Biblioteca do Café
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1
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Item Coffea arabica clones resistant to coffee leaf miner(Crop Breeding and Applied Biotechnology, 2016-03) Guerreiro Filho, Oliveiro; Mendonça, Alex Paulo; Nonato, Juliana Vieira Almeida; Andrade, Vinícius Teixeira; Fatobene, Bárbhara Joana dos Reis; Braghini, Masako Toma; Prela-Pantano, AngelicaBrazilian arabica coffee production is based on a set of highly productive cultivars sexually propagated. All of them are susceptible to coffee leaf miner, Leucoptera coffeella, and most of them are also susceptible to coffee leaf rust, Hemileia vastatrix. Aiming to reduce the selection process of cultivars with multiple resistances to both biotic constraints, the Coffea arabica clones 760, 1059, 1064 and 1215 were evaluated under field conditions. The mean yield of four C. arabica clones was not statistically different from the experimental controls; however, the yield of clone 1059 was 21% higher than the control cultivar Obatã IAC 1669-20. Leaf miner resistance level in all the evaluated clones remained the same as the mother plant’s. However, the same did not occur for resistance to H. vastatrix, due to the emergence of new pathogen races. In summary, it is potentially feasible the adoption of clone 1059 as a new clonal cultivar resistant to coffee leaf miner.Item IAC Catuaí SH3 - a dwarf Arabica coffee cultivar with leaf rust resistance and drought tolerance(Crop Breeding and Applied Biotechnology, 2019) Fazuoli, Luiz Carlos; Braghini, Masako Toma; Silvarolla, Maria Bernadete; Gonçalves, Wallace; Mistro, Júlio César; Gallo, Paulo Boller; Guerreiro Filho, OliveiroThe cultivar IAC Catuaí SH3 was developed by the pedigree method, from the recombination of the coffee tree H 2077-2-5-46, of the Catuaí Vermelho germplasm, with accession IAC 1110-8, from the exotic cultivar BA10. Cultivar IAC Catuaí SH3 is high-yielding, resistant to coffee leaf rust and tolerant to drought.Item IAC Obatã 4739 – dwarf arabic coffee cultivar with yellow fruits and resistant to leaf rust(Crop Breeding and Applied Biotechnology, 2018-07) Fazuoli, Luiz Carlos; Braghini, Masako Toma; Silvarolla, Maria Bernadete; Gonçalves, Wallace; Mistro, Júlio César; Gallo, Paulo Boller; Guerreiro Filho, OliveiroCultivar IAC Obatã 4739 was derived from a cross between coffee tree IAC 1669-20-1 and cultivar Catuaí Amarelo IAC 62. It is short and high-yielding, rust-resistant, has large and yellow fruits, medium to late maturation, excellent cup quality, and responds effectively to irrigation.Item IAC 125 RN – A dwarf coffee cultivar resistant to leaf rust and root-knot nematode(Crop Breeding and Applied Biotechnology, 2018-03) Fazuoli, Luiz Carlos; Braghini, Masako Toma; Braghini, Masako Toma; Silvarolla, Maria Bernadete; Gonçalves, Wallace; Mistro, Júlio César; Gallo, Paulo Boller; Guerreiro Filho, OliveiroIAC 125 RN was derived from a cross between the coffee cultivar Villa Sarchí and the Hibrido de Timor CIFC 832/2. The coffee trees are short and re- sistant to races 1 and 2 of the nematode Meloidogyne exigua and to all races of coffee rust, Hemileia vastatrix, present in Brazil. Brazil.Item SH1 leaf rust and bacterial halo blight coffee resistances are genetically independent(Instituto Agronômico (IAC), 2017-04) Rodrigues, Lucas Mateus Rivero; Braghini, Masako Toma; Guerreiro Filho, OliveiroCoffee resistance to Pseudomonas syringae pv. garcae has been associated to pleiotropic effect of SH1 allele, present in coffee plants resistant to certain races of Hemileia vastatrix, the causal agent of leaf rust, or genetic linkage between resistance alleles to both pathogens. To validate this hypothesis, 63 coffee plants in F2 generation were evaluated for resistance to 2 isolates of H. vastatrix carriers of alleles, respectively, v2, v5 (isolate I/2015) and 1; v2; v5 (isolate II/2015) with the objective to confirm presence of SH1 allele in resistant plants to isolate I/2015. The same coffee plants were evaluated for resistance to a mixture of P. syringae pv. garcae strains highly pathogenic to coffee. Results showed that, among F2 coffee allele SH1 carriers, resistant to isolate I/2015, resistant and susceptible plants to bacterial halo blight were found; the same segregation occurs between F2 homozygous for SH1 allele, susceptible to the same isolate (I/2015) of H. vastatrix. Results also indicate that there is no pleiotropic effect of gene or allele SH1 connection between genes conferring resistance to leaf rust caused by H. vastatrix and bacterial halo blight caused by P. syringae pv. garcae.Item Durabilidade da resistência à ferrugem de cafeeiros portadores do gene SH3(Embrapa Café, 2015) Braghini, Masako Toma; Fazuoli, Luiz Carlos; Guerreiro Filho, Oliveiro; Mistro, Júlio César; Eskes, Albertus BernardusAntes da constatação da ferrugem alaranjada do cafeeiro (Hemileia vastatrix Berk. et Br.) no Brasil, o Instituto Agronômico de Campinas (IAC/APTA) introduziu, em 1953 e 1965, cafeeiros portadores de fatores genéticos de resistência vertical SH1, SH2, SH3 e SH4 oriundos da Índia e da África. Com o surgimento da raça II (v5) em 1970, as cultivares plantadas na ocasião, Bourbon, Mundo Novo e Catuaí portadoras do alelo SH5, mostraram-se suscetíveis à doença. A partir daquele ano, realizaram-se muitos cruzamentos entre os materiais indianos, africanos e brasileiros com o intuito de desenvolver cultivares resistentes à ferrugem. Os híbridos obtidos de porte alto e os de porte baixo foram plantados no município de Campinas, em 1972. Após alguns anos, surgiram novas raças fisiológicas com genes de virulência capazes de anular a resistência que os alelos SH1, SH2 e SH4 proporcionavam aos cafeeiros com estes genes. A partir de 1992, iniciaram-se as avaliações em relação à resistência destes materiais genéticos. O presente trabalho objetivou conhecer a evolução da doença e também caracterizar a constituição genética dos cafeeiros híbridos F1 desses experimentos. Constatou-se que, após 45 anos do surgimento da doença no Brasil, o alelo SH3 é o único gene ainda não superado pelo fungo nesses materiais. Dentre as introduções, as seleções BA 21 (IAC1107) e BA 10 (IAC 1110) da Índia, ainda continuam resistentes às raças de ferrugem presentes no Brasil. As progênies IAC 1110-8-5, IAC 1110-10 e IAC 1110-10-1 comportaram-se como homozigotas (SH3SH3) e as progênies IAC 1107-4, IAC 1107-4-1 e IAC 1107-5-6 como heterozigotas (SH3sh3) para essa característica. Atualmente, já foram desenvolvidas no país, cultivares e linhagens altamente produtivas portadoras do alelo SH3 e imunes às raças de ferrugem presentes nas plantações de café e apresentando baixa porcentagem de grãos do tipo concha. No IAC, está na fase final, a obtenção de duas cultivares de café (Catuaí SH3SH3 e Mundo Novo SH3SH3), portadoras do gene SH3 em homozigose.