The Distribution and Frequency of Virulence Genes in Geographically Separated Populations of<i>Leptosphaeria nodorum</i>

Scharen, A. L.; Eyal, Z.; Huffman, M. D.; Prescott, J.M.

doi:10.1094/phyto-75-1463

Cited by 27 publications

(17 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No pathogenic races of P. nodorum have been convincingly reported, but signiWcant variation in aggressiveness in the fungal population has been observed (Krupinsky 1997;Scharen et al 1985;. The majority of genetic studies (Bostwick et al 1993;Du et al 1999;Ecker et al 1989;Fried and Meister 1987;Nelson and Gates 1980;Scott et al 1982;Wicki et al 1999b) reported that the genetic basis of resistance to SNB in wheat is quantitatively inherited.…”

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

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

show abstract

“…No clearly defined physiological races of P. nodorum have been reported, but variation in aggressiveness in the fungal population was observed (Scharen et al 1985;Krupinsky 1997). Some level of gene-for-gene interaction was demonstrated in studies with selected host genotypes inoculated under controlled environments with selected isolates (Arseniuk and Czembor 1999).…”

Section: Introductionmentioning

confidence: 99%

Chromosomal location of genes for seedling resistance to tan spot and Stagonospora nodorum blotch in tetraploid wheat

et al. 2006

View full text Add to dashboard Cite

Tan spot and Stagonospora nodorum blotch caused by Pyrenophora tritici-repentis (Died.) Drechs. and Phaeosphaeria nodorum (E. Mü ller) Hedjarroude, respectively, are the major components of the leaf spotting disease complex of durum wheat (Triticum turgidum L.). These diseases induce significant quality and yield reductions and control through host plant resistance is the most effective and economical method. The objectives of this study were to determine the chromosomal locations of major genes conferring resistance to P. tritici-repentis races 1-3 and 5, toxins Ptr ToxA and Ptr ToxB, and P. nodorum isolate Sn2000 in a set of Langdon-Triticum dicoccoides (Israel A) durum substitution lines. Plants were evaluated for disease reaction at the two-leaf stage under controlled environmental conditions. Based on the reactions of the substitution lines, the chromosomal locations of the resistance genes for P. tritici-repentis races 1 and 2, and 3 and 5, were determined to be chromosomes 5B and 3B, respectively. Resistance to toxin Ptr ToxA was located on chromosome 5B whereas toxin Ptr ToxB failed to induce symptoms in the tetraploid genotypes, including the substitution lines. Resistance to P. nodorum isolate Sn2000 was located on chromosome 5B. This is the first study to reveal the chromosomal locations of major genes for resistance to tan spot and Stagonospora nodorum blotch in tetraploid wheat using the Langdon-T. dicoccoides (Israel A) substitution lines.

show abstract

“…Other studies revealing similar difficulties placed non classifying isolates into physiological races (Narvaez, 1957;Morales, 1958;Arjona et al, 1976;Scharen et al, 1985).…”

Section: Inoculation and Evaluationmentioning

confidence: 92%

Variation in virulence of Septoria tritici Rob ex Desm isolates on wheat

et al. 1991

View full text Add to dashboard Cite

The Distribution and Frequency of Virulence Genes in Geographically Separated Populations ofLeptosphaeria nodorum

Cited by 27 publications

References 0 publications

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

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

Chromosomal location of genes for seedling resistance to tan spot and Stagonospora nodorum blotch in tetraploid wheat

Variation in virulence of Septoria tritici Rob ex Desm isolates on wheat

Contact Info

Product

Resources

About