Ciclo precoce de maturação e produtividade em genótipos de café derivados de C1195-5-6-2
Data
2017-10
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Editor
Editora UFLA
Resumo
O objetivo nesse estudo foi identificar cafeeiros com ciclo de maturação precoce e muito precoce com alta produtividade, em progênies de café arábica portadoras de genes de C. racemosa. O experimento de campo foi instalado no IAPAR, em setembro de 2007, em Londrina, PR, Brasil. O delineamento experimental foi em blocos ao acaso, com três repetições e parcelas de cinco plantas no espaçamento de 2,5 x 0,5 m. Foram avaliadas 17 progênies F1RC6 derivadas de retrocruzamentos de diferentes genótipos de café arábica com uma planta F2 do genótipo C1195-5-6-2. Como padrões comparativos foram utilizadas as cultivares IAPAR 59, IPR 99 e Catuaí Vermelho IAC 81 que possuem, respectivamente, ciclos de maturação semiprecoce, semitardio e tardio. Foram avaliadas as características produtividade vigor vegetativo e ciclo de maturação. As avaliações de maturação e vigor foram realizadas através de escala de notas e a produtividade em volume de frutos. As progênies H0509, H0501, H0518, H0513, H0508, H0510, H0505, H0506, H0514 e H0504 foram mais precoces do que seus parentais. Entre elas, as progênies H0518, H0507 e H0508 foram mais produtivos do que as testemunhas e não diferiram estatisticamente quanto ao vigor vegetativo. Foram identificadas 10 progênies F1RC6 de café arábica, portadoras de genes de C. racemosa com potencial para se tornarem cultivares com ciclo precoce e muito precoce. A característica de ciclo precoce de maturação dos frutos de C. racemosa, presente no C1195-5-6-2, permaneceu após os diversos ciclos de cruzamento com C. arabica.
The aim in research study was to identify coffee plants with early and very early ripening cycle with high yield in Arabica coffee progenies carriers of C. racemosa genes. The field trial was carried out on IAPAR in September 2007 in Londrina, PR, Brazil. The experimental design was a randomized blocks design with three replicates and five plants per plot in the spacing of 2.5 x 0.5 m. We evaluated 17 F 1 RC 6 progenies derived from backcrosses of different Arabica coffee genotypes with a F 2 plant of the genotype C1195-5-6-2. As comparative controls were used cultivars IAPAR 59, IPR 99 and Catuaí Vermelho IAC 81 which have, respectively, semi-early, semi-late and late ripening cycles. The traits evaluated were yield, vegetative vigor and ripening cycle. The ripening cycle and vegetative vigor assessments were performed using scale grades and yield in volume of fruits. The progenies H0509, H0501, H0518, H0513, H0508, H0510, H0505, H0506, H0514 and H0504 were earlier than their parentals. Among them, the progenies H0518, H0507 and H0508 were more productive than the controls and did not differ for vegetative vigor trait. Ten F1RC6 progenies, carriers of C. racemosa genes, with potential to become cultivars with early and very early cycle were identified. The early ripening cycle trait of C. racemosa, present in C1195-5-6-2 remained after the crossing cycles of C. arabica.
The aim in research study was to identify coffee plants with early and very early ripening cycle with high yield in Arabica coffee progenies carriers of C. racemosa genes. The field trial was carried out on IAPAR in September 2007 in Londrina, PR, Brazil. The experimental design was a randomized blocks design with three replicates and five plants per plot in the spacing of 2.5 x 0.5 m. We evaluated 17 F 1 RC 6 progenies derived from backcrosses of different Arabica coffee genotypes with a F 2 plant of the genotype C1195-5-6-2. As comparative controls were used cultivars IAPAR 59, IPR 99 and Catuaí Vermelho IAC 81 which have, respectively, semi-early, semi-late and late ripening cycles. The traits evaluated were yield, vegetative vigor and ripening cycle. The ripening cycle and vegetative vigor assessments were performed using scale grades and yield in volume of fruits. The progenies H0509, H0501, H0518, H0513, H0508, H0510, H0505, H0506, H0514 and H0504 were earlier than their parentals. Among them, the progenies H0518, H0507 and H0508 were more productive than the controls and did not differ for vegetative vigor trait. Ten F1RC6 progenies, carriers of C. racemosa genes, with potential to become cultivars with early and very early cycle were identified. The early ripening cycle trait of C. racemosa, present in C1195-5-6-2 remained after the crossing cycles of C. arabica.
Descrição
Palavras-chave
Coffea arabica, Coffea racemosa, Cultivares, Melhoramento
Citação
ANDREAZI, E. et al. Ciclo precoce de maturação e produtividade em genótipos de café derivados de C1195-5-6-2. Coffee Science, Lavras, v. 12, n. 4, p. 575-582, out./dez. 2017.