Selection efficiency for increasing physic nut oil content

Authors

  • Rodrigo Barros Rocha Embrapa Rondonia
  • André Rostand Ramalho Embrapa Rondônia. Rodovia Marechal Rondon (BR 364) - Km 5,5 - Laboratório de Análises de Sementes (LAS) Setor Rural 78900-970 - Porto Velho, RO - Brasil - Caixa-Postal: 406
  • Alexsandro Lara Teixeira Embrapa Rondônia. Rodovia BR 364 - Km 5,5 Cidade Jardim 76815-800 - Porto Velho, RO - Brasil
  • Bruno Galvêas Laviola Embrapa Agroenergia. Parque Estação Biológica - PqEB s/n Asa Norte 70770-901 - Brasilia, DF - Brasil
  • Francisco Célio Gomes da Silva Universidade Federal de Rondônia, Departamento de Química. BR 364 Km 9,5 sentido Rio Branco 76829-625 - Porto Velho, RO - Brasil
  • Júlio Sancho Linhares Teixeira Militão Universidade Federal de Rondônia Br 364, Km 12 - sentido Guajará Mirim Área Rural 78900000 - Porto Velho, RO - Brasil

DOI:

https://doi.org/10.1590/S1678-3921.pab2012.v47.11258

Keywords:

Jatropha curcas, biofuels, selection index, genetic breeding, kernel weight, commercial variety

Abstract

The objective of this work was to estimate the genetic parameters of physic nut (Jatropha curcas) grain quality traits and to quantify the genetic progress with selection. Seed oil content, and seed, kernel, and
shell weights of 120 plants, randomly selected in a commercial planting, were evaluated at 36 and 48 months. Genetic progress was quantified by the evaluation of direct gains and by the use of selection indexes. The genotype x measurement interaction was significant for all evaluated traits; therefore, there are genotypes with different behavior in the two cropping seasons. The genetic parameters indicated a higher proportion
of genotypic variation in the expression of the evaluated traits, and a trend of the genotypes to maintain their genetic superiority over time was observed. The genotype‑ideotype selection index resulted in higher genetic gains and promoted a more balanced alteration in the trait means. The direct selection for kernel weight results in genetic gains similar to those obtained with the use of the selection indexes.

Author Biographies

  • Rodrigo Barros Rocha, Embrapa Rondonia

    http://lattes.cnpq.br/8295625748916004

  • André Rostand Ramalho, Embrapa Rondônia. Rodovia Marechal Rondon (BR 364) - Km 5,5 - Laboratório de Análises de Sementes (LAS) Setor Rural 78900-970 - Porto Velho, RO - Brasil - Caixa-Postal: 406

    http://lattes.cnpq.br/6008824674984763

  • Alexsandro Lara Teixeira, Embrapa Rondônia. Rodovia BR 364 - Km 5,5 Cidade Jardim 76815-800 - Porto Velho, RO - Brasil
    http://lattes.cnpq.br/0157747115875716
  • Bruno Galvêas Laviola, Embrapa Agroenergia. Parque Estação Biológica - PqEB s/n Asa Norte 70770-901 - Brasilia, DF - Brasil
    http://lattes.cnpq.br/3008972872111623
  • Francisco Célio Gomes da Silva, Universidade Federal de Rondônia, Departamento de Química. BR 364 Km 9,5 sentido Rio Branco 76829-625 - Porto Velho, RO - Brasil

    http://lattes.cnpq.br/8165151206443398

  • Júlio Sancho Linhares Teixeira Militão, Universidade Federal de Rondônia Br 364, Km 12 - sentido Guajará Mirim Área Rural 78900000 - Porto Velho, RO - Brasil

    http://lattes.cnpq.br/1678856829160058

Downloads

Published

2012-03-19

Issue

v.47, n.1, jan. 2012

Section

GENETICS

How to Cite

Rocha, R. B., Ramalho, A. R., Teixeira, A. L., Laviola, B. G., Silva, F. C. G. da, & Militão, J. S. L. T. (2012). Selection efficiency for increasing physic nut oil content. Pesquisa Agropecuaria Brasileira, 47(1), 44-50. https://doi.org/10.1590/S1678-3921.pab2012.v47.11258

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