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      IAC Catuaí SH3 - a dwarf Arabica coffee cultivar with leaf rust resistance and drought tolerance

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          Abstract

          Abstract The 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.

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          Melhoramento visando a resistência do cafeeiro à ferrugem

          A ferrugem alaranjada, uma das mais graves moléstias do cafeeiro, ainda não foi observada no continente americano. Com a mais freqüente e rápida ligação entre os países africanos e o Brasil, tem aumentado consideràvelmente o perigo de introdução neste continente. No presente trabalho, são fornecidos elementos sôbre a especialização fisiológica da H. vastatrix,fontes de resistência ao fungo, hereditariedade dessa resistência e dados já obtidos sôbre os fatôres de resistência que ocorrem nos cafeeiros existentes no Instituto Agronômico, em Campinas. Apresentam-se também as diretrizes para o prosseguimento do plano de melhoramento visando a obtenção de linhagens portadoras de fatôres genéticos que lhes proporcionem resistência ao maior número possível de raças da ferrugem.
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            Rust resistance in Arabic Coffee cultivars in northern Paraná

            The objective of the study was to evaluate the resistance to rust in coffee cultivars developed by research institutes of Brazil in Paraná state. Resistance to the local leaf rust races was assessed in high disease intensity field conditions at Londrina and Congonhinhas in 2009 and 2010.The cultivars were developed by the EPAMIG/UFV, IAPAR, IAC and MAPA/Procafé. The resistant standard 'IAPAR 59' and the susceptible standards Catuaí Vermelho IAC 144' and 'Bourbon Amarelo' were used. A randomized block design with three replications and plots with 10 plants was used. A scale from 1 to 5 based on the rust intensity was used to evaluate the resistance. The Catiguá MG 1, Catiguá MG 2, IAPAR 59, IPR 98, IPR 104, Palma II, Paraíso H-419-10-6-2-5-1, Paraíso H-419-10-6-2-10-1, Paraíso H-419-10-6-2-12-1, Pau Brasil MG 1 and Sacramento MG 1 cultivars presented complete resistance to rust at Londrina and Congonhinhas. The cultivars derived from the Catucaí germplasm were susceptible or showed different levels of partial resistance. Partial resistance to the rust was observed in several coffees derived from "Hibrido de Timor". 'Acauã' and 'Obatã IAC 1669-20' presented complete resistance at Londrina, but at Congonhinhas, they were partially resistant, indicating that different rust races have occurred at these two locations.
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              Coffea arabica clones resistant to coffee leaf miner

              Abstract Brazilian 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.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                cbab
                Crop Breeding and Applied Biotechnology
                Crop Breed. Appl. Biotechnol.
                Crop Breeding and Applied Biotechnology (Viçosa, MG, Brazil )
                1518-7853
                1984-7033
                September 2019
                : 19
                : 3
                : 356-359
                Affiliations
                [1] Campinas São Paulo orgnameInstituto Agronômico de Campinas Brazil
                Article
                S1984-70332019000300356
                10.1590/1984-70332019v19n3c48
                51258eb4-9e7e-48ba-be2e-bf7e6dd497f3

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 18 October 2018
                : 19 June 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 9, Pages: 4
                Product

                SciELO Brazil

                Categories
                Cultivar Release

                durable resistance,cup quality,Hemileia vastatrix,Coffea arabica

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