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dc.contributorCapettini, Flavioen_US
dc.contributorTrethowan, Ren_US
dc.contributorvan Ginkel, Maartenen_US
dc.contributorMejia, Apolinaren_US
dc.contributorCarballo, Aquilesen_US
dc.contributorCrossa, Joseen_US
dc.contributorVargas, M.en_US
dc.contributorBalbuena-Melgarejo, Artemioen_US
dc.creatorHernandez-Segundo, Eduardoen_US
dc.identifier.citationEduardo Hernandez-Segundo, Flavio Capettini, R Trethowan, Maarten van Ginkel, Apolinar Mejia, Aquiles Carballo, Jose Crossa, M. Vargas, Artemio Balbuena-Melgarejo. (1/1/2010). Mega-Environment Identification for Barley Based on Twenty-Seven Years of Global Grain Yield Data. Crop Science, 49 (5), pp. 1705-1718.en_US
dc.description.abstractKnowledge of target environments in breeding programs is important to better direct the development of germplasm. The objectives of this study were to identify associations among barley (Hordeum vulgare L.) growing environments to identify mega-environments to select the best locations to breed barley. Twenty-seven years of grain yield data from the International Barley Yield Trial (IBYT) conducted by the ICARDA-CIMMYT Barley Breeding Program, consisting of 750 grain yield trials of two replications representing 235 locations in 75 countries, were analyzed using pattern analysis to group sites across years that represent similar selection environments. The shifted multiplicative model (SHMM) was employed to group sites within each year. Environments clustered into three main groups and squared Euclidean distances were used to identify a representative location within each cluster. Group 1 locations were characterized as being cool with intermediate precipitation; Group 2 locations were warmer and drier; and Group 3 sites were generally cool and had the highest average precipitation. The respective representative key locations for each of the three groups were Leida, Spain; Boulifa, Tunisia; and Setif, Algeria. All three key locations are located in the Northern Hemisphere between 36 degrees and 41 degrees latitude. The results of this study show that the global adaptation of barley is possible and can be improved by breeding and selection for adaptation within the three main mega-environments identified.en_US
dc.publisherCrop Science Society of Americaen_US
dc.sourceCrop Science;49,(2009) Pagination 1705-1718en_US
dc.titleMega-Environment Identification for Barley Based on Twenty-Seven Years of Global Grain Yield Dataen_US
dc.typeJournal Articleen_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.centerUniversity of Sydney, Plant Breeding Instituteen_US
cg.contributor.centerColegio de Posgraduadosen_US
cg.contributor.centerUniversidad Autonoma del Estado de Mexicoen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.isijournalISI Journalen_US
dc.identifier.statusTimeless limited accessen_US
cg.journalCrop Scienceen_US

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