African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Induction of genetic variability and plant development in palisade grass evaluated in M2 mutants

Diego Nicolau Follmann
  • Diego Nicolau Follmann
  • Federal University of Santa Maria (UFSM), Santa Maria, Brazil.
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Velci Queiróz de Souza
  • Velci Queiróz de Souza
  • Federal University of Pampa (UNIPAMPA), Dom Pedrito, Brazil.
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Maicon Nardino
  • Maicon Nardino
  • Federal University of Pelotas (UFPEL), Pelotas, Brazil.
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Ivan Ricardo Carvalho
  • Ivan Ricardo Carvalho
  • Federal University of Pelotas (UFPEL), Pelotas, Brazil.
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Denise Schmidt
  • Denise Schmidt
  • Federal University of Santa Maria (UFSM), Campus de Frederico Westphalen, Brazil.
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Daniela Meira
  • Daniela Meira
  • Federal University of Santa Maria (UFSM), Campus de Frederico Westphalen, Brazil.
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Carine Meier
  • Carine Meier
  • Federal University of Santa Maria (UFSM), Campus de Frederico Westphalen, Brazil.
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Mauricio Ferrari
  • Mauricio Ferrari
  • Federal University of Pelotas (UFPEL), Pelotas, Brazil.
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Alan Junior de Pelegrin
  • Alan Junior de Pelegrin
  • Federal University of Santa Maria (UFSM), Campus de Frederico Westphalen, Brazil.
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Vinícius Jardel Szareski
  • Vinícius Jardel Szareski
  • Federal University of Santa Maria (UFSM), Campus de Frederico Westphalen, Brazil.
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  •  Received: 24 March 2016
  •  Accepted: 02 June 2016
  •  Published: 25 August 2016

Abstract

The objective of this study was to evaluate the induction of genetic variability and plant development of palisade grass (Urochloa brizantha L.) M2 mutants in acclimatization to subtropical climate condition. The mutagenic agent methyl methanesulfonate (MMS), at a dosage of 0.5%, was used to induce mutation in 4,000 seeds of the cultivar Marandu. Thirty five plants survived after the induction of MMS mutagen agent. These plants were isolated transplanted in experimental area to advance the generation. Seeds produced by plants were sown in pots allocated in Biosystems Organized Development incubator and subjected to cold stress at 0°C in seedling stage. Surviving seedlings per family were transplanted to field conditions in Southern Brazil. The plant development was evaluated in the M2 generation during the agricultural years of 2012-2013 and 2013-2014. Genetic variability analyzes were carried out with 21 traits, based on the average Euclidean distance and the relative contribution proposed by Singh (1981). Chemical mutation induction with MMS generates genetic variability in palisade grass, enhancing the selection of superior genotypes in subtropical climate conditions. The chemical induction of mutations with the MMS mutagen provided genetic variability in the population of U. brizantha with formation of 18 divergent groups during the research.

Key words: Urochloa brizantha L., plant breeding, genetic recombination, forage, multivariate analyses.