Genetic control and chromosomal location of <i>Triticum timopheevii</i>-derived resistance to septoria nodorum blotch in durum wheat

Ma, Hong; Hughes, G. R.

doi:10.1139/g95-042

Cited by 44 publications

(48 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although single genes have been identified in some Triticum accessions (11,20,23,26), resistance in seedlings and adult plants is largely under polygenic control (4,38). Several independent genes control glume and flag leaf resistance (4,14) and their effects are mainly additive in adult plants and seedlings (8,31).…”

Section: Additional Abstract: Phaeosphaeria Nodorum Pleiotropymentioning

confidence: 99%

Quantitative Trait Loci for Seedling and Adult Plant Resistance to Stagonospora nodorum in Wheat

Shankar¹,

Walker²,

Golzar³

et al. 2008

Phytopathology®

View full text Add to dashboard Cite

Shankar, M., Walker, E., Golzar, H., Loughman, R., Wilson, R. E., and Francki, M. G. 2008. Quantitative trait loci for seedling and adult plant resistance to Stagonospora nodorum in wheat. Phytopathology 98:886-893.Stagonospora nodorum blotch (SNB) caused by Stagonospora nodorum is a severe disease of wheat (Triticum aestivum) in many areas of the world. S. nodorum affects both seedling and adult plants causing necrosis of leaf and glume tissue, inhibiting photosynthetic capabilities, and reducing grain yield. The aims of this study were to evaluate disease response of 280 doubled haploid (DH) individuals derived from a cross between resistant (6HRWSN125) and susceptible (WAWHT2074) genotypes, compare quantitative trait loci (QTL) for seedling and adult plant resistance in two consecutive years, and assess the contribution of QTL on grain weight. Flag leaves and glumes of individuals from the DH population were inoculated with mixed isolates of S. nodorum at similar maturity time to provide accurate disease evaluation independent of morphological traits and identify true resistance for QTL analysis. Fungicide protected and inoculated plots were used to measure relative grain weight (RGW) as a yield-related trait under pathogen infection. The lack of similar QTL and little or no correlation in disease scores indicate different genes control seedling and adult plant disease and independent genes control flag leaf and glume resistance. This study consistently identified a QTL on chromosome 2DL for flag leaf resistance (QSnl.daw-2D) and 4BL for glume resistance (QSng.daw-4B) from the resistant parent, 6HRWSN125, explaining 4 to 19% of the phenotypic variation at each locus. A total of 5 QTL for RGW were consistently detected, where two were in the same marker interval for QSnl.daw-2D and QSng.daw-4B indicating the contribution of these QTL to yield related traits. Therefore, RGW measurement in QTL analysis could be used as a reliable indicator of grain yield affected by S. nodorum infection.

show abstract

Section: Additional Abstract: Phaeosphaeria Nodorum Pleiotropymentioning

confidence: 99%

Quantitative Trait Loci for Seedling and Adult Plant Resistance to Stagonospora nodorum in Wheat

Shankar¹,

Walker²,

Golzar³

et al. 2008

Phytopathology®

View full text Add to dashboard Cite

show abstract

“…Inoculum was prepared using a modiWed method of Ma and Hughes (1995). Cultures were grown at room temperature on V8-agar medium (150 ml V8-juice, 15 g agar, 1.5 g CaCO 3 , and 850 ml distilled water) in 10-cm-diameter Petri dishes under continuous illumination provided by 25-W cool-white Xuorescent tubes.…”

Section: Inoculum Preparation and Disease Screeningmentioning

confidence: 99%

“…However, a level of gene-for-gene interaction was demonstrated with selected host genotypes inoculated under controlled environments (Arseniuk et al 1999). Monogenic control of resistance to SNB was described in some wheat materials (Kleijer et al 1977;Ma and Hughes 1995;Murphy et al 2000;Feng et al 2004;Liu et al 2004a;Singh et al 2008). Aguilar et al (2005) described up to 11 QTLs in a population developed from a cross between the winter wheats 'Forno', and 'Oberkulmer' spelt.…”

Section: Introductionmentioning

confidence: 99%

A quantitative trait locus on chromosome 5B controls resistance of Triticum turgidum (L.) var. diccocoides to Stagonospora nodorum blotch

et al. 2008

View full text Add to dashboard Cite

Stagonospora nodorum blotch (SNB) is an important foliar disease of durum wheat (Triticum turgidum var. durum) worldwide. The combined eVects of SNB and tan spot, considered as components of the leaf spotting disease complex, result in signiWcant damage to wheat production in the northern Great Plains of North America. The main objective of this study was the genetic analysis of resistance to SNB caused by Phaeosphaeria nodorum in tetraploid wheat, and its association with tan spot caused by Pyrenophora tritici-repentis race 2. The 133 recombinant inbred chromosome lines (RICL) developed from the cross LDN/LDN(Dic-5B) were evaluated for SNB reaction at the seedling stage under greenhouse conditions. Molecular markers were used to map a quantitative trait locus (QTL) on chromosome 5B, explaining 37.6% of the phenotypic variation in SNB reaction. The location of the QTL was 8.8 cM distal to the tsn1 locus coding for resistance to P. tritici-repentis race 2. The presence of genes for resistance to both SNB and tan spot in close proximity in tetraploid wheat and the identiWcation of molecular markers linked to these genes or QTLs will be useful for incorporating resistance to these diseases in wheat breeding programs.

show abstract

“…Cytogenetic analyses for Stagonospora glume blotch resistance identified 16 chromosomes in the hexaploid wheat genome contributing to resistance in different lines and populations (Kleijer et al 1977;Dzieglo 1985, 1987;Auriau et al 1988;Nicholson et al 1993;Ma and Hughes 1995;Hu et al 1996). So far, no QTLs for Stagonospora blotch resistance have been reported.…”

Section: Introductionmentioning

confidence: 99%

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

Schnurbusch

Paillard

Fossati³

et al. 2003

Theor Appl Genet

View full text Add to dashboard Cite

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.

show abstract

Genetic control and chromosomal location of Triticum timopheevii-derived resistance to septoria nodorum blotch in durum wheat

Cited by 44 publications

References 22 publications

Quantitative Trait Loci for Seedling and Adult Plant Resistance to Stagonospora nodorum in Wheat

Quantitative Trait Loci for Seedling and Adult Plant Resistance to Stagonospora nodorum in Wheat

A quantitative trait locus on chromosome 5B controls resistance of Triticum turgidum (L.) var. diccocoides to Stagonospora nodorum blotch

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

Contact Info

Product

Resources

About