The genetic basis of scald resistance in western Canadian barley cultivars

Penner, G.B.; Tekauz, A.; Reimer, Elsa; Scoles, G. J.; Rossnagel, B. G.; Eckstein, P. E.; Legge, W. G.; Burnett, P. A.; Ferguson, T.; Helm, J. H.

doi:10.1007/bf00037121

Cited by 24 publications

(6 citation statements)

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“…Several molecular markers for most of the known Rhynchosporium resistance genes have been described; for the Rrs1 locus on 3H: HVS3 (Genger et al 2003a), cMWG680 (Graner and Tekauz 1996), Bmac209 (Grønnerød et al 2002), Falc666 (Penner et al 1996); for Rrs4 on 3H: HVM60 (Patil et al 2003); for Rrs12 on 7HS: Bmag7 (Genger et al 2003b); for Rrs13 on 6HS: Cxp3 (Abbott et al . 1995), MWG916 (Genger et al 2003b); for Rrs14 on 1HS: Hor2 (Garvin et al 2000); for Rrs15 CI8288 on 2HS: (Schweizer et al 2004); for Rrs15 on 7HL:…”

Section: Introductionmentioning

confidence: 99%

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

et al. 2009

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Section: Introductionmentioning

confidence: 99%

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

et al. 2009

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“…Single dominant genes controlling scald resistance have been identified (Shipton et al 1974;Penner et al 1996). Pickering et al (1987) proposed that line 4176n possesses a single dominant gene for scald resistance; however, no data were provided.…”

Section: Discussionmentioning

confidence: 99%

Inheritance of scald resistance from barley lines 4176/10/n/3/2/6 and 145L2

Singh¹,

Rossnagel²,

Scoles³

et al. 2003

Can. J. Plant Sci.

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Scald incited by Rhynchosporium secalis (Oud.) J.J. Davis is an important fungal foliar disease of barley (Hordeum vulgare L.) that can cause significant yield and quality losses. While application of fungicides and/or cultural practices are possible control methods, the use of genetic resistance is a very desirable control strategy. Two New Zealand barley lines, 4176/10/n/3/2/6 and 145L2, derived from interspecific crosses, were evaluated in scald nurseries at Lacombe and Edmonton, AB, in 1998 and exhibited a high level of resistance. The objectives of this study were to further evaluate the level of resistance in these lines under western Canadian conditions and to study the inheritance of that resistance. Lines 4176/10/n/3/2/6 and 145L2 were each crossed with the scald susceptible cultivars CDC McGwire and RFLP Harrington. A scald screening nursery at Lacombe, AB, was utilized for disease testing in 1999 and nurseries at Lacombe and Edmonton, AB, were used in 2000. The F1 and F2 generations of all resistant/susceptible crosses were evaluated in 1999. One hundred F4:5 recombinant inbred lines from each cross were evaluated in replicated trials in 2000. Lines 4176/10/n/3/2/6 and 145L2 were resistant in all trials and resistant/susceptible populations segregated for single gene control of resistance in the F2 and F4:5 generations. Chi square analysis indicated that they possess a single dominant gene for resistance. These two lines should provide simply inherited sources of scald resistance for western Canada. Key words: Scald, barley, inheritance, resistance, Rhynchosporium secalis

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“…'Hudson' and 'Atlas 46', the latter possessing a similar but broader spectrum of resistance genes than Atlas (Tekauz 1995), were included in the group of accessions. This was based on the assumption by Penner et al (1996) that the majority of resistant cultivars released from western Canadian breeding programs were similar to 'Hudson' or Atlas in terms of scald reactions. Penner et al (1996) considered that 'CDC Earl' had a 'Hudson'-type resistance.…”

Section: Discussionmentioning

confidence: 99%

“…This was based on the assumption by Penner et al (1996) that the majority of resistant cultivars released from western Canadian breeding programs were similar to 'Hudson' or Atlas in terms of scald reactions. Penner et al (1996) considered that 'CDC Earl' had a 'Hudson'-type resistance. While 'Hudson' was found to be highly resistant in the present study, nearly a quarter of the isolates tested were virulent on 'CDC Earl', indicating that resistance in 'CDC Earl' was not the same as that in 'Hudson'.…”

Section: Discussionmentioning

confidence: 99%

Pathogenic variation ofRhynchosporium secalisin Alberta

Turkington

Helm

et al. 2002

Canadian Journal of Plant Pathology

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Leaf samples with scald symptoms were taken from various barley cultivars in 1997 and 1998 at nine locations in Alberta for examination of pathogenic variability. Two hundred and fifty-six single-spore isolates of Rhynchosporium secalis were differentiated into 52 pathotypes using 12 differentials, which consisted of seven accessions with major resistance genes and five commercial cultivars. Fifty-two percent of isolates were virulent on cv. Harrington only (pathotype 1); five pathotypes, consisting of close to 25% of isolates, were virulent only on 4 of 5 commercial cultivars; and about 45 pathotypes, consisting of about 25% of isolates, were virulent on commercial cultivars and accessions. No differential was resistant to all pathotypes, and many pathotypes were represented by single isolates. There was a difference in pathotype diversity and complexity among locations in Alberta. Calmar, Lacombe, and Edmonton sites comprised the greatest number of pathotypes that were virulent on up to seven differentials; at the Beaverlodge, Carstairs, Stettler, and Westlock sites, pathotype 1 comprised more than 60% of total isolates with a few other pathotypes. The Trochu and Vegreville sites were intermediate in the number of pathotypes. Discriminant analysis based on the reactions of the 12 differentials also showed divergence in R. secalis virulence among locations. Pathogenic variability associated with location in Alberta is important in the context of breeding for resistance and use of the most resistant cultivars by producers.Résumé : En 1997 et 1998 en Alberta, des échantillons de feuille avec des symptômes de rhynchosporiose furent récoltés sur divers cultivars d'orge à neuf endroits en vue d'examiner la variabilité pathogène. Deux cent cinquante-six isolats monosporiques du Rhynchosporium secalis furent différenciés en 52 pathotypes à l'aide de 12 populations différentielles, dont sept obtentions possédant des gènes de résistance majeurs et cinq cultivars commerciaux. Cinquante-deux pour cent des isolats étaient virulents seulement sur le cv. Harrington (pathotype 1); cinq pathotypes englobant presque 25% des isolats étaient virulents seulement sur 4 des 5 cultivars commerciaux et environ 45 pathotypes englobant environ 25% des isolats étaient virulents sur les cultivars commerciaux et sur les obtentions. Aucune des plantes différentielles n'étaient résistante à tous les pathotypes et plusieurs pathotypes étaient représentés par des isolats uniques. Il y avait une différence dans la diversité et la complexité des pathotypes entre les emplacements en Alberta. Les sites de Calmar, de Lacombe et d'Edmonton comprenaient le plus grand nombre de pathotypes virulents sur jusqu'à sept populations différentielles ; aux sites de Beaverlodge, de Carstairs, de Stettler et de Westlock, le pathotype 1 comprenait jusqu'à plus de 60% du total des isolats et incluait seulement quelques autres pathotypes. Les sites de Trochu et de Vegreville étaient intermédiaires quant au nombre de pathotypes. Une analyse discriminante basée sur l...

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The genetic basis of scald resistance in western Canadian barley cultivars

Cited by 24 publications

References 18 publications

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

Fine mapping, physical mapping and development of diagnostic markers for the Rrs2 scald resistance gene in barley

Inheritance of scald resistance from barley lines 4176/10/n/3/2/6 and 145L2

Pathogenic variation ofRhynchosporium secalisin Alberta

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