Agronomic And Phenolic Characterization Of Irrigated Rice Genotypes To Determine Variety Mixture

Abstract

This work’s objective was to identity similar genotypes within agronomic and phenolic characteristics to form a variety mixture. The experiment was performed at Federal University of Tocantins at Gurupi (Universidade Federal do Tocantins, Gurupi). The factorial scheme used was entirely random (DIC - Delineamento inteiramente casualizado), with three repetitions. The experiments consisted of 37 irrigated rice genotypes. The evaluated characteristics were: germination, flowering, plant eight, panicle weight, panicle length, 100 grain weight, grain form, grain class, arista presence, and husk color. The results were submitted to variance analysis and the averages were evaluated by Scott-Knott grouping test at 5% probability and multivariety analysis. There was evidence of considerable difference on the majority of studied characteristics, thus indicating variety among genotypes. Genotype Irri 344 reached flowering at 74 days after sowing, followed by genotypes Javaé and Irga 417 with 79 days. The genotype Eloni, and Mutante were in the latest cycle. The tallest genotypes were: Tetep with 131.3 cm (51.7 inches); and Basmati 128,3 (50.5 inches) The majority of genotypes were classified as long-fine. On the multivariety analysis, seven groups were arranged. Flowering was the most influencing characteristic in grain determination, except for group one (1) which was composed by Tetep and Basmati genotypes, which were also separated by eight. Genotypes CNAI 5287, CNAI 9930 and Irri 344 were not included in any group, because their grain characteristics displayed higher dissimilarity in relationship to the other groups.