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Host status of some selected Brazilian upland rice cultivars to Meloidogyne incognita race 4 and Rotylenchulus reniformis

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For more content, see Nematologica.

Nowadays, rice is among the most preferred crops for rotation with soybean and cotton in the large producing areas of Central Brazil. Nevertheless, the host status of the Brazilian upland rice cultivars for Meloidogyne incognita race 4 and Rotylenchulus reniformis has not been investigated and remains unknown. This study dealt with the assessment of the host response of some selected Brazilian upland rice cultivars to these nematodes under glasshouse conditions. The host status for each tested interaction was based on the nematode reproduction factor (RF) and number of nematodes (g root)–1. Two experiments with M. incognita race 4, referred to as trial 1 (initial population (IP) = 4000) and trial 2 (IP = 800), included, respectively, 14 cultivars (cvs AN Cirad 141, BRS Monarca, BRS Primavera, AN Cambará, BRS Pepita, BRS Curinga, BRS Sertaneja, IAPAR 9, IAPAR 62, IAPAR 63, IAPAR 64, IAPAR 117, IAC 201, IAC 202) and 19 cultivars (the same ones in Experiment 1 plus cvs BRS Maravilha, BRS Talento, BRS Bonança, Ricetec Ecco, BRS Soberana). Except for cv. BRS Pepita, rated as resistant, the cultivars were rated as susceptible or moderately susceptible (RF means ranged from 1.09 to 12.56). In a third experiment with R. reniformis (IP = 1800) that included the same cultivars as in Experiment 1, all cultivars were rated as resistant (RF means ranged from 0.01 to 0.29).

Affiliations: 1: Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, C.P. 09, 13418-900, Piracicaba, SP, Brazil;, Email: jeronimo_agro@hotmail.com; 2: Departamento de Fitopatologia e Nematologia, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, C.P. 09, 13418-900, Piracicaba, SP, Brazil

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/content/journals/10.1163/138855410x498923
2010-10-01
2016-12-04

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