STABILITY EVALUATION OF 15 CORN HYBRIDS AMONG 10 ENVIRONMENTS OF AZUERO REGION. PANAMA. 2003.
A trial was carried out among 10 environments of Azuero Region, with the objective of selecting the hybrids with the best adaptability and stability. The genetic pool of this experiment consisted in 15 white and yellow corn hybrids. A Complete Randomized Block Design with three replications was used; the experimental plots consisted by two rows of 5.2 m of length, separates by 0.8 m. A combined analysis of variances was done and the means were separated by the Least Significant Differences (LSD). To estimate adaptability and stability of hybrids and environments, it was used the Additive Main Effects and Multiplicative Interaction (AMMI) and GGE Biplot technique (Genotype plus Genotype-Environment interaction). The agronomic management was based by IDIAP integrated corn mechanized management recommendation. It was applied 200 kg N/ha in three splits. The first application was at the planting moment (227 kg 13-26-6-7/ha), the second application at 21 days after planting (dap) and the last one at 37 dap (159 and 204 kg/ha, respectively). The statistical analysis indicated significant differences (P<0.01) among genotypes, environments and the genotype-environment interaction, indicating the differential response of hybrids in front of the different environments. The hybrid group formatted by C-8003, C-8007, PB-013 and PB-0105 outstanding by its high yield and well agronomics characteristics throughout all environments. The hybrids CLRCYX-13, 30R92, X-1358K CLRCYX-19 and 30F-80 followed this group, with yields higher than 7 t/ha. The stability analysis identified C-8003 and C-8007 like the most stables. The grain yield of this year increased in more than one tons the average of four previous years. This yield increment could be attributed to nitrogen fertilization adjustment, due to previous project researches. The rainfall analysis of this year in the crop development defined two localities groups according to water stress suffered in grain filled phase.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | spa |
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Instituto de Innovación Agropecuaria de Panamá
2004
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| Online Access: | http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/221 |
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| Summary: | A trial was carried out among 10 environments of Azuero Region, with the objective of selecting the hybrids with the best adaptability and stability. The genetic pool of this experiment consisted in 15 white and yellow corn hybrids. A Complete Randomized Block Design with three replications was used; the experimental plots consisted by two rows of 5.2 m of length, separates by 0.8 m. A combined analysis of variances was done and the means were separated by the Least Significant Differences (LSD). To estimate adaptability and stability of hybrids and environments, it was used the Additive Main Effects and Multiplicative Interaction (AMMI) and GGE Biplot technique (Genotype plus Genotype-Environment interaction). The agronomic management was based by IDIAP integrated corn mechanized management recommendation. It was applied 200 kg N/ha in three splits. The first application was at the planting moment (227 kg 13-26-6-7/ha), the second application at 21 days after planting (dap) and the last one at 37 dap (159 and 204 kg/ha, respectively). The statistical analysis indicated significant differences (P<0.01) among genotypes, environments and the genotype-environment interaction, indicating the differential response of hybrids in front of the different environments. The hybrid group formatted by C-8003, C-8007, PB-013 and PB-0105 outstanding by its high yield and well agronomics characteristics throughout all environments. The hybrids CLRCYX-13, 30R92, X-1358K CLRCYX-19 and 30F-80 followed this group, with yields higher than 7 t/ha. The stability analysis identified C-8003 and C-8007 like the most stables. The grain yield of this year increased in more than one tons the average of four previous years. This yield increment could be attributed to nitrogen fertilization adjustment, due to previous project researches. The rainfall analysis of this year in the crop development defined two localities groups according to water stress suffered in grain filled phase. |
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