Pre-emptive breeding against karnal bunt infection in common wheat: combining genomic and agronomic information to identify suitable parents

dc.creatorEmebiri, L.C.
dc.creatorHildebrand, S.
dc.creatorTan, M.K.
dc.creatorJuliana, P.
dc.creatorSingh, P.K.
dc.creatorFuentes Dávila, G.
dc.creatorSingh, R.P.
dc.date2021-08-05T00:20:16Z
dc.date2021-08-05T00:20:16Z
dc.date2021
dc.date.accessioned2023-07-17T20:07:59Z
dc.date.available2023-07-17T20:07:59Z
dc.identifierhttps://hdl.handle.net/10883/21599
dc.identifier10.3389/fpls.2021.675859
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513378
dc.descriptionWheat (Triticum aestivum L.) is the most widely grown cereal crop in the world and is staple food to half the world’s population. The current world population is expected to reach 9.8 billion people by 2050, but food production is not expected to keep pace with demand in developing countries. Significant opportunities exist for traditional grain exporters to produce and export greater amounts of wheat to fill the gap. Karnal bunt, however, is a major threat, due to its use as a non-tariff trade barrier by several wheat-importing countries. The cultivation of resistant varieties remains the most cost-effective approach to manage the disease, but in countries that are free of the disease, genetic improvement is difficult due to quarantine restrictions. Here we report a study on pre-emptive breeding designed to identify linked molecular markers, evaluate the prospects of genomic selection as a tool, and prioritise wheat genotypes suitable for use as parents. In a genome-wide association (GWAS) study, we identified six DArTseq markers significantly linked to Karnal bunt resistance, which explained between 7.6 and 29.5% of the observed phenotypic variation. The accuracy of genomic prediction was estimated to vary between 0.53 and 0.56, depending on whether it is based solely on the identified Quantitative trait loci (QTL) markers or the use of genome-wide markers. As genotypes used as parents would be required to possess good yield and phenology, further research was conducted to assess the agronomic value of Karnal bunt resistant germplasm from the International Maize and Wheat Improvement Center (CIMMYT). We identified an ideal genotype, ZVS13_385, which possessed similar agronomic attributes to the highly successful Australian wheat variety, Mace. It is phenotypically resistant to Karnal bunt infection (<1% infection) and carried all the favourable alleles detected for resistance in this study. The identification of a genotype combining Karnal bunt resistance with adaptive agronomic traits overcomes the concerns of breeders regarding yield penalty in the absence of the disease.
dc.languageEnglish
dc.publisherFrontiers
dc.relationhttps://figshare.com/collections/Pre-emptive_Breeding_Against_Karnal_Bunt_Infection_in_Common_Wheat_Combining_Genomic_and_Agronomic_Information_to_Identify_Suitable_Parents/5533635
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source12
dc.source1664-462X
dc.sourceFrontiers in Plant Science
dc.source675859
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectKarnal Bunt Resistance
dc.subjectGenome-Wide Association Study
dc.subjectGWAS
dc.subjectGenomic Prediction
dc.subjectGrain Yield
dc.subjectKARNAL BUNT
dc.subjectDISEASE RESISTANCE
dc.subjectTILLETIA INDICA
dc.subjectWHEAT
dc.subjectTRITICUM AESTIVUM
dc.subjectGENOMICS
dc.subjectGRAIN
dc.titlePre-emptive breeding against karnal bunt infection in common wheat: combining genomic and agronomic information to identify suitable parents
dc.typeArticle
dc.typePublished Version
dc.coverageSwitzerland


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