Resumo

RODRIGUEZ-HERNANDEZ, Mayra G. et al. Resistance of INCASoy-36 (Glycine max (L.) Merrill.) cultivar to cuban population of Meloidogyne incognita (Kofoid and White) Chitwood. cultrop [online]. 2018, vol.39, n.4, pp. 60-65. ISSN 1819-4087.

To determine the resistant/ susceptibility behavior of the soybean (Glycine max L.) cuban cultivar INCASoy-36 to M. incognita and the damage that different population levels may cause. The inoculum was preparing using NaOCl and four treatments were established: control (whiteout nematodes) and three population levels (1.5; 2.5 and 5 eggs-juveniles per gram of soil^-1), with complete random design and 7 replicas.  The Root Galling Index (IA), Reproduction Factor (FR), and with these data, the categories as host or not and Resistant / susceptible were establish at 35 days. The parameters plant high;leaf, flowers and legume numbers were determined; beside steam diameter and fresh weigh. The data were analyzed by Simple Variance Analysis and the media were compere (p<0.05). For determine the relation between nematode population levels and some develop parameters the regression analysis PROC GLM, using SAS (Version 9.0 SAS) were used. INCASoy-36 do not was host for M. incognita race 2, with reproduction factors between 0.1 and 0.9, showing it resistant behavior because the nematode can’t reproduce; nevertheless, the high (R² = 0.751) and fresh weigh (R² =0.859) were significantly affected; beside the leaf, flowers and legumes number.  According to the results, the cultivar is classified as resistant and intolerant to M. incognita

Palavras-chave : soybean; root knot nematodes; legumes; hosts.

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