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Grain yield stability of high-yielding barley genotypes under Egyptian conditions for enhancing resilience to climate change

AutorMansour, Elsayed ; Moustafa, Ehab S. A.; El-Naggar, Nehal Z. A.; Abdelsalam, Asmaa; Igartua Arregui, Ernesto
Palabras claveadaptation
biplot analysis
multi-environment trials
stability
Fecha de publicaciónjun-2018
EditorCSIRO Publishing
CitaciónMansour E, Moustafa ESA, El-Nagger NZA, Abdelsalam A, Igartua E. Grain yield stability of high-yielding barley genotypes under Egyptian conditions for enhancing resilience to climate change. Crop and Pasture Science 69 (7):681-690 (2018)
ResumenIdentifying stable, high-yielding genotypes is essential for food security. This is particularly relevant in the current climate change scenario, which results in increasing occurrence of adverse conditions in the Mediterranean region. The objective of this study was to evaluate stability of barley (Hordeum vulgare L.) grain yield, and its relationship to the duration of the growth cycle and its stability under Mediterranean conditions in Egypt. Nineteen genotypes were evaluated during three growing seasons (2013–14 to 2015–16) at two locations (Elkhatara, Ghazala) and two growing seasons (2014–15 and 2015–16) at a third location (Ras-Sudr), i.e. eight environments (location–year combinations) in total. The linear regression explained a significant 48.2% and 22.8% of GEI variation for days to heading and grain yield, respectively, and the genotypic linear slopes were highly related to the first principal component of the AMMI model. Although all genotypes were well adapted to the region, there were different GEI responses, with changes in ranking across locations. Some stable and broadly adapted genotypes were identified, as well as unstable genotypes with specific adaptations. High yields across environments were attained by very stable (G4, G5), intermediate and stable (G1, G9) and highly responsive (G18, G19) genotypes. In general, responsiveness (b values) of yield and days to heading were negatively correlated, and high yielding genotypes showed different patterns of responses of days to heading. Genotypes G1, G4, G5 and G9 seemed best adapted overall, with longer season genotypes (e.g. G18 and G19) offering prospects to explore other formats of varieties in breeding, particularly for situations of climate instability.
Descripción17 Pags.- 5 Tabls. The definitive version is available at: http://www.publish.csiro.au/cp
Versión del editorhttps://doi.org/10.1071/CP18144
URIhttp://hdl.handle.net/10261/169587
DOI10.1071/CP18144
ISSN1836-0947
E-ISSN1836-5795
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