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Título: | Selection indices to identify drought-tolerant grain sorghum cultivars |
Autor: | Menezes, Cícero Beserra de Ticona-Benavente, César Augusto Tardin, Flávio Dessaune Cardoso, Mílton José Bastos, Edson Alves Nogueira, Douglas Willian Portugal, Arley Figueiredo Santos, C. V. Schaffert, Robert Eugene |
Palavras-chave: | Analytic Method Cultivar Drought Stress Drought Tolerance Genotype Geometric Mean Productivity Grain Yield Harmonic Mean Mathematical Computing Mean Productivity Nonhuman Physical Parameters Plant Parameters Sorghum Stability Tolerance Index Stress Susceptibility Index Tolerance Index Yield Index Yield Stability Index Adaptation Cluster Analysis Drought Genetics Irrigation (agriculture) Metabolism Stress, Physiological Seed Plant Season Sorghum Statistical Model Statistics And Numerical Data Sorghum Bicolor Bicolor Sorghum Bicolor Bicolor Water Adaptation, Physiological Agricultural Irrigation Cluster Analysis Droughts Genotype Models, Statistical Seasons Seeds Sorghum Stress, Physiological Water |
Data do documento: | 2014 |
Revista: | Genetics and Molecular Research |
É parte de: | Volume 13, Número 4, Pags. 9817-9827 |
Abstract: | Twenty-five cultivars of grain sorghum [Sorghum bicolor (L.) Moench] were examined under both drought stress and normal conditions in 4 experiments. In each condition, genotypes were evaluated in a factorial experiment using a randomized complete block design with 3 replications. Eight drought tolerance indices including stability tolerance index, mean productivity (MP), geometric MP, harmonic mean, stress susceptibility index, tolerance index, yield index, and yield stability index were estimated for each genotype based on grain yield under drought (Ys) and irrigated conditions (Yp). The results indicated that there were positive and significant correlations among Yp and Ys with geometric MP, MP, harmonic mean, and stability tolerance index, indicating that these factors are better predictors of Yp and Ys than tolerance index, stress susceptibility index, yield stability index, and yield index. Based on adjusted means at Yp and Ys, indices geometric MP, MP, harmonic mean, and stability tolerance index, unweighted pair group method with arithmetic mean cluster and biplot analysis, the most tolerant cultivars were ‘9929020’, ‘9929034’, and ‘N 95B’. © FUNPEC-RP. |
DOI: | 10.4238/2014.November.27.9 |
Aparece nas coleções: | Artigos |
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