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Multi-environment multi-QTL association mapping identifies disease resistance QTL in barley germplasm from Latin America

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dc.contributor.author Gutiérrez, L.
dc.contributor.author Germán, S.
dc.contributor.author Pereyra, S.
dc.contributor.author Hayes, P.M.
dc.contributor.author Pérez, C.A.
dc.contributor.author Capettini, F.
dc.contributor.author Locatelli, A.
dc.contributor.author Berberian, N.M.
dc.contributor.author Falconi, E.E.
dc.contributor.author Estrada, R.
dc.contributor.author Fros, D.
dc.contributor.author Gonza, V.
dc.contributor.author Altamirano, H.
dc.contributor.author Huerta-Espino, J.
dc.contributor.author Neyra, E.
dc.contributor.author Orjeda, G.
dc.contributor.author Sandoval-Islas, S.
dc.contributor.author Singh, R.
dc.contributor.author Turkington, K.
dc.contributor.author Castro, A.J.
dc.date.accessioned 2019-02-22T14:54:30Z
dc.date.available 2019-02-22T14:54:30Z
dc.date.issued 2014
dc.identifier.uri http://doi.org/10.1007/s00122-014-2448-y
dc.identifier.uri http://repositorio.upch.edu.pe/handle/upch/5656
dc.description.abstract Abstract: Diseases represent a major constraint for barley (Hordeum vulgare L.) production in Latin America. Spot blotch (caused by Cochliobolus sativus), stripe rust (caused by Puccinia striiformis f.sp. hordei) and leaf rust (caused by Puccinia hordei) are three of the most important diseases that affect the crop in the region. Since fungicide application is not an economically or environmentally sound solution, the development of durably resistant varieties is a priority for breeding programs. Therefore, new resistance sources are needed. The objective of this work was to detect genomic regions associated with field level plant resistance to spot blotch, stripe rust, and leaf rust in Latin American germplasm. Disease severities measured in multi-environment trials across the Americas and 1,096 SNPs in a population of 360 genotypes were used to identify genomic regions associated with disease resistance. Optimized experimental design and spatial modeling were used in each trial to estimate genotypic means. Genome-Wide Association Mapping (GWAS) in each environment was used to detect Quantitative Trait Loci (QTL). All significant environment-specific QTL were subsequently included in a multi-environment-multi-QTL (MEMQ) model. Geographical origin and inflorescence type were the main determinants of population structure. Spot blotch severity was low to intermediate while leaf and stripe rust severity was high in all environments. Mega-environments were defined by locations for spot blotch and leaf rust. Significant marker-trait associations for spot blotch (9 QTL), leaf (6 QTL) and stripe rust (7 QTL) and both global and environment-specific QTL were detected that will be useful for future breeding efforts. Key message: Multi-environment multi-QTL mixed models were used in a GWAS context to identify QTL for disease resistance. The use of mega-environments aided the interpretation of environment-specific and general QTL.
dc.language.iso eng
dc.publisher Springer Verlag
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Phenotype
dc.subject Genotype
dc.subject Quantitative Trait Loci
dc.subject Genes
dc.subject genotype
dc.subject phenotype
dc.subject genetics
dc.subject quantitative trait locus
dc.subject microbiology
dc.subject statistical model
dc.subject Models, Statistical
dc.subject Genetic Association Studies
dc.subject genetic association
dc.subject Ascomycetes
dc.subject Ascomycota
dc.subject breeding
dc.subject Plants (botany)
dc.subject audiovisual equipment
dc.subject Application programs
dc.subject Barley (hordeum vulgare l.)
dc.subject Basidiomycetes
dc.subject Basidiomycota
dc.subject Breeding
dc.subject Chromosomes, Plant
dc.subject Cochliobolus sativus
dc.subject Design of experiments
dc.subject disease resistance
dc.subject Disease Resistance
dc.subject Fungicide application
dc.subject Genome-wide association
dc.subject Geographical origins
dc.subject Hordeum
dc.subject Mapping
dc.subject Models, Anatomic
dc.subject plant chromosome
dc.subject plant disease
dc.subject Plant Diseases
dc.subject Population structures
dc.subject Puccinia striiformis
dc.subject Quantitative trait locus
dc.title Multi-environment multi-QTL association mapping identifies disease resistance QTL in barley germplasm from Latin America
dc.type info:eu-repo/semantics/article
dc.identifier.journal TAG Theoretical and Applied Genetics


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