The stability and other characteristics of 20

genotypes of rice, grown under dry-land and irrigation

conditions, were evaluated. Statistical analyses were

conducted (AMMI and Biplot GGESREG) to estimate

stability. For the dryland system, there were differences in

yield, excelling FLAR 54-00, 38 IDIAP and Lajas 02-00.

Total yield fluctuated between 61.8 and 68.0%, entire grains

between 43.6 and 56.5% and the white center between 1.5 and

3.4%. The alkaline digestion showed ten genotypes with

degrees of dispersion between six and seven with low

temperature of gelatinización, eight with degrees from 4 to 5

considered intermediate. FLAR 54-00 responded better to the

environmental. Prosequisa, CHI 32-10 and CHI 45-23 showed

the poorest behavior. The model Biplot GGESREG identified

FLAR 54-00, FLAR 198-00 and Fedearroz 50 as stable

genotypes. For the irrigation system, statistical DMS (P<0.05)

indicated differences in yield, standing out IDIAP 38, P-3621

and Fedearroz 50. The quality of grains showed total yield

between 65.8 – 70.9%, entire grains between 51.5 and 62.0%,

and incidence of white center between 1.2 and 2.8%. In the

alkaline digestion, nine genotypes presented degrees of six

and seven and ten with degrees from 4 to 5. IDIAP 38, P-3621

and FLAR 54-00, responded better to the environmental

stimuli. Prosequisa, FLAR 195-00, CHI 49-16 and CHI 13-

256 presented the poorest behavior. The stable genotypes

under irrigation were Fedearroz 50, 38 IDIAP and P-3621.

Keywords: Rice, genotype, yield, stability, evaluation of cultivars, Biplot GGE.