Resumen
- A greenhouse experiment was conducted to understand the genetic control of rice traits for competing favorably with an intersown grass pasture. Based on Fischer et al. (1995) work, it was possible to identify 7 parental lines with different competition capabilities. These lines were crossed using a diallel without reciprocal crosses, what resulted in 21 hybrid combinations. These 28 materials were grown in pots in the greenhouse, in a randomized complete block design with 3 replications, in monocrop and in association with Brachiaria brizantha. Forty five days after planting the following data were collected on rice: plant height, number of tillers, leaf area, and biomass of shoots and roots. The analysis was done using the Hayman model (Hayman. 1954), and further analyses are under way using the Griffing model (Griffing, 1956) and the Hallauer and Miranda (1981) approach.