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

Stay-green effects on adaptability and stability in wheat

Henrique de Souza Luche
  • Henrique de Souza Luche
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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Jose Antonio Gonzalez da Silva
  • Jose Antonio Gonzalez da Silva
  • Department of Agrarian Studies, Regional Northwest University of Rio Grande do Sul, Comercio Street, number 3000, Zip Code: 98700-000 Ijui, RS, Brazil.
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Rafael Nornberg
  • Rafael Nornberg
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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Cristiano Mathias Zimmer
  • Cristiano Mathias Zimmer
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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Emilio Ghisleni Arenhardt
  • Emilio Ghisleni Arenhardt
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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Vanderlei da Rosa Caetano
  • Vanderlei da Rosa Caetano
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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Luciano Carlos da Maia
  • Luciano Carlos da Maia
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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Antonio Costa de Oliveira
  • Antonio Costa de Oliveira
  • Faculty of Agronomy Eliseu Maciel, Center for Genomics and Plant Breeding, Federal University of Pelotas, Zip Code: 96001-970, P. O. Box 354, Pelotas, Rio Grande do Sul, Brazil.
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  •  Received: 04 November 2014
  •  Accepted: 05 March 2015
  •  Published: 12 March 2015

Abstract

The delayed leaf senescence (stay-green) has been frequently attributed to significant yield gains in different crops, especially under stress conditions. The goal of the study was to elucidate if the delayed leaf senescence of the wheat plant through the expression of the stay-green character brings effective contributions to adaptability and stability parameters for yield and weight of a thousand grains, aiming for genetic gains in the selection of more stable and productive genotypes. The experiment was conducted on the years 2003, 2004 and 2005 under field conditions. The experimental design was random blocks with three repetitions involving lines selected for high grain yield and distinct maturation groups (presence and absence of stay-green). The delayed leaf senescence in wheat had a strong contribution on the stability and increment in grain yield, especially in unfavorable years due to reduced precipitation. However, no changes were detected for the character weight of a thousand grains. Therefore, the introduction of the stay-green character into elite lines and cultivars represent a promising strategy for more stable and higher yielding wheat genotypes.

 

Key words: Triticum aestivum L., delayed senescence, grain yield, weight of thousand grains.