Assessment of the agronomic and nutritional characteristics of sorghum genotypes with and without brown midrib
Abstract
The objective was to evaluate agronomic characteristics and nutritional value of silages of sorghum genotypes without bmr mutation and carriers of bmr mutation. 14 genotypes were used, 7 conventional (BRS 655, BRS 658, BRS 659, BRS 610, Volumax, 156x947216 and 156x947030) and 7 bearers of the BMR6 gene (2014f15641, 2014f15645, 2014f15649, 2014F1561, 2014f15681 and 2014). The experimental design used was randomized blocks, with 4 blocks and 14 treatments totaling 56 experimental plots. The averages of the variables were submitted to ANOVA using SISVAR, when significant, the treatments were compared using the Scott-Knott test at a 5% probability level. There was difference (p<0.05) for flowering days and height between genotypes. As for crude protein, average levels ranged from 11.10 to 14.66% for 2014F15645 and BRS 610. Regardless of the mutation, there was no difference (p>0.05) between the genotypes carrying the mutation and those not carrying the lignin and in situ dry matter digestibility. The BRS 655, BRS 658, BRS 659, BRS 610, VOLUMAX, 2014F15645, 2014F15649, 2014F15661, 2014F15681 and 2014F15685 genotypes are more suitable for silage production, with higher dry matter production. Regarding DISMS all genotypes can be used for silage production.
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References
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