Evaluación de cultivares de arroz (Oryza sativa L.) bajo condiciones de secano y riego. Panamá. 2002-2003

The stability and other characteristics of 20genotypes of rice, grown under dry-land and irrigationconditions, were evaluated. Statistical analyses wereconducted (AMMI and Biplot GGESREG) to estimatestability. For the dryland system, there were differences inyield, excelling FLAR 54-00, 38 IDIAP and Lajas 02-00.Total yield fluctuated between 61.8 and 68.0%, entire grainsbetween 43.6 and 56.5% and the white center between 1.5 and3.4%. The alkaline digestion showed ten genotypes withdegrees of dispersion between six and seven with lowtemperature of gelatinización, eight with degrees from 4 to 5considered intermediate. FLAR 54-00 responded better to theenvironmental. Prosequisa, CHI 32-10 and CHI 45-23 showedthe poorest behavior. The model Biplot GGESREG identifiedFLAR 54-00, FLAR 198-00 and Fedearroz 50 as stablegenotypes. For the irrigation system, statistical DMS (P