<i>Puccinia striiformis</i> f.sp. <i>tritici</i> in Australasia: pathogenic changes during the first 10 years

Wellings, C. R.; McIntosh, R. A.

doi:10.1111/j.1365-3059.1990.tb02509.x

Cited by 234 publications

(139 citation statements)

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“…The 'world-set' and the 'European set' each comprised eight differential lines (Stubbs, 1985). Moreover, Kema and Lange (1992) proposed incorporating Yr15 in the differential set of cultivars through extension of the 'world set', and a similar suggestion for Yr5 by Wellings & McIntosh (1990) was adopted here. In addition, Stubbs (1988) suggested Kalyansona (Yr2) and Federation *4/Kavkaz (Yr9) and Bariana and McIntosh (1994) proposed another differential cultivar, VPM1 (Yr17) to be included as supplemental differential sets for yellow rust.…”

Section: Differential Linesmentioning

confidence: 99%

Yellow Rust Resistance in Advanced Lines and Commercial Cultivars of Bread Wheat from Ethiopia

Badebo¹,

Assefa²,

Fehrmann³

2008

East African Journal of Sciences

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Bread wheat (Triticum aestivum L.) cultivars often succumb to yellow rust (Puccinia striiformis f.sp. tritici Westend.) soon after their release for commercial production, especially in the highlands of south-eastern Ethiopia. Variety diversification may buffer the ever evolving new races of the yellow rust pathogen. The objective of this study was to characterize seedling yellow rust resistance in 21 advanced bread wheat lines and 20 cultivars from Ethiopia. Yellow rust infection types (ITs) produced on test wheat lines and cultivars from nine yellow rust races were compared with ITs produced on standard differential lines that differed for specific yellow rust resistance genes. The experiment was conducted at seedling stage under greenhouse conditions in Goettingen, Germany during 2001. The result indicated that most of the advanced bread wheat lines possess different yellow rust resistance genes when compared to the commercial cultivars. Seedling genes Yr1, Yr2, Yr3V, Yr4, Yr6 and Yr17 with or without Yr9 were postulated to be present in 11 advanced lines. However, only Yr7 and Yr9 were postulated to be present in five of the commercial bread wheat cultivars. The newly identified resistance sources could be of great importance for enhancing the genetic base of resistance of bread wheat to yellow rust in Ethiopia.

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Section: Differential Linesmentioning

confidence: 99%

Yellow Rust Resistance in Advanced Lines and Commercial Cultivars of Bread Wheat from Ethiopia

Badebo¹,

Assefa²,

Fehrmann³

2008

East African Journal of Sciences

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“…Two types of resistance have been identified in several cereal-rust pathosystems: hypersensitive or qualitative (race specific) and quantitative (race-nonspecific) resistance. Race-specific resistance is highly effective but not durable because cultivars with such a type of resistance often become susceptible within a few years of release either as a consequence of selecting previously rare races or as a consequence of the development of new races (Wellings and McIntosh 1990;Line and Qayoum 1992;Chen 2005Chen , 2007. Conversely, race-nonspecific resistance is mainly polygenic and is known to be long-lasting and more durable (Herrera-Fossel et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Appraisal of wheat germplasm for adult plant resistance against stripe rust

Saleem¹,

Arshad²,

Shokat³

et al. 2015

Journal of Plant Protection Research

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Abstract:The resurgence of wheat stripe rust is of great concern for world food security. Owing to resistance breakdown and the appearance of new virulent high-temperature adapted races of Puccinia striiformis f. sp. tritici (Pst), many high yielding commercial varieties in the country lost their yield potential. Searching for new sources of resistance is the best approach to mitigate the problem. Quantitative resistance (partial or adult plant) or durable resistance is reported to be more stable than race specific resistance. In the current perusal, severity. There were 21 lines which were immune (no disease), 16 which were resistant, five moderately resistant, two resistant-to-moderately resistant, one moderately resistant-to-moderately susceptible, 5 moderately susceptible-to-susceptible, one moderately susceptible, and six exhibited a susceptible response. Nevertheless, 51 lines exhibited a high level of partial resistance while the three lines, NW-5--1212-1, NW-7-30-1, and NW-7-5 all showed a moderate level of partial resistance based on FRS, while 54 lines, on the basis of AURPC and rAURPC, were identified as conferring a high level of partial resistance. Moreover, adult plant resistance was conferred by 47 wheat lines, based on CI value. It was striking that, 13 immune lines among 21 were derived from parents of CIMMYT origin. Cluster analysis was executed to determine the diversity among the wheat genotypes based on stripe rust resistance and yield parameters. All genotypes were grouped into nine clusters exhibiting a high level of diversity at a 25% linkage distance. There were 29 wheat lines resistant to stripe rust that were grouped into the first three clusters, while 4 high-yielding lines were in Cluster VIII. The susceptible check, Morocco, was separated from rest of lines and fell in the last cluster i.e. Cluster IX. Based on the results, inter-crossing immune/ resistant lines is recommended, and with high yielding lines − it is also recommended that cultivars with improved disease resistance and yield potential be developed.

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“…The first response to the incursion, which caused heavy losses in some of the most widely grown varieties such as Zenith, was to deploy vertical resistance genes (YrA and Yr6). However, the effectiveness of these genes was lost very rapidly (Wellings & McIntosh, 1990). It was observed that some wheat varieties such as Condor, Egret and Olympic, although clearly susceptible at the seedling stage, showed varying degrees of adult-plant resistance and suffered much lower losses than the very susceptible varieties such as Zenith (McIntosh & Wellings, 1986).…”

Section: Resistance To Stem Rust and Stripe Rust In Wheatmentioning

confidence: 99%

Horizontal or Generalized Resistance to Pathogens in Plants

Keane¹

2012

Plant Pathology

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Puccinia striiformis f.sp. tritici in Australasia: pathogenic changes during the first 10 years

Cited by 234 publications

References 10 publications

Yellow Rust Resistance in Advanced Lines and Commercial Cultivars of Bread Wheat from Ethiopia

Yellow Rust Resistance in Advanced Lines and Commercial Cultivars of Bread Wheat from Ethiopia

Appraisal of wheat germplasm for adult plant resistance against stripe rust

Horizontal or Generalized Resistance to Pathogens in Plants

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