| Revista: | Scientia Agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000455510 |
| ISSN: | 0103-9016 |
| Autores: | Soares, Guilherme Filgueiras1 Ribeiro-Júnior, Walter Quadros2 Pereira, Lucas Felisberto3 Lima, Cristiane Andréa de1 Soares, Daiane dos Santos1 Muller, Onno4 Rascher, Uwe4 Ramos, Maria Lucrecia Gerosa1 |
| Instituciones: | 1Universidade de Brasilia, Faculdade de Agronomia e Veterinaria, Brasilia, Distrito Federal. Brasil 2Empresa Brasileira de Pesquisa Agropecuaria, Cerrados, Planaltina, Distrito Federal. Brasil 3Instituto Federal Goiano, Faculdade de Agronomia, Posse, Goias. Brasil 4Forschungszentrum Geesthacht GmbH, Julich, Nordrhein-Westfalen. Alemania |
| Año: | 2021 |
| Volumen: | 78 |
| Número: | 5 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | The selection of wheat genotypes according to their drought tolerance is essential to off-season cultivation. The objective of this work was to characterize wheat genotypes through yield and components, morphological characteristics under water stress, and irrigated water use efficiency in the Cerrado region in Brazil. Genotypes were planted during the winters of 2016 and 2017 since there is no precipitation during this season and water levels can be measured. They were then submitted to four water regimes: WR1, WR2, WR3, and WR4, representing 100 %, 83 %, 50 %, and 30 % of evapotranspiration replacement. The following variables were evaluated: peduncle length (PL), number of ears m−2 (NE m−2), hectoliter weight (HW), thousand grain weight (TGW), drought resistance index (DRI), irrigated water use efficiency (IWUE) and yield. Most variables showed correlation with yield and can be a useful tool for breeding programs. PL and HW were best correlated with yield. BRS 264 (irrigated biotype) was productive in treatments receiving the greatest number of irrigation treatments. Given that WR1 registered the highest water level, it was not expected that the rainfed biotype (BR18) would show a higher yield than an irrigated biotype (BRS254). BRS404 (rainfed biotype) was the most productive under moderate stress treatment (WR3). Aliança (rainfed biotype) showed a higher yield under severe stress. Rainfed biotypes presented a higher DRI than the irrigated ones. These genotypes can be used as a reference in breeding programs under each water regime in which their performance was outstanding. None of the variables studied contributed to the selection of the most efficient wheat genotypes in the IWUE |
| Disciplinas: | Agrociencias, Biología |
| Palabras clave: | Fisiología vegetal, Gramíneas, Trigo, Triticum aestivum, Genotipos, Tolerancia, Estrés hídrico |
| Keyword: | Gramineae, Plant physiology, Wheat, Triticum aestivum, Genotypes, Tolerance, Water stress |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
