Among factors limiting to the yield of the coffee crop are the diseases, deserving prominence the nematode Meloidogyne exigua. The objective of this work was to assess the level of resistance of 13 clones (1V, 2V, 3V, 4V, 5V, 6V, 7V, 8V, 9V, 10V, 11V, 12V and 13V) wich composes the clonal variety 'Vitória INCAPER 8142' of conilon coffee (Coffea canephora Pierre), to M. exigua. The 13 clones and more one control (C. arabica, cv. Catuaí IAC-44) were inoculated with 7,000 individuals of M. exigua. After 180 days of inoculation, the final population of nematodes per root system was determined. For determination of the resistance levels, both the reproduction factor and the reduction of the reproduction factor were considered. The variety 'Vitória INCAPER 8142' presented clones with different levels of resistance. Clones 1V, 4V, 7V, 9V and 12V behaved as susceptible or efficient host and the other clones were resistant or non-efficient host.Key words: Coffea canephora, clones, robust coffee, resistance, root-knot nematode. RESUMEN Entre los factores que limitan la productividad de los cultivos de café en Brasil son las enfermedades, especialmente el nematodo Meloidogyne exigua presenta relevancia. El objetivo de este estudio fue evaluar la resistencia de 13 clones (1V, 2V, 3V, 4V, 5V, 6V, 7V, 8V, 9V, 10V, 11V, 12V y 13V) que comprenden la variedad clonal de café Conillón "Vitoria INCAPER 8142" (Coffea canephora
The 'Vitória Incaper 8142' variety of conilon coffee (Coffea canephora), presents superior productivity in relation to the others released so far. It consists of thirteen elite clones, whose cultivation is performed in lines. This work aimed to quantify the initial development of the clones which compose 'Vitória Incaper 8142' variety. The experiment was conducted in greenhouse, under a completely randomized design, with 13 treatments (clones) and seven repetitions. The plants were cultivated in vases and evaluated by 210 days after plantation. The 1V, 2V, 8V, 11V and 13V clones presented superior development in relation to the others concerning leaf number, plant height, plagiothropic branch emission, stem dry matter, root dry matter, air part dry matter and total dry matter. In general, this cultivar presents two groups of clones concerning the development by 210 days of plantation. The data indicates that the management can be different among the clones since the initial stage and that studies involving different environments are necessary in order to confirm these results.Key-words: coffee tree clones; management; robust coffee; Vitória conilon. RESUMOA variedade 'Vitória Incaper 8142' de café conilon (Coffea canephora), apresenta produtividade superior a todas as demais até então lançadas. Esta é composta por treze clones elites, cujo plantio é realizado em linhas. O objetivo deste trabalho foi quantificar o desenvolvimento inicial dos clones que compõem a variedade 'Vitória Incaper 8142'. O experimento foi conduzido em casa de vegetação, sob o delineamento experimental inteiramente casualizado, com 13 tratamentos (clones) e sete repetições. As plantas foram cultivadas em vasos e avaliadas até os 210 dias após o plantio. Os clones 1V, 2V, 8V, 11V e 13V apresentaram desenvolvimento superior aos demais nas variáveis número de folhas, altura de planta, taxa de emissão de ramos plagiotrópicos, matéria seca de caule, matéria seca de raiz, matéria seca de parte aérea e matéria seca total. Em geral, essa cultivar apresenta, dois grupos de clones quanto ao desenvolvimento até os 210 dias do plantio. Os dados encontrados indicam que o manejo poderá ser diferenciado entre os clones desde a fase inicial e que são necessários estudos envolvendo diferentes ambientes para confirmação destes resultados.
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