical products for controlling nematodes is unsafe for the environment, therefore the election of resistant and tolerant genotypes is the best solution for this problem. The work was developed in greenhouse, with eighteen genotypes of Barbados cherry aiming to find resistant genotypes to Meloidogyne incognita race 2, marked with iso-enzymatic markers, indicating plants destined for rootstock. Sixty days after the inoculation, the evaluation of the variables began: amount of eggs per plant and weight of root, index of galls and eggs mass, fresh biomass relative to the root systems, fresh biomass relative to the aerial part. The results permitted to identify the genotype 023-CMF as the less susceptible and the genotypes 027-CMF and 035-CMF as the most susceptible. Studies carried out through iso-enzymatic electrophoresis with the systems α -esterase, acid phosphatase and peroxidase. Twenty, forty and sixty days after the inoculation with eggs of M. incognita race2, made it possible to relate the expression of proteins with the susceptibility. The genotypes genetically closer, with index of similarity 0.941 are: 027-CMF and 026-CMF, 046-CMF and 026-CMF and 041-CMF and 026-CMF. The lesser indices of genetic similarity 0.115 are: genotypes 002-SPE and 036-CMF.
rootstock; nematode; isoenzymes
