<b>Drought tolerance in upland rice: identification of genotypes and agronomic characteristics

  • Cleber Morais Guimarães Empresa Brasileira de Pesquisa Agropecuária
  • Adriano Pereira de Castro Empresa Brasileira de Pesquisa Agropecuária
  • Luís Fernando Stone Empresa Brasileira de Pesquisa Agropecuária
  • Jaison Pereira de Oliveira Empresa Brasileira de Pesquisa Agropecuária
Keywords: Oryza sativa L., spikelet sterility, earliness, grain weight

Abstract

This study aimed to identify upland rice cultivars and elite lines that are tolerant to drought and the agronomic traits associated with this tolerance. Forty-one genotypes were evaluated in a randomized block design with three replications in experiments with and without water stress at the Experimental Station of Emater, in Porangatu, Goiás State, in 2011 and 2012. The first experiment was well-irrigated throughout plant development and the second experiment was irrigated only up to 40 days after emergence, after which water stress was imposed. A multivariate analysis using Ward’s method was applied, and the genotypes with and without water stress were classified into six and seven clusters, respectively, based on the average yield in the two years of experimentation. The most productive cluster under water stress comprised the genotypes AB062041, Douradão, Guarani, BRS Aimoré, and Tangará. The first four genotypes of this cluster were also ranked in the second most productive cluster under  well-irrigated conditions. In the selection for drought tolerance, the genotypes that exhibit precocity, less dense panicles, low sterility and greater 100-grain weight under water stress should be prioritized.

 

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Author Biography

Cleber Morais Guimarães, Empresa Brasileira de Pesquisa Agropecuária

1. DADOS PESSOAIS

          Nome: Cleber Morais Guimarães

          Nascimento: 21/09/1948, Piracema/MG - Brasil

          CPF: 16563646620

 2. FORMAÇÃO ACADÊMICA/TITULAÇÃO

           1989 - 1992       Doutorado em Biologia Vegetal.

 Universidade Estadual de Campinas, UNICAMP, São  Paulo, Brasil.

 Título: Características morfo-fisiológicas do feijoeiro (Phaseolus vulgaris L.) relacionadas com a resistência à seca. Ano de obtenção: 1992.

 Orientador: Dr Orivaldo Brunini.

 Bolsista do(a): Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA, Brasil.

          1977 - 1979       Mestrado em Crop Physiology.

  Mississippi State University, MSU, Estados Unidos.

            Título: Effects of soil moisture and atmospheric conditions on the water status of soybean plants (Glycine max (L.) Merril). Ano de obtenção: 1979.

                                    Orientador: Dr Harry Faraday Hodges.

                                    Bolsista do(a): Empresa Brasileira de Pesquisa Agropecuária, EMBRAPA, Brasil.

          1970 - 1973       Graduação em Agronomia.

                                    Universidade Federal de Viçosa, UFV, Minas Gerais, Brasil.

 3 ATUAÇÃO PROFISSIONAL

 Empresa Brasileira de Pesquisa Agropecuária - EMBRAPA

          1974 - Atual    

Vínculo: Servidor público ou celetista, Enquadramento funcional: Pesquisador III, Regime: Dedicação exclusiva.

Atividades

           3/1974 -

Pesquisa e desenvolvimento, Centro Nacional de Pesquisa de Arroz e Feijão.

Linhas de pesquisa

1. Solo-água-planta

Published
2016-04-01
How to Cite
Guimarães, C. M., Castro, A. P. de, Stone, L. F., & Oliveira, J. P. de. (2016). <b&gt;Drought tolerance in upland rice: identification of genotypes and agronomic characteristics. Acta Scientiarum. Agronomy, 38(2), 201-206. https://doi.org/10.4025/actasciagron.v38i2.27164
Section
Crop Production

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus