Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
| Autor: | Adriano Pereira de Castro, Luis Fernando Stone, Jaison Pereira de Oliveira, Cleber Morais Guimarães |
|---|---|
| Přispěvatelé: | CLEBER MORAIS GUIMARAES, CNPAF, ADRIANO PEREIRA DE CASTRO, CNPAF, LUIS FERNANDO STONE, CNPAF, JAISON PEREIRA DE OLIVEIRA, CNPAF. |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Sterility Genótipo Agriculture (General) Drought tolerance Randomized block design Esterilidade de espiguetas Oryza sativa Fisiologia de Plantas Cultivadas Biology Upland rice 01 natural sciences Tangara S1-972 earliness Deficiência hídrica Massa dos grãos Oryza sativa L Cultivar Características agronômicas Panicle Precocidade vegetal grain weight Crop yield food and beverages 04 agricultural and veterinary sciences biology.organism_classification spikelet sterility Agronomy Arroz 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Acta Scientiarum: Agronomy, Vol 38, Iss 2 (2016) Acta Scientiarum. Agronomy; Vol 38 No 2 (2016); 201-206 Acta Scientiarum. Agronomy; v. 38 n. 2 (2016); 201-206 Acta Scientiarum. Agronomy Universidade Estadual de Maringá (UEM) instacron:UEM Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 1807-8621 1679-9275 |
| DOI: | 10.4025/actasciagron.v38i2.27164 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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