8. Characterization of incomplete resistance to Hemileia vastatrix in the icatu coffee population

Eskes, A. B.; Costa, Waldir Marques da

doi:10.1007/bf00021478

Cited by 12 publications

(24 citation statements)

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“…A incidência intermediária é importante, considerando-se que não é possível selecionar progênies com resistência horizontal naquelas que não apresentaram sintomas da doença, pois elas, provavelmente, têm resistência do tipo vertical ou específica, que encobre a resistência não-especifica. Uma explicação sugerida para o material estudado apresentar, além da resistência específica, a expressão da resistência não-específica é, presumivelmente, o cultivar Icatu ser um dos parentais e ter os dois tipos de resistência, como informam Alvarenga et al (1998);Costa & Ribeiro (1975) e Eskes & Costa (1983). Os últimos autores encontraram progênies moderadamente resistentes, o que indica, possivelmente, resistência do tipo horizontal ou não específi-ca.…”

Section: Médiaunclassified

“…Robson (1979),citado por Almeida (1980), sugeriu a possibilidade de se obterem cafeeiros com resistência não-específica. A viabilidade da estratégia pode ser proporcionada pela existência de germoplasma apresentando esse tipo de resistência, como o Icatu (Costa & Ribeiro, 1975;Eskes & Costa, 1983) e Híbrido de Timor e seus derivados (Almeida, 1980;Barbosa et al, 2005 Em condições naturais de epidemia, o número de pústulas por folha infectada é a característica que melhor discrimina níveis de resistência horizontal em cultivares de C. arabica (Ribeiro et al, 1981).…”

Section: Introductionunclassified

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Seleção de progênies F4 de cafeeiros obtidas pelo cruzamento de Icatu com Catimor

Botelho

Mendes²,

Carvalho

et al. 2010

Rev. Ceres

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Selection of F 4 coffee progenies, obtained from Icatu x Catimor crossThe objective of this work was to select progenies of productive and rust resistant coffee plants. An experiment was installed and carried out in Machado, MG, Brazil, where 29 progenies obtained from the Icatu x Catimor cross were evaluated and selected by the coffee plant genetic improvement program coordinated by EPAMIG. Cultivar Ruby MG 1192 was used as control. The experiment was arranged in a randomized block design with three repetitions. Production of processed coffee in 60 kg bags.ha -1 from six harvests, from 2001/2002 to 2006/2007, vegetative vigor evaluated after the 2006/2007 harvest and the incidence and severity of rust in the first semester of 2006 were analyzed. Variability was observed for production and rust resistance, which was confirmed by heredability estimates of good magnitude, varying from 58.5% for production to 92.6% for rust incidence. These results allied to good production means, low rust incidence and severity and good vegetative vigor of some progenies, show that it is possible to select superior progenies on the basis of production and rust resistance. para produção e resistência à ferrugem, resultados confirmados pelas estimativas da herdabilidade de boa magnitude, variando de 58,5% para a produção a 92,6% para a característica incidência da ferrugem. Esses resultados, aliados às boas médias de produção, à baixa incidência e severidade da ferrugem ao bom vigor vegetativo de algumas progênies, demonstram que é possível selecionar progênies superiores com base na produção e resistência à ferrugem.

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Section: Médiaunclassified

Section: Introductionunclassified

Seleção de progênies F4 de cafeeiros obtidas pelo cruzamento de Icatu com Catimor

Botelho

Mendes²,

Carvalho

et al. 2010

Rev. Ceres

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“…In Londrina, 'Catucaí Amarelo 20/15 cv 479' was partially resistant not different from the IPR 103 cultivar ("Catucaí") that had presented a good level of partial resistance in a previous study by Sera et al (2010b). The resistance found in 'IPR 103' and 'Catucaí Amarelo 20/15 cv 479' probably came from "Icatu" , because different partial resistance levels had been frequently detected in "Icatu" plants (Monaco and Carvalho 1975, Eskes and Carvalho 1983, Eskes and Costa 1983, Eskes et al 1990). Inheritance studies in "Icatu" plants and "Hibrido de Timor" descendents with different levels of incomplete resistance indicated the presence of one or a few minor partially dominant genes.…”

Section: Resultsmentioning

confidence: 85%

Rust resistance in Arabic Coffee cultivars in northern Paraná

Grossi

Sera

et al. 2013

Braz. arch. biol. technol.

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“…The severity in each period were used to generate a graphic of evolution of each disease and the area under the disease progress curve (AUDPC) were calculated and used to compare the level of resistance of the genotypes [7].…”

Section: Discussionmentioning

confidence: 99%

Severity of Leaf Rust and Brown Eyespot in Genotypes of <i>Coffea arabica</i> L. Cultivated with High Plant Density

Rodrigues¹,

Tomaz²,

Apostólico³

et al. 2014

AJPS

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This study investigated the severity of leaf rust and brown eyespot in genotypes of Coffea arabica L. cultivated with high plant density in the region of Caparaó-ES. The experiment was conducted in a competition field, cultivated with high plant density (8333 plants per hectare), following a randomized block design, with 16 genotypes and four replications. The plants were evaluated during consecutive harvests to study two complete reproductive cycles (from 2010 to 2012). Data were obtained for the phenologicalstages of flowering, graining, maturation and vegetative rest of each cycle. The severity of leaf rust (Hemileia vastratrix) and brown eyespot (Cercospora coffeicola) was evaluated using descriptive scales. It was observed that the genotypes are able to keep a considerable level of resistance to the leaf rust and brown eyespot when cultivated with increased density. The genotypes presented variability regarding the severity of the leaf rust and brown eyespot, indicating the existence of differential levels of resistance between them. For cultivation with high plant density, the genotypes Katipó, Paraíso MG H419-1, H419-3-3-7-16-4-1-1

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8. Characterization of incomplete resistance to Hemileia vastatrix in the icatu coffee population

Cited by 12 publications

References 13 publications

Seleção de progênies F4 de cafeeiros obtidas pelo cruzamento de Icatu com Catimor

Seleção de progênies F4 de cafeeiros obtidas pelo cruzamento de Icatu com Catimor

Rust resistance in Arabic Coffee cultivars in northern Paraná

Severity of Leaf Rust and Brown Eyespot in Genotypes of <i>Coffea arabica</i> L. Cultivated with High Plant Density

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8. Characterization of incomplete resistance to Hemileia vastatrix in the icatu coffee population

Cited by 12 publications

References 13 publications

Seleção de progênies F4 de cafeeiros obtidas pelo cruzamento de Icatu com Catimor

Seleção de progênies F4 de cafeeiros obtidas pelo cruzamento de Icatu com Catimor

Rust resistance in Arabic Coffee cultivars in northern Paraná

Severity of Leaf Rust and Brown Eyespot in Genotypes of &lt;i&gt;Coffea arabica&lt;/i&gt; L. Cultivated with High Plant Density

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Severity of Leaf Rust and Brown Eyespot in Genotypes of <i>Coffea arabica</i> L. Cultivated with High Plant Density