Genetic cause and effect interrelationships for grain quality attributes of irrigated rice

Authors

  • Paulo Henrique Karling Facchinello Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.
  • Ivan Ricardo Carvalho Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Departamento de Estudos Agrários, Rua do Comércio, no 3.000, Bairro Universitário, CEP 98700-000 Ijuí, RS.
  • Eduardo Anibele Streck Instituto Federal Farroupilha, Campus São Vicente do Sul, Rua Vinte de Setembro, no 2.616, CEP 97420-000 São Vicente do Sul, RS.
  • Gabriel Almeida Aguiar Instituto Federal Rio Grande do Sul, Campus Sertão, Rodovia RS-135, Km 32,5, Distrito Engenheiro Luiz Englert, CEP 99170-000 Sertão, RS.
  • Janaína Goveia Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.
  • Michele Feijó Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.
  • Roberto Ramos Pereira Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.
  • Paulo Ricardo Reis Fagundes Embrapa Clima Temperado, BR 392, Km 78, 9o Distrito, Monte Bonito, Caixa Postal 403, CEP 96010-971 Pelotas, RS.
  • Murilo Vieira Loro Universidade Federal de Santa Maria, Centro de Ciência Rurais, Departamento de Fitotecnia, Avenida Roraima, no 1.000, Cidade Universitária, Camobi, Prédio 77, CEP 97105-900 Santa Maria, RS.
  • Luciano Carlos da Maia Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Campus Universitário, Avenida Eliseu Maciel, s/no, CEP 96160-000 Capão do Leão, RS.
  • Ariano Martins de Magalhães Júnior Embrapa Clima Temperado, BR 392, Km 78, 9o Distrito, Monte Bonito, Caixa Postal 403, CEP 96010-971 Pelotas, RS.

Keywords:

Oryza sativa, indirect selection, whole grains

Abstract

The objective of this work was to determine the genetic correlations and the direct and indirect associations of agronomic traits and grain quality attributes with the percentage of whole grains in flood irrigated rice. The experiment was carried out in two environments, in a randomized complete block design with three replicates, using 23 irrigated rice genotypes. The evaluated traits were: percentage of whole grains, caryopsis length, caryopsis width, panicle length, panicle weight, 1,000 grain weight, days to flowering, percentage of chalky grains with white belly, total chalky area, total whiteness, vitreous whiteness, and defects in coloring. The percentage of grains with white belly and total chalky area were positively correlated, whereas the percentage of grains with white belly and vitreous whiteness were negatively correlated. The traits caryopsis width, percentage of chalky grains with white belly, panicle weight, and 1,000 grain weight showed indirect effects on whole-grain yield response according to total chalky area and total whiteness. Total chalky area and total whiteness are the factors that most negatively influence the percentage of whole grains according to the genotypic correlations and direct effects.

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Published

2024-03-22

How to Cite

Facchinello, P. H. K., Carvalho, I. R., Streck, E. A., Aguiar, G. A., Goveia, J., Feijó, M., … Magalhães Júnior, A. M. de. (2024). Genetic cause and effect interrelationships for grain quality attributes of irrigated rice. Pesquisa Agropecuaria Brasileira, 58(AA), e03252. Retrieved from https://apct.sede.embrapa.br/pab/article/view/27473

Issue

V.58, Jan./Dec., 2023 :Continuos publication

Section

GENETICS