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      Avaliação de progênies obtidas de cruzamentos de descendentes do Híbrido de Timor com as cultivares Catuaí Vermelho e Catuaí Amarelo Translated title: Evaluation of coffee progenies from crosses of Catuaí Vermelho and Catuaí Amarelo with "Hibrido de Timor" descents

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          Abstract

          Avaliou-se com este trabalho o comportamento de 28 progênies F3 de Coffea arabica obtidas de cruzamentos das cultivares Catuaí Vermelho e Catuaí Amarelo com descendentes do Híbrido de Timor, realizados pela Epamig em conjunto com a UFV. Estimaram-se os parâmetros genéticos e as correlações entre caracteres, buscando conhecer a estrutura genética da população e seu potencial para o melhoramento. O experimento foi instalado em Patrocínio, Estado de Minas Gerais, em delineamento de blocos casualizados com seis repetições, contendo 28 progênies F3 e duas testemunhas da cultivar Catuaí Vermelho IAC 15. Analisaram-se as produções obtidas nas quatro colheitas iniciais, de 1997 a 2000 e alguns caracteres vegetativos. As progênies avaliadas apresentaram média de produção de grãos superior à testemunha, e grande variabilidade genética, sugerindo a possibilidade de se obter linhagens superiores. As progênies avaliadas apresentaram-se resistentes às raças fisiológicas da ferrugem presentes na região do experimento. A progênie 505-9-2 se destaca como material produtivo e vigoroso e de porte alto, enquanto as progênies 514-7-10 e 514-7-6 além de produtivas e vigorosas apresentaram porte baixo semelhante à cultivar Catuaí Vermelho IAC 15. A produção de grãos apresentou correlação genotípica alta e positiva com os caracteres diâmetro do caule, vigor, porte, altura e diâmetro da planta, mas não apresentou resultados consistentes de correlação com carga pendente. A produção de grãos de anos de colheita mostrou-se correlacionada com a produção total de quatro anos apenas a partir do segundo ano de produção.

          Translated abstract

          This research aimed to evaluate the behavior of twenty eight F3 progenies of arabica coffee obtained from crosses between Catuaí cultivar and the Híbrido de Timor descents, done by Epamig in association with UFV. Genetic parameters and correlation coefficients among agronomic traits were estimated in order to know the genetic structure and the potential of the population for breeding programs. The experiment was set up in Patrocínio (MG), using randomized block design. Yields of first initial harvests (from 1997 to 2000) and some vegetative traits were analyzed. The progenies presented average yield of coffee beans higher than the control and a high genetic variability, suggesting the possibility of obtaining superior inbred lines. The progenies evaluated were resistant to the races of leaf rust present in the field. The progeny 505-9-2 is productive, vigorous and tall, while the progenies 514-7-10 and 514-7-6 are productive, vigorous and dwarf, similar to the Catuaí cultivar. Bean yield showed high positive genotypic correlations with plant vigor, plant size, plant height, stem diameter and plant diameter. Annual yields showed to be correlated with total yield of four years only after the second productive year.

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          Most cited references24

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          Programa Genes – versão Windows: aplicativo computacional em genética e estatística.

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            Genetic diversity for RAPD markers between cultivated and wild accessions of Coffea arabica

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              Detection of genetic diversity and selective gene introgression in coffee using RAPD markers.

              RAPD (randomly amplified polymorphic DNA) markers generated by arbitary decamers have been successfully employed to detect genetic polymorphisms between coffee species and between Coffea arabica genotypes. The RAPD profiles were used to construct dendrograms and these were consistent with the known history and evolution of Coffea arabica. Material originating from Ethiopia and the arabica sub-groups - C. arabica var. typica and C. arabica var. bourbon - were clearly distinguished. RAPD analysis therefore reflects morphological differences between the sub-groups and the geographical origin of the coffee material. Species-specific amplification products were also identified, but, more importantly, amplification products specific to C. canephora were identified in two C. arabica genotypes, Rume Sudan and Catimor 5175. This diagnostic product is therefore indicative of interspecific gene flow in coffee and has biological implications for selective introgressive hybridisation in coffee. Our study demonstrates the power of the polymerase chain reaction technology for the generation of genetic markers for long-lived perennial tree and bush crops.
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                Author and article information

                Journal
                brag
                Bragantia
                Bragantia
                Instituto Agronômico de Campinas (Campinas, SP, Brazil )
                0006-8705
                1678-4499
                2004
                : 63
                : 2
                : 207-219
                Affiliations
                [01] Itapetininga BA orgnameUniversidade Estadual do Sudoeste da Bahia orgdiv1Departamento de Estudos Básicos e Instrumentais pbonomo@ 123456uesb.br
                [02] Viçosa MG orgnameUniversidade Federal de Viçosa orgdiv1Departamento de Biologia jmsviana@ 123456mail.ufv.br
                [03] Viçosa MG orgnameEmpresa de Pesquisa Agropecuária de Minas Gerais pereira@ 123456ufv.br
                [04] Brasília DF orgnameEmbrapa Hortaliças valter@ 123456cnph.embrapa
                Article
                S0006-87052004000200006 S0006-8705(04)06300206
                42daf245-a355-488a-b725-4586b0c9cb92

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

                History
                : 20 February 2004
                : 18 February 2003
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 36, Pages: 13
                Product

                SciELO Brazil

                Categories
                Melhoramento Genético Vegetal

                Coffea arabica L.,café,melhoramento do cafeeiro,Híbrido de Timor,breeding,genotypic correlations

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