Evaluation of 73 genotypes development elephant grass at Campos dos Goytacazes - RJ

Abstract

The elephant grass has wide genetic variability reflecting in a large morphological plasticity within species. Therefore, this study aimed to evaluate the initial development of 73 genotypes of elephant grass at Campos-RJ. The characteristics studied were: plant height, number of tillers per meter and stem diameter. The experiment was conducted in a randomized block design with two replications in Pesagro Rio. Five evaluations were performed at four weeks intervals, the first of which occurred eight weeks after seeding. Data were tested for group averages, Scott Knott (1974) (P<0.01) and the regression analysis of first grade (P<0.05), allowing the grouping effect of the regression coefficients (β1). Based on the average values of the characteristics evaluated genotypes: BAGCE 2, Cuban Pinda, Vrukwona, BAGCE 51, Capim Cana D'Africa, Cuba-116, King Grass, Purple Botucatu, Cameroon, BAGCE 69, IJ 7139, 02 AD IRI , BAG BAG 86 and 87 stood out from the rest. Based on the regression coefficient was possible to separate groups of genotypes with development patterns and identify those with the next highest speed budding buds and growth translated into higher speed of establishment of capineira.

Keywords

• Pennisetum purpureum
• altura
• brotamento
• diâmetro