Avaliação da qualidade fisiológica de sementes de Feijão-Caupi (Vigna Unguiculata (L.) Walp.).

Abstract

The cowpea is a crop of great socioeconomic importance for the North, Northeast and Midwest regions. The objective of this work was to evaluate the physiological potential of seed of breeding lines and creole varieties based on germination and vigor. The experiment was conducted at the seed analysis laboratory of the Federal Rural University of Amazonia. The treatments were composed of ten lines of the butter variety, three creole butter varieties and one commercial cultivar (BR2 Bragança). The variables analyzed were: water content, weight of one thousand seeds, first germination count, standard germination test, germination speed index and mass electrical conductivity for 2, 6 and 24 hours of imbibition. A completely randomized design was used, with fourteen treatments consisting of eight replicates of 50 seeds. For statistical analysis, the data, when necessary, were transformed and the means compared. There was no variation in water content, the average was around 12.6%. The weight of one thousand seeds ranged from 75.1g (CCST) to 138.8g (BR2 Bragança). Regarding germination, there was a difference between the studied materials, but all presented germination above 88%, being above the standard required by the legislation. The commercial cultivar BR2 Bragança obtained a better result in the electrical conductivity test, proving to be the most vigorous, which shows its stability as cultivar.