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

Optimum plot size for experiments with papaya genotypes in field

Edilson Romais Schmildt
  • Edilson Romais Schmildt
  • Laboratory of Plant Breeding, Federal University of Espírito Santo, São Mateus. Brazil.
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Adriel Lima Nascimento
  • Adriel Lima Nascimento
  • Postgraduate Program in Genetics and Breeding, Federal University of Espírito Santo, Alegre. Brazil.
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Alan de Lima Nascimento
  • Alan de Lima Nascimento
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus. Brazil.
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Karina Tiemi Hassuda dos Santos
  • Karina Tiemi Hassuda dos Santos
  • Laboratory of Plant Breeding, Federal University of Espírito Santo, São Mateus. Brazil.
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Renan Garcia Malikouski
  • Renan Garcia Malikouski
  • Laboratory of Plant Breeding, Federal University of Espírito Santo, São Mateus. Brazil.
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Omar Schmildt
  • Omar Schmildt
  • Laboratory of Plant Breeding, Federal University of Espírito Santo, São Mateus. Brazil.
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Clemilton Alves da Silva
  • Clemilton Alves da Silva
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus. Brazil.
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Geraldo Antonio Ferreguetti
  • Geraldo Antonio Ferreguetti
  • Caliman Agrícola S.A., Linhares. Brazil.
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Marcio Paulo Czepak
  • Marcio Paulo Czepak
  • Department of Agrarian and Biological Sciences, Federal University of Espírito Santo, São Mateus. Brazil.
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Julian Cuevas
  • Julian Cuevas
  • Department of Agronomy, University of Almería, ceiA3, Almería. Spain.
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  •  Received: 23 December 2017
  •  Accepted: 30 January 2018
  •  Published: 22 February 2018

Abstract

The objective of this study was to determine a suitable plot size for field experiments with papaya genotypes. Two experiments were carried out using a randomized complete block design with 11 and 12 papaya genotypes, respectively. In both experiments, plots consisted of one row, with 10 plants each. Spacing between rows was 3.5 m, with 1.5 m between plants. The characteristic evaluated was fruit production in t ha-1 in first year of cultivation, and the basic unit used was one plant. Suitable plot size was estimated using Lin and Binns, and Hatheway’s methods. These methods are complementary and should be used together in the determination of the optimum plot size. The results of these tests showed that the optimum plot size for the evaluation of yield in papaya was four plants by plot with four replications each assuming 30% of the precision for establishing differences among the means of two genotypes.

Key words: Breeding, Carica papaya, intrablock correlation.