MAIZE CULTIVAR RECOMMENDATION BASED ON PHENOTYPIC STABILITY ANALYSIS
Abstract
Grain yield was used to perform a phenotypic stability analysis in maize. The yield data were obtained from a group of maize trials classified as very early, early and normal cycles. Data were analyzed within each maturity group and phenotypic stability was done using the unbalanced discontinuous bi-segmented model (STORCK, 1989). A total of` 18, 20, and 19 environments (1994/95 and 1995/96 growing seasons) and 34, 44, and 19 cultivars were used in the analysis for very early, early and normal maturity groups, respectively. Cultivars were ranked from intermediate, maximum, higher than intermediate, diverse and lower environment to not recommend. The cultivars Agromen 3050. C 969. AGX 6272, Dina 170, Dina 771, P 3063, AG 672 and AG 9023 are those that performed well in a diverse environmental conditions. The cultivars AG 9012, AG 9014, Dina'766, AG 521 and AG 951 are only recommended for environmental conditions relatéd to high yield expectation.
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