Ewerton Gewehr

Variabilidade genética na busca de eficiência à produção de sementes e biomassa de capim Sudão

The objective of the study was to investigate the genetic variability of characters linked to inflorescence in populations of Sudan grass and the contribution of these variables in defining the most effective trait selection for seed yield. In addition, to provide subsidies to indicate that the selection pressure on the components of panicle to increase seed production does not compromise the character of forage interest. The experiments were conducted in the years 2009 and 2010 in the selection of plants for the characters tillering, biomass production and making up the inflorescence of the species. It was verified that there is genetic variability among populations of Sudan grass, especially in the mass character of panicle, number of grains in panicle and grain weight, variables of greatest contribution on the morphological differences observed in the inflorescence. Correlations were obtained for the effective mass of panicle and number of grains in panicle and increase in grain weight of panicle. The selection pressure on these characters does not bring harm on biomass and tillering.