Características agronômicas e nutricionais de genótipos de sorgo portadores ou não de nervura marrom

Abstract

The objective of this study was to evaluate the agronomic characteristics and nutritional value of normal sorghum genotypes (without bmr mutation) and with the bmr mutation. Fourteen sorghum genotypes were used: 7 genotypes of the genus genotypes (BRS 655, BRS 658, BRS 659, BRS 610, VOLUMAX, 156x947216 and 156x947030) and 7 mutants of the bmr6 gene (2014F15641, 2014F15645, 2014F15649, 2014F15653, 2014F15661, 2014F15681 and 2014F15685). The experimental design was a randomized block design with 4 blocks and 14 treatments totaling 56 experimental plots. The means of the variables were submitted to analysis of variance by means of the SISVAR and when they were significant there was a comparison of the treatments using the Scott-Knott test at 5%. There was a difference (p 0.05) between the mutation carriers and the non-carriers for lignin and potentially digestible dry matter. For neutral detergent fiber there was no difference (p> 0.05) and the mean was 66.12%. The average pH of the silages was 4.16. The genotypes 2014F15685 and 2014F15645 are the most suitable for silage production, since they presented higher production of dry matter that could be digestible.