Qualitative and quantitative trait loci conditioning resistance to Puccinia coronata pathotypes NQMG and LGCG in the oat (Avena sativa L.) cultivars Ogle and TAM O-301

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
E W JacksonJ M Bonman

Abstract

Mapping disease resistance loci relies on the type and precision of phenotypic measurements. For crown rust of oat, disease severity is commonly assessed based on visual ratings of infection types (IT) and/or diseased leaf area (DLA) of infected plants in the greenhouse or field. These data can be affected by several variables including; (i) non-uniform disease development in the field; (ii) atypical symptom development in the greenhouse; (iii) the presence of multiple pathogenic races or pathotypes in the field, and (iv) rating bias. To overcome these limitations, we mapped crown rust resistance to single isolates in the Ogle/TAM O-301 (OT) recombinant inbred line (RIL) population using detailed measurements of IT, uredinia length (UL) and relative fungal DNA (FDNA) estimates determined by q-PCR. Measurements were taken on OT parents and recombinant inbred lines (RIL) inoculated with Puccinia coronata pathotypes NQMG and LGCG in separate greenhouse and field tests. Qualitative mapping identified an allele conferred by TAM O-301 on linkage group (LG) OT-11, which produced a bleached fleck phenotype to both NQMG and LGCG. Quantitative mapping identified two major quantitative trait loci (QTL) originating from TAM O-301 on LGs OT...Continue Reading

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Citations

Sep 6, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·M J SanzE Ferrer
Jul 25, 2008·Genome Génome / Conseil National De Recherches Canada·Pirjo TanhuanpääElina Kiviharju
Sep 22, 2009·Genome Génome / Conseil National De Recherches Canada·Yolanda LoarceEsther Ferrer
Jun 18, 2010·Genome Génome / Conseil National De Recherches Canada·R E OliverE W Jackson
Jun 18, 2010·Genome Génome / Conseil National De Recherches Canada·Pirjo TanhuanpääElina Kiviharju
Jul 21, 2017·The Plant Genome·Kathy Esvelt KlosNicholas A Tinker

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