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Selection of drought-tolerant tef (Eragrostis tef) genotypes using drought tolerance indices
- Source :
- South African Journal of Plant and Soil. 34:291-300
- Publication Year :
- 2017
- Publisher :
- Informa UK Limited, 2017.
-
Abstract
- Drought stress is one of the major abiotic constraints affecting production and productivity of tef (Eragrostis tef). Genetic resources and selection methodologies are among the prerequisites to improve the efficiency of breeding for drought tolerance. The objectives of this study were to determine the principal selection indices and to identify promising genetic resources of tef for drought tolerance breeding. A total of 144 tef genotypes were evaluated using a simple lattice design with two replications. Genotypes showed highly significant (p ≤ 0.01) differences for 10 drought tolerance indices. Principal component and correlation analyses revealed mean productivity, harmonic mean, geometric mean productivity and stress tolerance index as the principal indices highly correlated with grain yield in the stressed and non-stressed environments, indicating their suitability for identifying superior tef genotypes. Genotypes 215678 (g25) and Dschanger (g133) were adaptable to both stressed and non-stressed env...
- Subjects :
- 0106 biological sciences
Abiotic component
Drought stress
Ecology
biology
Drought tolerance
Soil Science
04 agricultural and veterinary sciences
Plant Science
Eragrostis
biology.organism_classification
01 natural sciences
Agronomy
Genetic resources
embryonic structures
Genotype
Principal component analysis
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Grain yield
010606 plant biology & botany
Subjects
Details
- ISSN :
- 2167034X and 02571862
- Volume :
- 34
- Database :
- OpenAIRE
- Journal :
- South African Journal of Plant and Soil
- Accession number :
- edsair.doi...........4c663199010fa5b9c047ef0784bd249f