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dc.contributorFirew, Mekbiben_US
dc.contributorTadesse, Wuletawen_US
dc.contributorTesfaye, Kindieen_US
dc.creatorAmare, Assefaen_US
dc.identifier.citationAssefa Amare, Mekbib Firew, Wuletaw Tadesse, Kindie Tesfaye. (31/12/2019). Screening of Drought Tolerant Bread Wheat (Triticum aestivum L. ) Genotypes using Yield Based Drought Tolerance Indices. Ethiopian Journal of Agricultural Sciences, 29 (2), pp. 1-16.en_US
dc.description.abstractDrought is one of the major abiotic constraints seriously influencing bread wheat (Triticum aestivum L.) genotype production in Ethiopia. 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 for drought and to identify drought tolerant genotypes under drought conditions. 256 bread wheat genotypes were evaluated using a simple lattice design with two replications. Number of irrigation and the amount of water supply was similar for both water regimes until 50% heading stages. Non-stressed plots were irrigated 2 times after 50% heading stage, while stressed plots received no water in order to simulate terminal drought. Genotypes showed highly significant differences (P ≤ 0.01) for grain yield under non-stressed and stressed conditions. Principal component and correlation analyses revealed mean productivity, geometric mean productivity, grain yield index 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 genotypes. Genotypes 147 and 100 were identified as more tolerant, which could be useful for drought stress tolerance breeding. Cluster analysis classified the genotypes into nine clusters. Cluster IX consisted of four genotypes, 18,137,100 and 147 gave high grain yield under both the moisture -stressed and non-stressed conditions with high value of mean productivity, geometric mean productivity, grain yield index and stress tolerance index. Therefore, breeders can select suitable genotypes under water-stressed conditions and compare their performance under nonstressed conditions using MP, GMP, YI and STI indices as a means to combine information on performance under both conditions.en_US
dc.publisherEthiopian Journal of Agricultural Sciencesen_US
dc.sourceEthiopian Journal of Agricultural Sciences;29,Pagination 1-16en_US
dc.subjectdrought toleranten_US
dc.subjectwheat (triticum aestivum l.)en_US
dc.titleScreening of Drought Tolerant Bread Wheat (Triticum aestivum L.) Genotypes using Yield Based Drought Tolerance Indicesen_US
dc.typeJournal Articleen_US
cg.creator.idTadesse, Wuletaw: 0000-0003-1175-3502en_US
cg.creator.idTesfaye, Kindie: 0000-0002-7201-8053en_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerInternational Maize and Wheat Improvement Center - CIMMYTen_US
cg.contributor.centerEthiopian Institute of Agricultural Research - EIARen_US
cg.contributor.centerHaramaya University - Haramayaen_US
cg.contributor.crpCGIAR Research Program on Wheat - WHEATen_US
cg.contributor.funderInternational Maize and Wheat Improvement Center - CIMMYTen_US
cg.contributor.projectCRP WHEAT Phase IIen_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionEastern Africaen_US
dc.identifier.statusOpen accessen_US
cg.journalEthiopian Journal of Agricultural Sciencesen_US

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