Genetics of resistance to septoria tritici blotch in the Portuguese wheat breeding line TE 9111

Chartrain, Laëtitia; Joaquim, P.; Berry, Simon; Arraiano, L. S.; Azanza, F.; Brown, J. K. M.

doi:10.1007/s00122-005-1945-4

Cited by 65 publications

(59 citation statements)

References 28 publications

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“…Avirulence to TE 9111 was identified in three isolates from Khuzestan and one isolate from East Azarbaijan. Stb6, Stb7 and Stb11 genes have been reported in TE 9111 (Chartrain et al 2005c), however, as mentioned above, Stb6 and Stb7 could not be effective against avirulent isolates. Among differentials, Arina and Flame were the most resistant differential wheat genotypes.…”

Section: Discussionmentioning

confidence: 90%

Resistance spectra of wheat genotypes and virulence patterns of Mycosphaerella graminicola isolates in Iran

et al. 2011

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Co-evolution of wheat and its devastating pathogen Mycosphaerella graminicola (anamorph Septoria tritici), the causal agent of septoria tritici blotch, a foliar disease of wheat, is suggested to occur in Fertile Crescent as their center of origin and, thus, interaction between pathogen virulence and host resistance is important subject to be addressed. We have investigated resistance spectra of 54 wheat genotypes including a set of differentials carrying known resistance genes and virulence patterns of 14 M. graminicola isolates at seedling stage under controlled environmental conditions. The isolates were collected in Iran from five provinces. Diversity in virulence and aggressiveness was observed among the isolates from four provinces. Isolates collected from Golestan province were virulent to all wheat genotypes from germplasm of Iran, while specific resistances were identified to the isolates from other provinces. Among wheat genotypes, cvs. Chamran, Morvarid and Hirmand had the greatest number of specific resistances as well as partial resistance. Wheat genotypes of the differential set also differed in their reactions to the isolates. Arina, Flame and TE 9111 were specifically resistant to the greatest number of isolates from different provinces. Most isolates were virulent to the other differentials such as cvs. Shafir, Estanzuela federal and Courtot indicating that extensive adaption of virulence to most of the known resistance genes (Stb) has occurred in these regions. The new sources of resistance to highly virulent isolates from Iran may also be utilized in wheat breeding programs to develop resistant cultivars against pathogen populations in other countries.

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Section: Discussionmentioning

confidence: 90%

Resistance spectra of wheat genotypes and virulence patterns of Mycosphaerella graminicola isolates in Iran

et al. 2011

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“…It is possible that a damaging epidemic requires more rain for cultivars with disease escape characteristics resulting from canopy and crop structure, compared to susceptible cultivars (Lovell et al 2004b). Resistance to the pathogen per se may reduce the reproduction rate of M. graminicola (Chartrain et al 2005). This may mean more spores (through dispersal) are needed to cause a similar infection compared to a susceptible cultivar.…”

Section: Discussionmentioning

confidence: 98%

“…In wheat, the position of the leaves (e.g. distance between nodes) may prevent pathogen dispersal (Lovell et al 2004b), or resistance genes may be present (Chartrain et al 2005). The effect of cultivar resistance was therefore examined in the analysis.…”

Section: Datamentioning

confidence: 99%

A predictive model for early-warning of Septoria leaf blotch on winter wheat

Beest

Shaw

Pietravalle³

et al. 2009

Eur J Plant Pathol

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Disease-weather relationships influencing Septoria leaf blotch (SLB) preceding growth stage (GS) 31 were identified using data from 12 sites in the UK covering 8 years. Based on these relationships, an early-warning predictive model for SLB on winter wheat was formulated to predict the occurrence of a damaging epidemic (defined as disease severity of 5% or > 5% on the top three leaf layers). The final model was based on accumulated rain > 3 mm in the 80-day period preceding GS 31 (roughly from early-February to the end of April) and accumulated minimum temperature with a 0°C base in the 50-day period starting from 120 days preceding GS 31 (approximately January and February). The model was validated on an independent data set on which the prediction accuracy was influenced by cultivar resistance. Over all observations, the model had a true positive proportion of 0.61, a true negative proportion of 0.73, a sensitivity of 0.83, and a specificity of 0.18. True negative proportion increased to 0.85 for resistant cultivars and decreased to 0.50 for susceptible cultivars. Potential fungicide savings are most likely to be made with resistant cultivars, but such benefits would need to be identified with an in-depth evaluation.

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“…They were: Stb1 located on the chromosome 5BL [27], Stb2 on the chromosome 3BS [28], Stb3 on the chromosome 6DS [29], Stb4 on the chromosome 7DS [30]; Stb5 on the chromosome 7DS [31]; Stb6 on the chromosome 3AS [32]; Stb7 on the chromosome 4AL [33]; Stb8 on the chromosome 7BL [34]; Stb 9 on the chromosome 2B [35], Stb10 on the chromosome 1D [36]. Stb 11 on the chromosome 1BS [37], Stb12, on the chromosome 4AL [36], Stb13 on the chromosome 7BL [38], Stb14 on the chromosome 3BS [38], Stb15 on the chromosome 6AS [39], Stb16 on the chromosome 3D [40], Stb17 on the chromosome 5A [41] and Stb 18 on the chromosome 6DS [42]. In addition, several QTL were also found.…”

Section: The Use Of Fungicides In the Integrated Foliar Disease Managmentioning

confidence: 99%

Recent Advances on Integrated Foliar Disease Management with Special Emphasis in Argentina Wheat Production

Simón¹,

Fleitas²,

Schalamuk³

2013

Fungicides - Showcases of Integrated Plant Disease Management From Around the World

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Genetics of resistance to septoria tritici blotch in the Portuguese wheat breeding line TE 9111

Cited by 65 publications

References 28 publications

Resistance spectra of wheat genotypes and virulence patterns of Mycosphaerella graminicola isolates in Iran

Resistance spectra of wheat genotypes and virulence patterns of Mycosphaerella graminicola isolates in Iran

A predictive model for early-warning of Septoria leaf blotch on winter wheat

Recent Advances on Integrated Foliar Disease Management with Special Emphasis in Argentina Wheat Production

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