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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 https://hdl.handle.net/20.500.12866/5656
dc.description.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. en_US
dc.language.iso eng
dc.publisher Springer
dc.relation.ispartof urn:issn:1432-2242
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Phenotype en_US
dc.subject Genotype en_US
dc.subject Quantitative Trait Loci en_US
dc.subject Genes en_US
dc.subject genotype en_US
dc.subject phenotype en_US
dc.subject genetics en_US
dc.subject quantitative trait locus en_US
dc.subject microbiology en_US
dc.subject statistical model en_US
dc.subject Models, Statistical en_US
dc.subject Genetic Association Studies en_US
dc.subject genetic association en_US
dc.subject Ascomycetes en_US
dc.subject Ascomycota en_US
dc.subject breeding en_US
dc.subject Plants (botany) en_US
dc.subject audiovisual equipment en_US
dc.subject Application programs en_US
dc.subject Barley (hordeum vulgare l.) en_US
dc.subject Basidiomycetes en_US
dc.subject Basidiomycota en_US
dc.subject Breeding en_US
dc.subject Chromosomes, Plant en_US
dc.subject Cochliobolus sativus en_US
dc.subject Design of experiments en_US
dc.subject disease resistance en_US
dc.subject Disease Resistance en_US
dc.subject Fungicide application en_US
dc.subject Genome-wide association en_US
dc.subject Geographical origins en_US
dc.subject Hordeum en_US
dc.subject Mapping en_US
dc.subject Models, Anatomic en_US
dc.subject plant chromosome en_US
dc.subject plant disease en_US
dc.subject Plant Diseases en_US
dc.subject Population structures en_US
dc.subject Puccinia striiformis en_US
dc.subject Quantitative trait locus en_US
dc.title Multi-environment multi-QTL association mapping identifies disease resistance QTL in barley germplasm from Latin America en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1007/s00122-014-2448-y
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.00 es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.06.07
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#4.01.06


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