Analyse monosomique de la résistance à Septoria nodorum Berk chez le blé tendre (Triticum aestivum L. em. Thell (Vill) M.K.)

Auriau, Philippe; Rapilly, F.; Cauderon, Y.; Richard, Hervé; Roussel, Joséphine; Depatureaux, Camille

doi:10.1051/agro:19880109

Cited by 4 publications

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“…Two QTLs for SNB glume resistance were identified in this study, both located on the long arm of chromosome 2D. Stagonospora nodorum blotch resistance has been previously identified on chromosome 2D in the wheat line L22 using monosomic analysis (Auriau et al, 1988) and more recently conferring SNB resistance on wheat leaves but not glume resistance in a Forno × Oberkulmer RI population (Aguilar et al, 2005). Given that QSnl.eth ‐ 2D is not effective in glumes (Aguilar et al, 2005), it is likely that different genes reside on 2DL and the resistance locus in Oberkulmer is different from that of P91193D1 and Coker 8427, since there was no similarity at the marker loci Xgwm526.1 and Xcfd50.2…”

Section: Discussionmentioning

confidence: 64%

Quantitative Trait Loci Identified for Resistance to Stagonospora Glume Blotch in Wheat in the USA and Australia

et al. 2007

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Resistance to stagonospora nodorum blotch (SNB) in glumes of hexaploid wheat (Triticum aestivum L.), caused by Phaeosphaeria (Stagonospora anamorph) nodorum was investigated in a recombinant‐inbred (RI) population. The Purdue University winter wheat breeding lines P91193D1 and P92201D5, unrelated by parentage but both exhibiting partial SNB resistance, were crossed to develop 254 RI lines by single‐seed descent (SSD) from a random population of F2 plants, to identify quantitative trait loci (QTLs) controlling SNB resistance in wheat glumes. The RI population, together with parent lines, was phenotyped for glume resistance to SNB under field conditions in F8:10 at Evansville, Vincennes, and Lafayette, IN, in 2003; in F7:9 at South Perth, Australia, in 2004; and in F8:10 in greenhouse‐grown inoculated tests at Lafayette in 2003 and 2004. Two QTLs for resistance to SNB in glumes were identified: QSng.pur‐2DL.1 from P91193D1 and QSng.pur‐2DL.2 from P92201D5. The QTL QSng.pur‐2DL.1 explained from 12.3% of the phenotypic variation for resistance in southern Indiana (Evansville and Vincennes) to 38.1% at South Perth; QSng.pur‐2DL.2 accounted for 6.9 and 11.2% of the phenotypic variation in Indiana and South Perth, respectively. This study is the first report of SNB glume blotch resistance in which the same QTLs were identified in tests on different continents where Stagonospora nodorum populations are probably genetically diverse.

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Section: Discussionmentioning

confidence: 64%

Quantitative Trait Loci Identified for Resistance to Stagonospora Glume Blotch in Wheat in the USA and Australia

et al. 2007

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Chromosome and chromosomal arm locations of genes for resistance to Septoria glume blotch in wheat cultivar Cotipora

Bostwick

Sharma

et al. 1996

Euphytica

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Detection of QTLs for Stagonospora glume blotch resistance in Swiss winter wheat

Schnurbusch

Paillard

Fossati³

et al. 2003

Theor Appl Genet

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Stagonospora nodorum is the causal agent of the Stagonospora glume blotch disease in hexaploid wheat. The Swiss winter bread wheat cv. 'Arina' has a highly effective, durable and quantitative glume blotch resistance. We studied 240 single seed descent (SSD)-derived lines of an 'Arina x Forno' F(5:7) population to identify and map quantitative trait loci (QTLs) for glume blotch resistance under natural infestation. Using composite interval mapping (CIM) and LOD>4.5, we detected two chromosomal regions on chromosome arms 3BS and 4BL which were specifically associated with glume blotch resistance. These identified QTLs were designated QSng.sfr-3BS and QSng.sfr-4BL, respectively. QSng.sfr-3BS peaked at the locus Xgwm389 in the telomeric region of the short arm of chromosome 3B and explained 31.2% of the observed phenotypic variance for the resistance within the population. The responsible QSng.sfr-3BS allele originated from the resistant parent 'Arina'. The QTL QSng.sfr-4BL (19.1%) mapped to chromosome arm 4BL ('Forno' allele) very close to two known genes, TaMlo and a catalase ( Cat). Both QTL alleles combined could enhance the resistance level by about 50%. Additionally, they showed significant epistatic effects (4.4%). We found PCR-based microsatellite markers closely linked to QSng.sfr-3BS (gwm389) and QSng.sfr-4BL (gwm251) which make marker-assisted selection (MAS) for Stagonospora glume blotch resistance feasible. We also found one resistance QTL, QSng.sfr-5BL, on the long arm of chromosome 5B which overlapped with QTLs for plant height as well as heading time.

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Analyse monosomique de la résistance à Septoria nodorum Berk chez le blé tendre (Triticum aestivum L. em. Thell (Vill) M.K.)

Cited by 4 publications

References 0 publications

Quantitative Trait Loci Identified for Resistance to Stagonospora Glume Blotch in Wheat in the USA and Australia

Quantitative Trait Loci Identified for Resistance to Stagonospora Glume Blotch in Wheat in the USA and Australia

Chromosome and chromosomal arm locations of genes for resistance to Septoria glume blotch in wheat cultivar Cotipora

Detection of QTLs for Stagonospora glume blotch resistance in Swiss winter wheat

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