Data/hora: 02/06/2024 02:24:07

Provedor de dados: | 1
País: | Brazil
Título: | Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
Autores: | Guimarães, Cleber Morais; Castro, Adriano Pereira de; Stone, Luís Fernando; Oliveira, Jaison Pereira de.
Data: | 2016-04-01
Ano: | 2016
Palavras-chave: | 5.01.03.06-7 Oryza sativa L.; Spikelet sterility; Earliness; Grain weight Fisiologia de Plantas Cultivadas.
Resumo: | 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164

10.4025/actasciagron.v38i2.27164

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164/pdf_128
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 38, n. 2 (2016); 201-206

Acta Scientiarum. Agronomy; v. 38, n. 2 (2016); 201-206

1807-8621

1679-9275