HOST RESPONSES OF WHEAT GENOTYPES TO PRATYLENCHUS BRACHYURUS AND MELOIDOGYNE JAVANICA

This work aimed to evaluate the host response of twelve wheat genotypes to Pratylenchus brachyurus and Meloidogyne javanica in two distinct periods. Tests were carried out in greenhouse with an initial population of 1,200 nematodes per pot, each containing 700 mL substrate and seven wheat seedlings....

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Veröffentlicht in:Scientia agraria 2018-01, Vol.19 (1), p.8-13
Hauptverfasser: Gonçalves, Diego Francisco, Lopes, Ana Paula Mendes, Puerari, Heriksen Higashi, Dias-Arieira, Claúdia Regina
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Sprache:eng
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Zusammenfassung:This work aimed to evaluate the host response of twelve wheat genotypes to Pratylenchus brachyurus and Meloidogyne javanica in two distinct periods. Tests were carried out in greenhouse with an initial population of 1,200 nematodes per pot, each containing 700 mL substrate and seven wheat seedlings. Evaluation was done at 60 and 83 days after inoculation in the first and the second experiment, respectively. At 60 days after inoculation with P. brachyurus, all cultivars were resistant to the nematode, presenting reproduction factor RF 1. The cultivars BRS Gaivota and IPR 85 were susceptible to M. javanica in both experiments. It was concluded that the twelve wheat genotypes presented different host responses to the studied nematodes and most of them were susceptible. Este trabalho teve como objetivo avaliar a reação de doze genótipos de trigo a Pratylenchus brachyurus e Meloidogyne javanica, em dois períodos distintos. Os testes foram conduzidos em casa de vegetação, sob população inicial de 1200 nematoides por vaso contendo 700 ml de substrato e sete plântulas de trigo. As avaliações foram realizadas aos 60 e 83 dias após inoculação no primeiro e segundo experimento, respectivamente. Para P. brachyurus aos 60 dias todas as cultivares apresentaram fator de reprodução (FR) < 1. Aos 83 dias, apenas as cultivares F. Cristalina e IPR 85 apresentaram FR < 1, sendo as demais suscetíveis a P. brachyurus. 60 dias após a inoculação de M. javanica, BRS Sabiá, F. Cristalina, IPR 144, IPR Catuara Tm, Quartzo e FPS Nitron apresentaram RF> 1. Aos 83 dias, cv. A Gralha Azul, além dos já mencionados, apresentou RF> 1. As cultivares BRS Gaivota e IPR 85 foram suscetíveis a M. javanica em ambos os experimentos. Concluiu-se que os doze genótipos de trigo apresentaram diferentes respostas de hospedeiro aos nematoides estudados sendo a maioria susceptível.
ISSN:1519-1125
1983-2443
1983-2443
DOI:10.5380/rsa.v19i1.56158