Avoidance of leaf rust fungi in wild relatives of cultivated cereals

Rubiales, Diego; Ramı́rez, Manuel; Niks, Rients E.

doi:10.1007/bf00022958

Cited by 12 publications

(3 citation statements)

References 8 publications

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“…A low number of rust-resistant H. spontaneum L. accessions in other collections was also reported by Sallam et al [ 55 ]. H. marinum , on the other hand, was resistant to the disease, as already described in 1996 by Rubiales et al [ 40 ], indicating that the H. marinum suppression of appressorium formation had not been investigated to any significant extent until now. We can confirm that H. marinum represents a source of genes that confer resistance to Puccinia hordei , and that our genotypes can be exploited for this purpose.…”

Section: Discussionmentioning

confidence: 74%

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Exploring Wild Hordeum spontaneum and Hordeum marinum Accessions as Genetic Resources for Fungal Resistance

Ovesna,

Chrpova,

Kolarikova

et al. 2023

Plants

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Crop Wild Relatives (CWRs), as potential sources of new genetic variants, are being extensively studied to identify genotypes that will be able to confer resistance to biotic stresses. In this study, a collection of barley wild relatives was assessed in the field, and their phenotypic variability was evaluated using a Barley Description List, reflecting the identified ecosites. Overall, the CWRs showed significant field resistance to various fungal diseases. To further investigate their resistance, greenhouse tests were performed, revealing that several CWRs exhibited resistance against Fusarium culmorum, Pyrenophora teres, and Puccinia hordei G.H. Otth. Additionally, to characterize the genetic diversity within the collection, DNA polymorphisms at 21 loci were examined. We successfully employed barley-specific SSR markers, confirming their suitability for identifying H. spontaneum and even H. marinum, i.e., perennial species. The SSR markers efficiently clustered the investigated collection according to species and ecotypes, similarly to the phenotypic assessment. Moreover, SSR markers associated with disease resistance revealed different alleles in comparison to those found in resistant barley cultivars. Overall, our findings highlight that this evaluated collection of CWRs represents a valuable reservoir of genetic variability and resistance genes that can be effectively utilized in breeding programs.

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Section: Discussionmentioning

confidence: 74%

“…The others were rated as being moderately resistant. Field resistance to fungal diseases in CWRs has previously been reported by several authors [40][41][42]. Therefore, the set of CWRs was further tested for resistance to other fungal diseases in greenhouse tests.…”

Section: Discussionmentioning

confidence: 99%

Exploring Wild Hordeum spontaneum and Hordeum marinum Accessions as Genetic Resources for Fungal Resistance

Ovesna,

Chrpova,

Kolarikova

et al. 2023

Plants

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show abstract

“…Also, although we observed a tendency for lower resistance in octoploid than in hexaploid accessions, these differences were not significant. There are also tritordeum lines resistant to yellow rust ( P. striiformis ) and stem rust ( P. graminis ), as well as lines giving moderate levels of resistance to Septoria glume blotch ( Phaeosphaeria nodorum ), and Fusarium head blight ( Fusarium culmorum ) (Rubiales et al. 1991, 1996b,c, 2001).…”

Section: Discussionmentioning

confidence: 99%

Identification of resistance to tan spot (Pyrenophora tritici‐repentis) in Hordeum chilense and its expression in its amphiploids with diploid, tetraploid and hexaploid Triticum species

Sillero

Rubiales

2012

Plant Breeding

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With 4 tables Abstract Hordeum chilense Roem. et Schult. is a native South American diploid wild barley with high potential for cereal breeding purposes, given its high crossability with other members of the Triticeae tribe. Amphiploids have been obtained from crosses of H. chilense with diploid, tetraploid and hexaploid Triticum species that have been postulated as a potential new crop named tritordeum or as bridges to transfer useful genes to cultivated cereals. In this paper we describe resistance in H. chilense to tan spot disease, caused by Pyrenophora tritici‐repentis (Died.) Drechs. Twenty‐two tritordeum lines together with their wheat and H. chilense parents were inoculated with three different races of P. tritici‐repentis. While all H. chilense accessions studied were resistant, wheat accessions response ranged from susceptibility to high resistance. The two tetraploid tritordeum accessions studied were very resistant as was their T. tauschii (Coss.) Schmalh. parent line. Hexa‐ and octoploid tritordeum accessions were more resistant than their parental wheat accessions. Consequently, H. chilense appears as a good reservoir of resistance to P. tritici‐repentis, accessible for wheat breeding.

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Avoidance of rust infection by some genotypes ofHordeum chilensedue to their relative inability to induce the formation of appressoria

Rubiales

Niks

1996

Physiological and Molecular Plant Pathology

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Avoidance of leaf rust fungi in wild relatives of cultivated cereals

Cited by 12 publications

References 8 publications

Exploring Wild Hordeum spontaneum and Hordeum marinum Accessions as Genetic Resources for Fungal Resistance

Exploring Wild Hordeum spontaneum and Hordeum marinum Accessions as Genetic Resources for Fungal Resistance

Identification of resistance to tan spot (Pyrenophora tritici‐repentis) in Hordeum chilense and its expression in its amphiploids with diploid, tetraploid and hexaploid Triticum species

Avoidance of rust infection by some genotypes ofHordeum chilensedue to their relative inability to induce the formation of appressoria

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