André Dominghetti Ferreira

Correlação entre crescimento e produtividade de cultivares de café em diferentes regiões de Minas Gerais, Brasil

The objective of this work was to evaluate coffee growth traits in the initial stages of development and to determine its correlation with the crop initial yield in different environments. Twenty-two cultivars resistant to rust and three susceptible ones were evaluated in five representative coffee growing localities in the state of Minas Gerais, Brazil. The experiment was carried out from 2005 to 2008 in a randomized complete block design with three replicates. Besides initial yield, five growth traits were evaluated 12 months after planting: stem diameter, number and length of plagiotropic branches, plant height, and number of nodes. The genotypic and phenotypic correlations were evaluated for all traits. Pau Brasil MG1 and Catuai Amarelo IAC 62 cultivars show superiority in at least four out of the five evaluated characters, in all growing localities. There is a positive correlation between initial yield and the evaluated growth traits, except number of nodes.

Eficiência na seleção de progênies de cafeeiro avaliadas em Minas Gerais

The present work had the aim of verifying the selection efficiency of coffee plants originated from the crossing between Catuai and Icatu with Timor Hybrid. Eighteen progenies developed by the Program of Genetic Improvement of Epamig/UFLA/ UFV were evaluated. Coffee plants were planted in December 2005 in the following counties: Lavras, Campos Altos and Patrocinio, in the State of Minas Gerais. The characteristics analyzed were: productivity, grain size and proportion of cherry fruit. In order to verify the efficiency of the selection, the index of coincidence was applied according to the methodology of Hamblin and Zimmermann (1986), as well as the magnitude of the interaction progenies x environments and its decomposi - tion in simple and complex parts using the methodology of Cruz and Castoldi ( 1991). The predominance of the complex part in relation to the simple one in the interaction of the progenies x environments confirms the low or absence coincidence of the progenies in different environments, raising difficulties for a general recommendation for different coffee regions in the State of Minas Gerais.

Seleção de progênies do cruzamento entre cultivares de cafeeiros Icatu e Catuaí

Breeding programs should be dynamic and continuous in order to provide new coffee cultivars with complex resistance factors to be efficient barriers to new physiological races of the fungus H. vastatrix. In this context, the objective of this work was to evaluate the agronomic performance, the resistance to rust and the occurrence of brown eyespot in progenies derived from crosses between Catuai and Icatu groups in two sites in the State of Minas Gerais. The experiments were carried out on EPAMIG Experimental Farms situated in Sao Sebastiao do Paraiso and Tres Pontas, State of Minas Gerais, Brazil. The experimental design was a 6 x 6 lattice square with three replications. The following characteristics were evaluated in the 2009/2010 and 2010/2011crop years in both sites: yield, vegetative vigor, percentage of grain size and response to rust and brown eyespot. Performance of the evaluated progenies for productivity in Tres Pontas was higher than in Sao Sebastiao do Paraiso. The progeny 6-47-10 H Hole 3 stood out among the most promising, suggesting good potential for genetic progress in selection. Progenies with resistance to rust were classified.