Resistência de plantas de coffea arabica, coffea canephora e híbridos interespecíficos à cercosporiose

Patrício, Flávia Rodrigues Alves; Braghini, Masako Toma; Fazuoli, Luiz Carlos

doi:10.1590/s0006-87052010000400014

Cited by 9 publications

(9 citation statements)

References 5 publications

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“…Similar results were found in the study by Andrade et al (2016), in which isolates of brown eye spot and black spot inoculated in coffee seedlings 'Mundo Novo IAC 376-4' produced lesions of the common type (brown eye spot). The severity variation of Cercospora leaf spot in different coffee cultivars has been reported by other authors (Patricio et al, 2010;Souza et al, 2012). As in the cultivars Mundo Novo IAC 376-4 and Iapar 59 are from different genetic origins and showed interactions between pathogen, host, and environment in the disease symptoms, the observed variation can be attributed to the severity of Cercospora leaf spot.…”

Section: Diferença Entre Isolados De Lesões Mancha De Olho Pardo E Cesupporting

confidence: 66%

Difference between isolates from brown eye spot and black spot lesions in coffee plants

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et al. 2019

Pesq. agropec. bras.

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The objective of this work was to evaluate the difference between the isolates from two cercospora leaf spot symptoms (brown eye spot and black spot) in relation to conidial morphology, mycelial growth, cercosporin production, and reproduction of symptoms in coffee leaves collected in three municipalities in the state of Minas Gerais, Brazil. There was a difference between the isolates for the studied variables, but without any relation to the type of symptom. The differences found were not associated with the origin of the isolates. The symptoms characterized as black spot were associated with different host conditions during the infection process.

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Section: Diferença Entre Isolados De Lesões Mancha De Olho Pardo E Cesupporting

confidence: 66%

Difference between isolates from brown eye spot and black spot lesions in coffee plants

Botelho

Resende

Rezende

et al. 2019

Pesq. agropec. bras.

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“…The other cultivars were allocated to another group that can be subdivided into two subgroups. In the first subgroup, the cultivars Catuaí Vermelho IAC 144 (1), Catuaí Vermelho IAC 15 (2), and the progeny Bourbon Amarelo UFV 535 (3) are susceptible to coffee rust (Patricio et al 2010). In addition, the first two cultivars belong to the Catuaí group, justifying the high similarity between them.…”

Section: Tablementioning

confidence: 99%

Molecular markers useful to discriminate Coffea arabica cultivars with high genetic similarity

et al. 2017

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New cultivars are released every year to meet market demands. However, in species with a narrow genetic base, such as Coffea arabica, the cultivars are closely related and phenotypically similar. This hinders the accurate discrimination of genotypes using morphological descriptors in distinctness, uniformity, and stability (DUS) testing, which is required for the registration and protection of new cultivars. In this sense, molecular markers are an auxiliary tool for accurate and precise discrimination of cultivars. This study aimed to verify the informative capacity and effectiveness of a molecular marker set to discriminate among C. arabica varieties, create a database of DNA profiles and allele frequencies, analyze the genetic diversity in this collection, and explore genetic kinships. Thirty-four C. arabica cultivars/progenies, which belong to the Brazilian Cultivar Trial, were analyzed using 31 microsatellite markers. Markers with weak bands were removed, and of the remaining, 74.07% were polymorphic and revealed 47 alleles. The obtained molecular profiles revealed segregation between and within cultivars/ progenies, and genetic variability was observed between all the cultivars/progenies. Sixteen markers were selected for dendrogram construction and for fingerprinting analysis of the cultivars. The ability of these markers to detect varietal mixture and analyze diversity between and within cultivars was also discussed in detail. The results demonstrated the effectiveness of markers in distinguishing related genotypes from those with similar phenotypic traits. This biotechnological tool will assist breeders in DUS testing of cultivars.

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“…Em cada um dos ambientes, a incidência de cercosporiose não apresentou diferenças significativas entre os tratamentos avaliados. Em São Sebastião do Paraíso, as notas tiveram variação entre 2,91 e 3,48 pontos e, em Três Pontas, a variação foi de 2,75 a 3,58, podendo ser interpretadas como valores indicativos de resistência moderada a susceptível e corroborando resultados obtidos por diversos autores, que constataram comportamento moderadamente resistente à cercosporiose, em cultivares do grupo Catuaí, e comportamento susceptível, no cultivar Icatu Vermelho (Patrício et al, 2010;Dell'Acqua et al, 2011), parentais utilizados no cruzamento das progênies avaliadas neste trabalho. Ressalta-se, ainda, que uma nutrição suficiente e equilibrada pode levar à resistência induzida à cercosporiose (Petek et al, 2007).…”

Section: Tratamentounclassified

Seleção de progênies do cruzamento entre cultivares de cafeeiros Icatu e Catuaí

et al. 2015

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Os programas de melhoramento devem ser dinâmicos e contínuos, de modo a disponibilizarem sempre novos cultivares de cafeeiros, com fatores de resistência complexos, que se constituam em eficientes barreiras para as novas raças fisiológicas do fungo H. vastatrix. Por essa razão, objetivou-se, com este trabalho, avaliar o comportamento agronômico, a resistência à ferrugem e a ocorrência de cercosporiose em progênies, provenientes do cruzamento dos grupos de cultivares Catuaí e Icatu, em dois ambientes de Minas Gerais. Os experimentos foram implantados nas Fazendas Experimentais da EPAMIG, em São Sebastião do Paraíso e Três Pontas - MG. O delineamento experimental adotado foi o látice quadrado 6 x 6, com 3 repetições. Nos dois ambientes, foram realizadas avaliações de produtividade, vigor vegetativo, percentagem de grãos com peneira 17 acima e reação à ferrugem e à cercosporiose, nos anos agrícolas 2009/2010 e 2010/2011. O desempenho das progênies avaliadas, para produtividade, em Três Pontas, foi superior quando comparado ao de São Sebastião do Paraíso. A progênie H 6-47-10 Cova 3 destacou-se entre as mais promissoras, sugerindo boas possibilidades de progresso genético na seleção.

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Resistência de plantas de coffea arabica, coffea canephora e híbridos interespecíficos à cercosporiose

Cited by 9 publications

References 5 publications

Difference between isolates from brown eye spot and black spot lesions in coffee plants

Difference between isolates from brown eye spot and black spot lesions in coffee plants

Molecular markers useful to discriminate Coffea arabica cultivars with high genetic similarity

Seleção de progênies do cruzamento entre cultivares de cafeeiros Icatu e Catuaí

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