African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6691

Full Length Research Paper

Correlations between chemistry components of caryopsis in oat genotypes cultivated in different environments

Maraisa Crestani Hawerroth
  • Maraisa Crestani Hawerroth
  • Epagri Experimental Station of Caçador, Abílio Franco, 1500, Bom Sucesso, 89500-000, Caçador, SC, Brazil.
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José Antonio Gonzalez da Silva
  • José Antonio Gonzalez da Silva
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comércio Street, number 3000, Zip Code: 98700-000 Ijuí, RS, Brazil.
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Luiz Carlos Gutkoski
  • Luiz Carlos Gutkoski
  • Cereal Laboratory, Food Research Center, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil.
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Emilio Ghisleni Arenhardt
  • Emilio Ghisleni Arenhardt
  • Department of Crop Plants, Federal University of Rio Grande do Sul, Avenue Bento Gonçalves 7712, Zip code: 91540-000, Porto Alegre, RS, Brazil.
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Antonio Costa de Oliveira
  • Antonio Costa de Oliveira
  • Department of Crop Plants, Federal University of Rio Grande do Sul, Avenue Bento Gonçalves 7712, Zip code: 91540-000, Porto Alegre, RS, Brazil.
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Fernando Irajá Félix de Carvalho
  • Fernando Irajá Félix de Carvalho
  • Department of Crop Plants, Federal University of Rio Grande do Sul, Avenue Bento Gonçalves 7712, Zip code: 91540-000, Porto Alegre, RS, Brazil.
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  •  Received: 29 June 2015
  •  Accepted: 15 October 2015
  •  Published: 19 November 2015

Abstract

The study of trait correlations can allow the identification of occurrence, intensity and direction of associations between characters, providing information to elect the most correlated to the phenotypic performance of main chemical composition components in caryopsis of oat genotypes (Avena sativa L.). Thus, this study aimed to estimate the correlation between traits of chemical composition of caryopses in oat cultivars grown in different environments. In the 2007, 2008 and 2009 seasons, 15 cultivars were grown in Augusto Pestana, Capão do Leão and Passo Fundo, Rio Grande do Sul State, Brazil, following the randomized block design with four replications, with 3.0 m2 plots. Eleven characters related to chemical composition of caryopsis were evaluated. For the set of environments, the phenotypic, genetic and environmental correlations among traits were estimated, followed by the partitioning of genetic correlations into direct and indirect effects on protein, lipid, nitrogen-free extract, and total dietary fiber content through path analysis. The results of this study suggest there is great difficulty in associating simultaneously high chemical quality of oat caryopsis - protein, lipid and total dietary fiber - with high content of carbohydrates. However, since there is no remarkable relationship, it seems to be possible to achieve high contents of β-glucan, important dietary fiber fraction, without interference of other chemical component of oat caryopsis.

 

Key words: Avena sativa L., path analysis, protein, lipid, nitrogen-free extract, total dietary fiber.