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 germmation process, conducing to a low eficiency of shoot production. Thus, a faster and more uniform germination variety would be very interesting. íh this work, genetic parameters were considered in order to determine the aibility and velocily of emergency in the progemes of the Germoplasm Bank (Embrapa Amazônia Oriental). The experiment included twenty-eight progemes of frec polinization in an experiment of randomized bloeks design, wilii two replicates, conducted in natural conditions of bed. The germination data were used to caiculate the percentage and the average index of emergency vêiocity (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 genefie effects. Based on the genetic expect estimatives gam among the progenies. it is possihie select varieties with bettér germination process using the ability and velocity of emergency, It was aiso observed that the estimatives to IVE was more expressive.