African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Estimates of genetic parameters in F4 – F5 soybean populations resistant to Asian soybean rust

Kauê Charnai
  • Kauê Charnai
  • Department of Plant Production, University of Agricultural Science and Veterinary, Jaboticabal, Brazil
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Antonio Orlando Di Mauro
  • Antonio Orlando Di Mauro
  • Department of Plant Production, University of Agricultural Science and Veterinary, Jaboticabal, Brazil
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Silviane de Santiago
  • Silviane de Santiago
  • Department of Plant Production, University of Agricultural Science and Veterinary, Jaboticabal, Brazil
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Viviane Formice Vianna
  • Viviane Formice Vianna
  • Department of Plant Production, University of Agricultural Science and Veterinary, Jaboticabal, Brazil
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Lucas Tadeu Mazza Revolti
  • Lucas Tadeu Mazza Revolti
  • Department of Plant Production, University of Agricultural Science and Veterinary, Jaboticabal, Brazil
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Marcelo Marchi Costa
  • Marcelo Marchi Costa
  • Dow Agrosciences, Jardinópolis, Brazil
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  •  Received: 23 January 2014
  •  Accepted: 24 March 2014
  •  Published: 10 April 2014

Abstract

The objective of the present study is the evaluation of genetic parameters in F4 and F5 soybean populations from two crosses, which are potentially resistant to Asian soybean rust. The genotypes were developed from the cross between parents, which were resistant and susceptible to the disease, and totaled 137 genotypes in generation F4 and 283 genotypes in F5. The experimental design was augmented blocks with two checks between the treatments. The following agronomic characters were evaluated: plant height at maturity, first pod insertion height, number of nodes and branches, agronomic value, lodging, number of pods and seeds per plant and seed production. After the genotypes were submitted to analyses of variance, heritability, and selection gains, it was observed that Cross 1 had superior progenies, which were potentially resistant to Asian soybean rust and also had good productivity.

 

Key words: Glycine max, genetic improvement, heritability, selection gains, productivity.