Características morfoagronômicas de dois genótipos arroz vermelho em cultivo inundado

Abstract

Despite being virtually unknown to most Brazilians, the red rice has been grown mainly by small farmers in Northeastern Brazil. Increasing demand and the price paid for this special kind of rice leads to a need for more information about this crop. With this, the aim of this study was the comparison of morpho-agronomic characteristics of traits of red rice genotypes Vermelho Virgínia and Vermelho Pequeno with two white rice genotypes SCSBRS Tio Taka and EPAGRI109 under edaphoclimatic conditions of Seropédica, RJ. For this an experiment was installed at UFRRJ experimental field, Seropédica, RJ, Brazil, in October 2009. The experiment was in a completely randomized block design, with four treatments and five blocks. The means were compared by Student-Newman-Keuls test (5%). The genotypes Vermelho Virginia and Vermelho Pequeno had lower length of grain, but the Vermelho Virginia had thickest grain which permitted classification of its grain as a half-stretched. The genotype Vermelho Virginia had a larger height compared to genotypes of commercial white rice. The genotypes Vermelho Virginia and Vermelho Pequeno had lower yeild compared to two genotypes recommended for cultivation in flooded system.