Reprodução de Meloidogyne exigua em cultivares de cafeeiros resistentes e suscetíveis

RESUMOThe damage and the resistance levels of cultivars and accessions of common bea ns rescu ed in the Sou th a nd mou nta in regions of Espírito Santo State, Brazil, to M. incognita race 3 and M. javanica pa ra sitism were evalua ted under a greenhou se. Four rescu ed bea n genotypes (" FORT-1 0" , " FORT-1 3 ", " FORT-1 6" a nd "FORT-1 9" ) and 2 commercial cultivars: "Pérola", and "Aporé", were tested. The cu ltivar " Rico-2 3 " wa s inclu ded a s sta nda rd of su sceptibility to nematodes and non-inoculated plants constituted the control. Thus, the experiment was carried out in a completely randomized design in 3 (trea tments considering nematodes) x 7 (genotypes a nd bea n cultivars) factorial arrangement, with 7 replicates. Data were measured at 5 0 da ys after pla nt inoculation. For da ma ge qu antification, the following variables were evalu ated: plant height (PHE), number of Palavras-chave adicionais: Redução do crescimento, resistência, feijoeiro, nematóides das galhas nodes (NNO), number of trifoliate leaves (NRT), fresh matter weight (FWE) and dry matter weight (DWE) of shoots, root weight (RWE), number of root nodules (NRO) and final population (FPO) of nematodes per root system. There were no significant differences between the effects caused by M. incognita and M. javanica, but both species showed inferior values of PHE, NNO, NRT, RWE, FWE and DWE compared to controls. Concerning the levels of resista nce of bean pla nts to M. incognita, the genotypes "FORT-10", "FORT-13", "Aporé" and "FORT-16" behaved as moderately resistant, the cultivars "Rico 23" and "Pérola" low resistant, and the genotype "FORT-19" as highly susceptible. When parasitized by M. javanica, the beans "FORT-19", "Rico-23", "FORT-16" and "FORT-13" were low resistant, "Pérola" and "Aporé" susceptible and "FORT-10" highly susceptible.Avaliaram-se danos e os níveis de resistência de cultivares e acessos de feijoeiro-comum resgatados nas regiões Sul e Serrana do Estado do Espírito Santo ao parasitismo de M. incognita raça 3 e M. javanica em casa de vegetação. Foram testados quatro genótipos resgatados de feijoeiro ("FORT-10", "FORT-13", "FORT-16" e "FORT-19"), e mais 2 cultivares comerciais: "Pérola" ; e "Aporé". O cultivar "Rico-23" foi incluído como padrão de suscetibilidade aos nematóides e plantas nã o inocu la da s constitu íra m a testemu nha . Desta forma , o experimento foi conduzido em delineamento inteiramente casualizado em esquema fatorial 3 (tratamentos considera ndo nematóides) x 7 (genótipos e cultiva res de feijoeiros), com 7 repetições. Os dados foram mensurados aos 50 dias após a inoculação das plantas. Para a qu antificação de danos foram avaliadas: altura das pla nta s (ALT ), número de nós (NOS), número de folhas trifolioladas (NFT), peso da Santos, L.N.S.; Alves, F.R.; Belan, L.L.; Cabral, P.D.S.; Matta, F.P.; Jesus Junior, W.C.; Moraes, W.B.Quantificação de danos e reção de genótipos de feijoeiro (Phaseolus vulgaris L.) à Meloidogyne incognita raça 3 e M. javanica. Summa Phytopathologica, v.38, n.1, p.24-29, ...

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“…A criterion to evaluate nematode resistance in plants is to measure the nematode reproductive rates in their hosts (26).…”

Section: Damage Quantification and Reaction Of Bean Genotypes (Phaseomentioning

confidence: 99%

Damage quantification and reaction of bean genotypes (Phaseolus vulgaris L.) to Meloidogyne incognita race 3 and M. javanica

et al. 2012

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“…However, currently, there are few coffee cultivars available with resistance to nematodes. Hypocotyledonary grafting, using the rootstock cultivar Apoatã IAC 2258 (C. canephora) resistant to M. exigua (Salgado et al 2005, Fonseca et al 2008, M. incognita (Sera et al 2006, Fonseca et al 2008, and M. paranaensis (Sera et al 2006, Fonseca et al 2008) has been the widely recommended strategy for nematode management in coffee-growing infested areas since 1987. Nevertheless, there are some problems in using rootstock cultivars compared to ungrafted, such as: a) segregation for susceptibility to nematodes (10 to 15%) due to the crosspollinated reproductive system of C. canephora; b) breakage in the grafting region; and c) need of replanting (about 10 to 15%) (Gonçalves and Silvarolla 2007), due to susceptible segregating plants.…”

Section: Introductionmentioning

confidence: 99%

IPR 100 - Rustic dwarf Arabica coffee cultivar with resistance to nematodes Meloidogyne paranaensis and M. incognita

Sera

Fazuoli

et al. 2017

Crop Breed. Appl. Biotechnol.

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“…This resistance has been identified in the cultivar IAC 2258 Apoatã of C. canephora (Salgado et al, 2005). In a few years the clonal cultivar of konillon coffeetrees 'Victoria INCAPER 8142' was developed, formed by a group of thirteen superior clones.…”

Section: Introductionmentioning

confidence: 99%

Reaction of Cultivar Coffee 'Vitória INCAPER 8142' of Cornillon to Parasitism of Meloidogyne exigua

Contarato

Tomaz

Alves

et al. 2014

Idesia

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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

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Reprodução de Meloidogyne exigua em cultivares de cafeeiros resistentes e suscetíveis

Cited by 18 publications

References 2 publications

Damage quantification and reaction of bean genotypes (Phaseolus vulgaris L.) to Meloidogyne incognita race 3 and M. javanica

Damage quantification and reaction of bean genotypes (Phaseolus vulgaris L.) to Meloidogyne incognita race 3 and M. javanica

IPR 100 - Rustic dwarf Arabica coffee cultivar with resistance to nematodes Meloidogyne paranaensis and M. incognita

Reaction of Cultivar Coffee 'Vitória INCAPER 8142' of Cornillon to Parasitism of Meloidogyne exigua

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