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Improving adaptation to drought stress in white pea bean (Phaseolus vulgarisL.): Genotypic effects on grain yield, yield components and pod harvest index
- Source :
- Plant Breeding. 136:548-561
- Publication Year :
- 2017
- Publisher :
- Wiley, 2017.
-
Abstract
- Common bean (Phaseolus vulgaris L.) is the most important food legume crop in Africa and Latin America where rainfall pattern is unpredictable. The objectives were to identify better yielding common bean lines with good canning quality under drought, and to identify traits that could be used as selection criteria for evaluating drought-tolerant genotypes. In all, 35 advanced lines were developed through single seed descent and evaluated with a standard check under drought and irrigated conditions at two locations over 2 years in Ethiopia. Grain yield (GY), pod number per m2, seed number per m2 and seed weight decreased by 56%, 47%, 49% and 14%, respectively, under drought stress. Eight genotypes had better yield with good canning quality under drought compared to the check. Moderate to high proportion of genetic effects were observed under drought conditions for GY and yield components compared to genotype × environment effects. Significant positive correlations between GY and pod harvest index (PHI) in drought suggest that PHI could be used as an indirect selection criterion for common bean improvement.
- Subjects :
- 0106 biological sciences
Yield (engineering)
biology
fungi
Drought tolerance
food and beverages
04 agricultural and veterinary sciences
Plant Science
biology.organism_classification
01 natural sciences
Crop
Point of delivery
Agronomy
parasitic diseases
Genotype
040103 agronomy & agriculture
Genetics
0401 agriculture, forestry, and fisheries
Phaseolus
Adaptation
Agronomy and Crop Science
Legume
010606 plant biology & botany
Subjects
Details
- ISSN :
- 01799541
- Volume :
- 136
- Database :
- OpenAIRE
- Journal :
- Plant Breeding
- Accession number :
- edsair.doi...........d846bf0b434d5bf516128b5cb94712d0