Resistance to leaf rust in coffee cultivars

Authors

  • Gustavo Hiroshi Sera Instituto Agronômico do Paraná - IAPAR
  • Tumoru Sera Instituto Agronômico do Paraná - IAPAR
  • Inês Cristina de Batista Fonseca Universidade Estadual de Londrina - UEL
  • Dhalton Shiguer Ito Instituto Agronômico do Paraná - IAPAR

Keywords:

Coffea, Hemileia vastatrix, incomplete resistance, partial resistance, SH genes

Abstract

All the Coffea arabica L. cultivars developed by the IAPAR4 were resistant to rust (Hemileia vastatrix) when registered. However, with the appearance of new races these cultivars now present different resistance levels. The aim of this work was to assess the resistance to rust in coffee cultivars developed by the IAPAR. Resistance to the local leaf rust races was assessed in high disease intensity field conditions in August 2007. Twelve coffee cultivars, from IPR 97 to IPR 108, were evaluated. ‘IAPAR 59’ and ‘Catuaí Vermelho IAC 81’ were used as resistance and susceptibility standards, respectively. The experimental design was in randomized blocks with nine replications and plots with seven plants. A scale from 1 to 5, based on rust severity, was used to evaluate resistance. Yield evaluation was based on the harvest carried out in June 2007. The cultivars IAPAR 59, IPR 97, IPR 98, IPR 104 and IPR 105 were almost 100 % rust resistant, while IPR 99, IPR 101, IPR 102 and IPR 107 presented approximately 75% of plants with complete resistance. Thus, the resistance gene(s) is probably in heterozygous condition. The cultivars IPR 103 and IPR 108 may present incomplete resistance, while the IPR 100 presented similar susceptibility to ‘Catuaí Vermelho IAC 81’ and IPR 106 may also be susceptible.

Author Biographies

Gustavo Hiroshi Sera, Instituto Agronômico do Paraná - IAPAR

Engenheiro Agrônomo, Doutor, Pesquisador do Instituto Agronômico do Paraná (IAPAR)/Área de Melhoramento e Genética Vegetal. Rodovia Celso Garcia Cid Km 375, CEP 86047-902, Três Marcos, Caixa Postal 481, Londrina (PR).

Tumoru Sera, Instituto Agronômico do Paraná - IAPAR

Engenheiro Agrônomo, Doutor, Pesquisador do Instituto Agronômico do Paraná (IAPAR)/Área de Melhoramento e Genética Vegetal. Rodovia Celso Garcia Cid Km 375, CEP 86047-902, Três Marcos, Caixa Postal 481, Londrina (PR).

Inês Cristina de Batista Fonseca, Universidade Estadual de Londrina - UEL

Engenheira Agrônoma, Doutora, Docente do Departamento de Agronomia da Universidade Estadual de Londrina. Rodovia Celso Garcia Cid, Pr 445, Km 380, Campus Universitário, Cx. Postal 6001, 86055-900, Londrina – PR.

Dhalton Shiguer Ito, Instituto Agronômico do Paraná - IAPAR

Biólogo, Doutorando em Agronomia da Universidade Estadual de Londrina (UEL). Instituto Agronômico do Paraná (IAPAR)/Área de Melhoramento e Genética Vegetal. Rodovia Celso Garcia Cid Km 375, 86047-902, Três Marcos, Caixa Postal 481, Londrina (PR). Bolsista do CNPq.

Published

2010-09-10

How to Cite

SERA, G. H.; SERA, T.; FONSECA, I. C. de B.; ITO, D. S. Resistance to leaf rust in coffee cultivars. Coffee Science - ISSN 1984-3909, [S. l.], v. 5, n. 1, p. 59–66, 2010. Disponível em: https://coffeescience.ufla.br/index.php/Coffeescience/article/view/272. Acesso em: 13 dec. 2024.

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Articles