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dc.contributorVerma, Ramesh Pal Singhen_US
dc.contributorBelqadi, Loubnaen_US
dc.contributorChao, Shiaomanen_US
dc.contributorArbaoui, Mustaphaen_US
dc.contributorRehman, Sajiden_US
dc.contributorGyawali, Sanjayaen_US
dc.creatorReda, Amezrouen_US
dc.identifier.citationAmezrou Reda, Ramesh Pal Singh Verma, Loubna Belqadi, Shiaoman Chao, Mustapha Arbaoui, Sajid Rehman, Sanjaya Gyawali. (7/4/2017). Association Mapping of Powdery mildew resistance in barley. Rabat, Morocco.en_US
dc.description.abstractPowdery mildew caused by Blumeria graminis f sp. hordei is an important foliar disease of barley crop worldwide. The disease causes 25 to 30 % yield losses in susceptible cultivars and can reach up to 50 % if the climatic conditions are pertaining to spreading of the disease. Many strategies were improved to in the battle against the disease but the most economic and environmental friendly way to control powdery mildew remains the use of robust varieties with durable resistance. Thus, the objectives of this study were set to identify the genomic regions conditioning resistance to powdery mildew in 336 barley genotypes originating from ICARDA germplasm, as well as to identify markers tightly linked with these loci, to help in better integration of resistance in improved germplasm. An Association Mapping panel (AM panel) was genotyped using 9K iSELECT SNP markers and phenotyped in an alpha-lattice design with two replicates, during two cropping seasons (2015 and 2016) in four hot-spot locations known for their favorable environmental conditions of epidemics development. A mixed linear model (structure and kinship as covariate) was used to identify significant marker-trait associations (MTA) linked with powdery mildew resistance. A total of 39 MTAs were found associated with resistance/susceptibility across all seven chromosomes. Using a cutoff of 5cM, the results show 27 distinct genomic regions conditioning the resistance or susceptibility to the pathogen, including some of the already reported R-genes (Mla6, MlLa, Mlg, Ror2, Mlra). The novel loci identified in the current study may represent a broad spectrum of powdery mildew resistance and will be useful in marker-assisted barley improvement.en_US
dc.publisherInternational Center for Agricultural Research in the Dry Areas (ICARDA)en_US
dc.subjectpowdery mildew resistanceen_US
dc.titleAssociation Mapping of Powdery mildew resistance in barleyen_US
dc.typeConference Paperen_US
cg.creator.idVerma, Ramesh Pal Singh: 0000-0002-2621-2015en_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerInstitute of Agronomy and Veterinary Hassan II - IAV HASSAN IIen_US
cg.contributor.centerUnited State Department of Agriculture, Agricultural Research Service, Natural Resource Management Research - USDA-ARS Mandanen_US
cg.contributor.crpCRP on Dryland Cereals - DCen_US
cg.contributor.funderArab Fund for Economic and Social Development - AFESDen_US
cg.contributor.projectSustainability and Operation of the Regional Research Centers in a Number of Arab Countries (Phase II)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
dc.identifier.statusOpen accessen_US

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