Abstract
This study aimed to predict breeding values and estimation of variance components for growth traits, disease incidence and timing of the production of half-sib progenies of guarana in an experiment conducted in Maues, Amazonas. Thirty-six families were evaluated in an experimental design of randomized blocks with two replications and six plants per plot for the characters plant height and stem diameter (cm), anthracnose resistance and witches (scale 0-4) and fruit production (g / plant). The variance components and genetic parameters were estimated by the procedure REML / BLUP. All characteristics are greatly influenced by the environment. The greatest genetic gain for early production are obtained with the selection of subjects using both the variation between and within the progeny combined through BLUP. The average of the first production of the best individual was 7720 g / plant, which is five times higher than the state average productivity. The largest genetic gains are the characteristics plant height, stem diameter, and early production. Selection for resistance to anthracnose and witches will be more efficient if performed at the level of progeny and not between individuals within progenies.
Highlights
O guaranazeiro (Paullinia cupana Kunth var. sorbilis (Mart.) Ducke, Sapindaceae) é importante economicamente e socialmente, na Amazônia e no Estado da Bahia
Thirty-six progenies were evaluated in a randomized complete block design with two replications and six plants per plot for plant height and stem diameter, resistance to anthracnose and sprouting (0 to 4 scale), and precocious yield (g/plant) in 24 month old plants
All the characteristics are strongly influenced by the environment
Summary
Componentes de variância, parâmetros genéticos e fenotípicos dos caracteres altura de plantas, diâmetro do caule, antracnose, superbrotamento e produção inicial, estimados em 36 progênies de meios irmãos de guaranazeiro aos 24 meses após o plantio, em Maués, Amazonas. A altura das plantas e o diâmetro do caule (cm), a resistência à antracnose e ao superbrotamento (escala de severidade de incidência de 0 a 4) (PEREIRA et al, 2005a), e a produção inicial de frutos por planta (g) foram avaliados aos 24 meses após o plantio. O maior valor de herdabilidade da média de progênies foi verificado para o diâmetro do caule, seguida da altura das plantas. O maior valor de herdabilidade individual no sentido restrito foi verificado para o diâmetro do caule. A acurácia da seleção de progênies foi maior para o caráter diâ-
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