COMPARING ECONOMICAL COEFFICIENTS TO SELECT THE BEST OPTIMUM SELECTION INDEX IN PEANUT

M. Saeidnia, H. Emami, R. Honarnejad, M. Esfahani

Abstract


In order to appointment desirable indices to select dominant genotype, an experiment with 40 peanut varieties was conducted in 2007 in a Randomized Complete Block Design with three replications at the Tobacco Research Institute, Rasht, Iran. For formation of selection indices, traits were selected by means of stepwise regression. In this study, we used optimum indices. Economic weights that we used included unit, phenotypic correlation, genotypic correlation, heritability, direct effects in path analysis and first factor loading in factor analysis. Results showed that if we use unit coefficient for optimum selection index, we would have the highest genetic advance for all traits among all selection indices. In addition, this selection index had high correlation with genotypic worth. Evaluating selecting index efficiency for oil percentage at the index base, compare with direct election of trait showed that if we use this selection index, respond to selection by selection index would be higher than respond to selection of trait. However, respond to direct selection of oil yield and grain yield will be higher than respond to selection-by-selection index. Genotypes such as 15, 29, 27, 9 and 22, had the highest index value by using this selection index respectively.

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DOI: http://dx.doi.org/10.15835/arspa.v77i1-2.7232



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