Genetic resources for enhancing drought tolerance from a mini-core collection of spring bread wheat (Triticum aestivum L.)



Título del documento: Genetic resources for enhancing drought tolerance from a mini-core collection of spring bread wheat (Triticum aestivum L.)
Revista: Acta scientiarum. Agronomy
Base de datos: PERIÓDICA
Número de sistema: 000459572
ISSN: 1679-9275
Autores: 1
2
Instituciones: 1Agricultural Research Education and Extension Organization, Dryland Agricultural Research Institute, Kermanshah. Irán
2Agricultural Research Education and Extension Organization, Dryland Agricultural Research Institute, Maragheh. Irán
Año:
Volumen: 44
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Experimental, analítico
Resumen en inglés An enhanced level of drought tolerance in wheat (Triticum spp.) may be reached through combining agronomic and physiological traits associated with grain yield under drought conditions. We aimed to explore valuable diversity for the drought tolerance, existed in the core collection of Iranian spring bread wheat landraces. A number of 206 spring bread wheat accessions along with the check cultivar were assessed for grain yield, drought-adaptive traits, and estimated drought tolerance criteria during 2016-17 and 2017-18 growing seasons. Analysis of data using the best linear unbiased predictions (BLUPs) approach revealed that the genotype x environment (GE) interactions accounted for the highest variation in grain yield (36.23%) followed by 1000-kernel weight (35.39%), heading date (21.4%), days to maturity (16.38%), and plant height (5.83%). Using the hierarchical cluster analysis and developed pattern heat map based on the values for the agronomic traits and drought resistance indices, the accessions clustered into nine groups of different sets of agronomic and drought tolerance characteristics. Several accessions with high yield potential, early heading, optimal plant stature and high drought tolerance groups were identified. Three drought selection criteria of stress tolerance index (STI), geometric mean productivity (GMP) and mean productivity (MP) were more effective in identifying accessions producing higher yield under both drought and irrigated conditions. The superior accessions identified in this study may be explored further for breeding new wheat cultivars with enhanced level of drought tolerance
Disciplinas: Agrociencias,
Biología
Palabras clave: Gramíneas,
Genética,
Fitotecnia,
Trigo,
Triticum aestivum,
Tolerancia a la sequía
Keyword: Gramineae,
Genetics,
Crop husbandry,
Wheat,
Triticum aestivum,
Drought tolerance
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