Genetic mapping for agronomic traits in a MAGIC population of common bean (Phaseolus vulgaris L.) under drought conditions

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cg.authorship.typesCGIAR single centreen
cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.contributor.crpGrain Legumes and Dryland Cereals
cg.contributor.donorBill & Melinda Gates Foundationen
cg.creator.identifierJuan David Lobaton: 0000-0001-8369-3831en
cg.creator.identifierJorge Duitama: 0000-0002-9105-6266en
cg.creator.identifierDaniel Ariza-Suarez: 0000-0002-1871-3514en
cg.creator.identifierPaulo Izquierdo: 0000-0002-2153-0655en
cg.creator.identifierStephen E Beebe: 0000-0002-3742-9930en
cg.creator.identifierbodo raatz: 0000-0003-0556-0691en
cg.identifier.doihttps://doi.org/10.1186/s12864-020-07213-6en
cg.isijournalISI Journalen
cg.issn1471-2164en
cg.issue1en
cg.journalBMC Genomicsen
cg.reviewStatusPeer Reviewen
cg.subject.alliancebiovciatBEANSen
cg.volume21en
dc.contributor.authorDíaz, Santiagoen
dc.contributor.authorAriza-Suárez, Danielen
dc.contributor.authorIzquierdo, Pauloen
dc.contributor.authorLobaton, Juan Daviden
dc.contributor.authorHoz, Juan Fernando de laen
dc.contributor.authorAcevedo, Fernandoen
dc.contributor.authorDuitama, Jorgeen
dc.contributor.authorGuerrero, Alberto F.en
dc.contributor.authorCajiao V., César Hernandoen
dc.contributor.authorMayor, Victoren
dc.contributor.authorBeebe, Stephen E.en
dc.contributor.authorRaatz, Bodoen
dc.date.accessioned2020-11-25T14:13:59Zen
dc.date.available2020-11-25T14:13:59Zen
dc.identifier.urihttps://hdl.handle.net/10568/110291
dc.titleGenetic mapping for agronomic traits in a MAGIC population of common bean (Phaseolus vulgaris L.) under drought conditionsen
dcterms.abstractBackground Common bean is an important staple crop in the tropics of Africa, Asia and the Americas. Particularly smallholder farmers rely on bean as a source for calories, protein and micronutrients. Drought is a major production constraint for common bean, a situation that will be aggravated with current climate change scenarios. In this context, new tools designed to understand the genetic basis governing the phenotypic responses to abiotic stress are required to improve transfer of desirable traits into cultivated beans. Results A multiparent advanced generation intercross (MAGIC) population of common bean was generated from eight Mesoamerican breeding lines representing the phenotypic and genotypic diversity of the CIAT Mesoamerican breeding program. This population was assessed under drought conditions in two field trials for yield, 100 seed weight, iron and zinc accumulation, phenology and pod harvest index. Transgressive segregation was observed for most of these traits. Yield was positively correlated with yield components and pod harvest index (PHI), and negative correlations were found with phenology traits and micromineral contents. Founder haplotypes in the population were identified using Genotyping by Sequencing (GBS). No major population structure was observed in the population. Whole Genome Sequencing (WGS) data from the founder lines was used to impute genotyping data for GWAS. Genetic mapping was carried out with two methods, using association mapping with GWAS, and linkage mapping with haplotype-based interval screening. Thirteen high confidence QTL were identified using both methods and several QTL hotspots were found controlling multiple traits. A major QTL hotspot located on chromosome Pv01 for phenology traits and yield was identified. Further hotspots affecting several traits were observed on chromosomes Pv03 and Pv08. A major QTL for seed Fe content was contributed by MIB778, the founder line with highest micromineral accumulation. Based on imputed WGS data, candidate genes are reported for the identified major QTL, and sequence changes were identified that could cause the phenotypic variation. Conclusions This work demonstrates the importance of this common bean MAGIC population for genetic mapping of agronomic traits, to identify trait associations for molecular breeding tool design and as a new genetic resource for the bean research community.en
dcterms.accessRightsOpen Access
dcterms.audienceScientistsen
dcterms.available2020-11-16en
dcterms.bibliographicCitationDiaz, S.; Ariza-Suarez, D.; Izquierdo, P.; Lobaton, J.D.; de la Hoz, J.F.; Acevedo, F.; Duitama, J.; Guerrero, A.F.; Cajiao, C.; Mayor, V.; Beebe, S.E.; Raatz, B. (2020) Genetic mapping for agronomic traits in a MAGIC population of common bean (Phaseolus vulgaris L.) under drought conditions. BMC Genomics 21: 799 20 p. ISSN: 1471-2164en
dcterms.extent20 p.en
dcterms.issued2020-12en
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherSpringeren
dcterms.subjectgenotypesen
dcterms.subjectgenomesen
dcterms.subjectdroughten
dcterms.subjectagronomic charactersen
dcterms.subjectquantitative trait locien
dcterms.subjectsequence experimentsen
dcterms.subjectgenotiposen
dcterms.subjectgenomasen
dcterms.subjectsequíaen
dcterms.typeJournal Article

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