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

Comparison of stability methods in elephant-grass genotypes for energy purposes

Avelino dos Santos Rocha
  • Avelino dos Santos Rocha
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Rogério Figueiredo Daher
  • Rogério Figueiredo Daher
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Geraldo de Amaral Gravina
  • Geraldo de Amaral Gravina
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Antônio Vander Pereira
  • Antônio Vander Pereira
  • Embrapa Gado de Leite/Juiz de Fora, MG, Brazil.
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Erina Vitório Rodrigues
  • Erina Vitório Rodrigues
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Alexandre Pio Viana
  • Alexandre Pio Viana
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Vanessa Quitete Ribeiro da Silva
  • Vanessa Quitete Ribeiro da Silva
  • Emprapa Agrossilvipastoril/Sinop, MT, Brazil.
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Antônio Texeira do Amaral Junior
  • Antônio Texeira do Amaral Junior
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Antônio Alonso Cecon Novo
  • Antônio Alonso Cecon Novo
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Maria Lorraine Fonseca Oliveira
  • Maria Lorraine Fonseca Oliveira
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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Erik da Silva Oliveira
  • Erik da Silva Oliveira
  • Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brazil.
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  •  Received: 28 July 2015
  •  Accepted: 29 October 2015
  •  Published: 19 November 2015

Abstract

Elephant grass is a plant of tropical origin with high biomass-production potential that stands out today as an alternative energy source. The potential of its genotypes depends on the genotype × environment interaction. The objective of this study was to estimate the genotype × environment interaction and compare stability methods in elephant grass for biomass production in a biannual cutting regime. The experiment was conducted in a randomized block design with two replicates and evaluations of 73 elephant-grass genotypes in six cuts. The trait dry matter yield was utilized for the analysis of the genotype × environment interaction and the stability. The stability analysis methods employed were those of Yates and Cochran, Plaisted and Peterson, Wricke, Annicchiarico, Lin and Binns, and Huehn. Kang and Phan’s ranking was adopted for all the methods. Spearman’s coefficient was utilized to evaluate the degree of agreement between the different methods employed. Significant differences were observed for the genotype × environment interaction. Non-parametric Lin and Binns’ and Annicchiarico’s methods were more discriminating than the analysis of variance methods in the evaluation of stability and productivity of the tested genotypes.

 

Key words: Pennisetum purpureum, energy alternative, biomass production, genotype by environment interaction.