Crop Breeding and Applied Biotechnology
URI permanente para esta coleçãohttps://thoth.dti.ufv.br/handle/123456789/12091
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Item Genotypic variability of rooting capacity in Coffea arabica L. cuttings(Crop Breeding and Applied Biotechnology, 2002) Sera, Tumoru; Fadelli, SérgioCutting propagation of coffee trees has been used for several years in Coffea canephora because of the advantages of this technique compared to seed propagation. Recently, the production of heterotic arabic coffee hybrid genotypes increased the importance of conventional and biotechnological cloning also for C. arabica. Two experiments were carried out to assess cutting rooting of several C. arabica genotypes. In greater detail, the potential of two types of cutting of several hybrid genotypes compared to C. canephora genotypes was investigated. The experiment was carried out under shading with automatic misting in boxes of partially burnt rice husks during the summer months. There is genetic variability for cutting rooting capacity among the C. arabica genotypes. The F1 hybrids tended to perform better than the lines. Single-node soft-wood cuttings were superior to the tip cuttings. Selection only for cutting rooting characteristics and useable cuttings resulted in efficient selection especially among single-node soft-wood cuttings. In spite of the large observed difference between the cutting production of C. arabica and C. canephora, in some cases C. arabica genotypes can be obtained with rooting performance very close that observed in C. canephora.Item Coffee Genetic Breeding at IAPAR(Crop Breeding and Applied Biotechnology, 2001) Sera, TumoruThis paper introduces the coffee genetic breeding research program developed by IAPAR (Agronomic Institute of Paraná, Brazil) which started in 1973. The characteristics of a breeding program for a seed-propagated perennial plant with a biennial production and the difficulties in assessing yield and longevity due to the time limitations they impose on the development and release of commercial cultivars are presented. A concise diagnosis of the arabica coffee crop in the region and the cultivar management and developmental strategies and priorities within the “IAPAR Model for dense population coffee crop” are detailed. The advances in cultivar development and management, integrated with other technologies for the solution of main problems are discussed and, an array of alternative procedures, techniques, methods and strategies to reduce the coffee cultivar development time from 24 to 12 years are proposed.Item Selection of Arabic coffee progenies with rust resistance(Crop Breeding and Applied Biotechnology, 2014-06) Shigueoka, Luciana Harumi; Sera, Gustavo Hiroshi; Sera, Tumoru; Fonseca, Inês Cristina de Batista; Mariucci Junior, ValdirThe aim of this study was to select high-yielding coffee progenies with resistance to coffee leaf rust for the State of Paraná (Brazil). Field experiments in a randomized block design were carried out in Itaguajé and Congonhinhas. Yield, vegetative vigor and rust resistance of nine progenies of Arabic coffee and three check cultivars were evaluated. Many genotypes derived from “Sarchi- mor” and “Catucaí” were susceptible. Three coffee genotypes of Sarchimor germplasm and the F 6 generation of genotype “Catuaí x (Catuaí x BA-10 coffee)” were selected to advance generations and are promising to become new cultivars for being higher-yielding than ‘IAPAR 59’ and ‘Tupi IAC 1669-33’ and having a large number of plants with complete rust resistance.