Rice cultivars and selected lines were evaluated as to their yielding potential and several agronomic traits in the State of São Paulo, Brazil, during the years 1990/91 and 1991/92. The cultivar IAC 101 and the line IAC 1085 showed a good yielding potential and stability, leaf and panicle blast resistance, dwarfness, lodging resistance, and high level of head rice after milling. The line IAC 1085 also showed earliness which make it proper for late planting. The cultivars IAC 238, IAC 242 e IAC 100 also showed reasonable yielding potential mainly in 1991/92. The cultivar IAC 4440 showed high susceptibility to leaf and panicle blast. The lines IAC 1091 and IAC 1231 showed high resistance to panicle blast and can be used in future breeding programs as gene sources for that attribute.
rice; Oryza sativa L.; yielding potential and stability of cultivars and breeding lines; blast resistance