Estimativas de parâmetros genéticos para a germinação de sementes de guaraná (Paullinia cupana var. sorbilis (Mart.) Ducke).

Abstract

After harvest, the guaraná seeds (Paullinia cupana var. sorbilis (Mart. Ducke) lose very fast its germination viability, showing a very low and varied germination process, conducing to a low eficiency of shoot production. Thus, a faster and more uniform germination variety would be very interesting. In this work, genetic parameters were considered in order to determine the ability and velocity of emergency in the progenies of the Germoplasm Bank (Embrapa Amazônia Oriental). The experiment included twenty-eight progenies of free polinization in an experiment of randomized blocks design, with two replicates, conducted in natural conditions of bed. The germination data were used to calculate the percentage and the average index of emergency velocity (IVE). The genetic and environmental variance, the herdability and the "b" index estimatives showed that the highest part of the variation among the progenies was due to the genetic effects. Based on the genetic expect estimatives gain among the progenies, it is possible select varieties with better germination process using the ability and velocity of emergency. It was also observed that the estimatives to IVE was more expressive.