Adaptability, agronomic performance and genetic divergence of castor genotypes grown in the Cerrado-Pantanal ecotone
Abstract
Under the hypothesis of distinction and characterization of promising genotypes in the genetic improvement of castor, the aim of this work was to evaluate the agronomic performance, phenotypic adaptability and genetic divergence among castor genotypes grown in Savanna-Pantanal ecotone. The experiment was conducted in the years 2009 and 2010 in the experimental area of the State University of Mato Grosso do Sul. The treatments consisted of 7 castor genotypes (BRS Energia, IAC 2028, IAC-Guarani, BRS Nordestina, BRS Paraguaçu, IAC-80 and IAC-226) arranged in a randomized block design with three replications. Was assessed the following characters: plant height, stem diameter, number of fruits and productivity. Data were subjected to analysis of individual and joint variance and means compared by Skott-Knott test. The phenotypic stability was estimated productivity data by the method of Lins and Binns. The genetic divergence between the genotypes was determined by the methods of Ward’s and Tocher’s, having as dissimilarity measure the Mahalanobis’s distance. The genotype BRS Energia showed higher productivity and phenotypic adaptability. The crossing of this genotype with BRS Paraguaçu can obtain a hybrid with high heterosis effect, and consequently, high productivity.
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References
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