RESUMO Vários nematoides têm sido relatados causando danos ao feijoeiro comum, sendo o principal deles o das galhas (Meloidogyne incognita). Objetivou-se avaliar a reação de 20 genótipos de feijão frente à infestação por M. incognita, em experimento conduzido em casa-de-vegetação e delineamento inteiramente casualizado. As plantas foram inoculadas com 4.000 ovos + J2 deM. incognita e, aos 60 dias após a inoculação, retiradas para avaliação da massa fresca da raiz e da parte aérea, nematoides por planta e por grama de raiz e fator de reprodução. Os genótipos BGF0011762, BGF0011854, BGF0011861, BGF0011862, BGF0011987, BGF0012533, BGF0013294, BGF0013355, BGF0013875 e BGF0013955 foram classificados como resistentes. A análise de componentes principais explicou 91,22 % da variabilidade entre as variáveis de reprodução do nematoide (nematoide por planta e por grama de raiz e fator de reprodução) e as variáveis fenotípicas do feijoeiro. A massa fresca da raiz e da parte aérea apresentaram alta correlação entre si, mas também relação inversa com os nematoides por planta e densidade populacional de nematoides. comum Meloidogyne incognita. . incognita) Objetivouse Objetivou se 2 M casadevegetação casa vegetação casualizado 4000 4 000 4.00 J deM 6 inoculação BGF0011762 BGF BGF0011854 BGF0011861 BGF0011862 BGF0011987 BGF0012533 BGF0013294 BGF0013355 BGF001387 BGF001395 resistentes 9122 91 22 91,2 si 400 00 4.0 BGF001176 BGF001185 BGF001186 BGF001198 BGF001253 BGF001329 BGF001335 BGF00138 BGF00139 912 9 91, 40 0 4. BGF00117 BGF00118 BGF00119 BGF00125 BGF00132 BGF00133 BGF0013 BGF0011 BGF0012 BGF001 BGF00 BGF0

ABSTRACT Several nematodes have been reported to damage common bean, being the main one the root-knot nematode (Meloidogyne incognita). This study aimed to evaluate the reaction of 20 common bean genotypes against the infestation of M. incognita, in an experiment conducted under greenhouse conditions, in a completely randomized design. The plants were inoculated with 4,000 eggs + J2 of M. incognita and, at 60 days after inoculation, they were removed for evaluation of root and shoot fresh mass, nematodes per plant and per gram of root, and reproduction factor. The BGF0011762, BGF0011854, BGF0011861, BGF0011862, BGF0011987, BGF0012533, BGF0013294, BGF0013355, BGF0013875 and BGF0013955 genotypes were classified as resistant. The principal component analysis explained 91.22 % of the variability among the nematode reproduction variables (nematode per plant and per gram of root, and reproduction factor) and the common bean phenotypic variables. The root and shoot fresh mass showed a high correlation between themselves, but also manifested an inverse relationship with nematodes per plant and nematode density population. rootknot knot Meloidogyne incognita. . incognita) 2 M conditions design 4000 4 000 4,00 J 6 inoculation factor BGF0011762 BGF BGF0011854 BGF0011861 BGF0011862 BGF0011987 BGF0012533 BGF0013294 BGF0013355 BGF001387 BGF001395 resistant 9122 91 22 91.2 themselves population 400 00 4,0 BGF001176 BGF001185 BGF001186 BGF001198 BGF001253 BGF001329 BGF001335 BGF00138 BGF00139 912 9 91. 40 0 4, BGF00117 BGF00118 BGF00119 BGF00125 BGF00132 BGF00133 BGF0013 BGF0011 BGF0012 BGF001 BGF00 BGF0