Epidemic Spread of Barley Stripe Rust in South America

Dubin, H. J.; Stubbs, R. W.

doi:10.1094/pd-70-141

Cited by 69 publications

(39 citation statements)

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“…hordei) in barley (Hordeum vulgare) occurs worldwide and is a major disease in various parts of South, Central and North America (Dubin and Stubbs 1986;Chen et al 1994;Roelfs and Huerta-Espino 1994;Sandoval-Islas et al 1998). There are different strategies for controlling the disease, but genetic resistance is the more economically and environmentally appropriate option (Broers and Jacobs 1989).…”

Section: Introductionmentioning

confidence: 99%

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

et al. 2006

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Sixteen barley cultivars with a susceptible infection type (IT = 7-8) in the seedling stage to an isolate of race 24 of Puccinia striiformis f. sp. hordei were planted at two locations in Mé xico. Disease severity (DS) parameters were assessed for the flag leaf and for the upper three leaves. The cultivars represented at least five levels of quantitative resistance ranging from very susceptible to quite resistant. ''Granado'', ''Gloria/Copal'' and ''Calicuchima-92'' represented the most resistant group and had an IT of 7 or 8. The cultivar · environment interaction variance, although significant, was very small compared with the cultivar variance. The disease severity parameters were highly correlated. The monocyclic parameter DS m , measured when the most susceptible cultivar had reached its maximum DS, was very highly correlated with the area under the disease progress curve (AUDPC), r being 0.98.Components of quantitative resistance were evaluated in two plant stages. In the seedling stage small cultivar effects for the latency period were observed, which were not correlated with the quantitative resistance measured in the field. In the adult plant stage the latency period (LP), infection frequency (IF) and colonization rate (CR) were measured in the upper two leaves. The LP was much longer than in the seedling stage and differed strongly between cultivars. The differences in IF were too large, those in CR varied much less. The components showed association with one another. The LP and IF were well correlated with the AU-DPC (r = 0.7-0.8).

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Section: Introductionmentioning

confidence: 99%

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

et al. 2006

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“…Barley stripe rust caused significant problems in winter barley production, particularly in the UK and The Netherlands in the 1960s (RW Stubbs pers com). The introduction and spread of Psh race 24 in Colombia in 1975, and its adaptation and dispersal throughout South America in the 1980s caused crop losses approaching 70% in some regions (Dubin and Stubbs 1986). The disease subsequently spread northwards into Mexico, Texas and western USA resulting in seasonal epidemics and significant economic losses (Marshall and Sutton 1995).…”

Section: Tritici [Pst])mentioning

confidence: 99%

Global status of stripe rust: a review of historical and current threats

2011

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Stripe rust, caused by Puccinia striiformis, has been an important disease of wheat, barley, rye, triticale and certain graminaceous hosts for centuries. The significance of the disease on cultivated cereals has waxed and waned according to the vagaries of climate, inoculum levels and susceptible varieties. A progressive understanding of pathogen biology has revealed levels of specialisation between and within host groups, and these had varying impacts on the hosts concerned. The most economically important form is P. striiformis f. sp. tritici (Pst), the causal pathogen of stripe (yellow) rust of wheat, which is the major focus of this paper. The recent discovery of the perfect stage of Pst on Berberis spp. will encourage further work to uncover the potential importance of the sexual stage in pathogen biology in regions where Berberis spp. occur. A review of the evolution of pathotypes within Pst over the past 50 years reveals recurrent

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“…They were planted in unreplicated double rows, 1 m in length. A field epidemic was initiated by inoculating spreader rows (comprised of 15 extremely susceptible barley genotypes) with a stripe rust isolate presumed to be characteristic of race 24 as described by Dubin and Stubbs (1986). Disease severity was rated at DGS59 (Feekes stage 10.5) as a percentage of leaf area affected on a whole plot basis.…”

Section: Phenotypingmentioning

confidence: 99%

“…The form of the pathogen specialised on barley (Puccinia striiformis f. sp. hordei, Psh) has been a major threat to barley production in the United States, South America, and central Europe since the 1960s (Dubin and Stubbs 1986;Marshall and Sutton 1995). Under severe conditions, yield losses of up to 70% have been reported in barley (Dubin and Stubbs 1986).…”

Section: Introductionmentioning

confidence: 99%

“…hordei, Psh) has been a major threat to barley production in the United States, South America, and central Europe since the 1960s (Dubin and Stubbs 1986;Marshall and Sutton 1995). Under severe conditions, yield losses of up to 70% have been reported in barley (Dubin and Stubbs 1986). Stripe rust is a potential threat to the barley industry in many production areas of the world, including Australia, where it is not currently present.…”

Section: Introductionmentioning

confidence: 99%

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Molecular mapping as a tool for pre-emptive breeding for resistance to the exotic barley pathogen, Puccinia striiformis f. sp. hordei

Çakır¹,

Spackman²,

Wellings³

et al. 2003

Aust. J. Agric. Res.

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Abstract. Barley stripe rust (BSR), caused by Puccinia striiformis f. sp. hordei, has been a major disease problem to the barley industry worldwide that has not, to date, been detected in Australia. This paper describes the mapping of stripe rust resistance genes in Tallon/Kaputar (TK) and Arapiles/Franklin (AF) populations. The paper also reports on the usefulness of markers associated with alternative sources of resistance previously identified in the varieties Orca and Shyri in the USA. Stripe rust screening was conducted at the adult plant stage in Toluca, Mexico, for 2 years. Two major quantitative trait loci (QTLs) were found on chromosomes 2H and 5H in both populations. One region on chromosome 5H was highly significantly associated with resistance to stripe rust (R 2 = 68% and 34% in TK and AF, respectively). The QTL on chromosome 2H accounted for 36% of the variation in TK and 10% of the variation in the AF population. These associations were consistent over both years. Further work will involve screening for additional markers in the target regions to identify polymorphism that can be used to select for multiple resistances in the absence of the pathogen.A R 0 2 2 3 1 M a p p i n g g e n e s f o r s t r i p e r e s i s t a n c e i n b a r l e y M . C a k i r e t a l .

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Epidemic Spread of Barley Stripe Rust in South America

Cited by 69 publications

References 0 publications

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

Quantitative resistance and its components in 16 barley cultivars to yellow rust, Puccinia striiformis f. sp. hordei

Global status of stripe rust: a review of historical and current threats

Molecular mapping as a tool for pre-emptive breeding for resistance to the exotic barley pathogen, Puccinia striiformis f. sp. hordei

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