Evaluation of cultivated of rice (Oryza sativa L.) under conditions of dry land and irrigation. Panamá. 2002-2003.
Keywords:Rice, genotype, yield, stability, evaluation of cultivars, Biplot GGE.
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.
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