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dc.contributorNsarellah, Nasserlehaqen_US
dc.contributorJlibene, Mohammeden_US
dc.contributorTadesse, Wuletawen_US
dc.contributorBirouk, Ahmeden_US
dc.contributorOuabbou, Hassanen_US
dc.creatorBennani, Saharen_US
dc.identifier.citationSahar Bennani, Nasserlehaq Nsarellah, Mohammed Jlibene, Wuletaw Tadesse, Ahmed Birouk, Hassan Ouabbou. (Accepted on 15/2/2017). Efficiency of drought tolerance indices under different stress severities for bread wheat selection.en_US
dc.description.abstractDrought is a world-wide spread problem adversely affecting bread wheat production in rainfed agro-ecosystems. Development and identification of efficient selection criteria for developing drought tolerant wheat varieties with stable and high yield potential is of paramount importance. This study was carried out to evaluate 24 indices for selecting the best high yielding and drought tolerant cultivars, among 40 bread wheat genotypes, under four levels of stress intensities: no stress, mild (0.25, 0.35) and severe (0.57). The mean productivity (MP), modified stress tolerance index (MSTIk), superiority index (Pi), mean relative performance (MRP), relative efficiency index (REI), geometric mean productivity (GMP), stress tolerance index (STI), harmonic mean (HARM) and relative decrease in yield (RDY) showed a high power of discrimination among genotypes, and expressed significant correlations with yields under both stress and non-stressed conditions at all stress intensities. This group of indices was capable to select the highest mean yield associated with the least mean variance at 20 % selection pressure. However, as the stress intensity became greater (>35 %), the efficiency of these indices decreased, especially at high stress intensity (57%), where only Pi and MP were still able to target the highest performances. MRP, REI, GMP, RDY and STI can be used interchangeably. Based on GGE analysis, the best performing genotypes were AUS30355, followed by Gladius, Amir-2 and AUS30354 that showed high yield and stability across all the environments. These genotypes are recommended for direct release and/or for use as parents in the breeding programs.en_US
dc.subjectgrain yielden_US
dc.subjectstress intensityen_US
dc.subjecttolerance indicesen_US
dc.titleEfficiency of drought tolerance indices under different stress severities for bread wheat selectionen_US
dc.typeJournal Articleen_US
cg.creator.idTadesse, Wuletaw: 0000-0003-1175-3502en_US
cg.subject.agrovocdrought stressen_US
cg.subject.agrovoctriticum aestivumen_US
cg.contributor.centerNational Institute of Agronomic Research Morocco - INRA Moroccoen_US
cg.contributor.centerMohammed VI Polytechnic University - UM6Pen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerNational Institute of Agronomic Research, Regional center in Kenitra - INRA - CRRAen_US
cg.contributor.crpCRP 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
dc.identifier.statusLimited accessen_US

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