Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia

North American durum lines, selected for resistance to TTKSK (Ug99) and related races of Puccinia graminis f. sp. tritici in Kenya, became susceptible in Debre Zeit, Ethiopia, suggesting the presence of stem rust races that were virulent to the TTKSK-effective genes in durum. The objective of this s...

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Detalles Bibliográficos
Autores: Olivera Firpo, P.D., Jin, Y., Rouse, M.N., Badebo, A., Fetch, T., Singh, R.P., Yahyaoui, A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:México
Institución:Centro Internacional de Mejoramiento de Maíz y Trigo
Repositorio:Repositorio Institucional de Publicaciones Multimedia del CIMMYT
OAI Identifier:oai:repository.cimmyt.org:10883/2956
Acceso en línea:http://hdl.handle.net/10883/2956
Access Level:acceso abierto
Palabra clave:AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
WHEAT
RUSTS
VIRULENCE
PUCCINIA GRAMINIS
SCREENING
FIELD EXPERIMENTATION
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spelling Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in EthiopiaOlivera Firpo, P.D.Jin, Y.Rouse, M.N.Badebo, A.Fetch, T.Singh, R.P.Yahyaoui, A.AGRICULTURAL SCIENCES AND BIOTECHNOLOGYWHEATRUSTSVIRULENCEPUCCINIA GRAMINISSCREENINGFIELD EXPERIMENTATIONNorth American durum lines, selected for resistance to TTKSK (Ug99) and related races of Puccinia graminis f. sp. tritici in Kenya, became susceptible in Debre Zeit, Ethiopia, suggesting the presence of stem rust races that were virulent to the TTKSK-effective genes in durum. The objective of this study was to characterize races of P. graminis f. sp. tritici present in the Debre Zeit, Ethiopia stem rust nursery. Three races of P. graminis f. sp. tritici were identified from 34 isolates: JRCQC, TRTTF, and TTKSK. Both races JRCQC and TRTTF possess virulence on stem rust resistance genes Sr13 and Sr9e, which may explain why many TTKSK-resistant durum lines tested in Kenya became susceptible in Debre Zeit. The Sr9e-Sr13 virulence combination is of particular concern because these two genes constitute major components of stem rust resistance in North American durum cultivars. In addition to Sr9e and Sr13 virulence, race TRTTF is virulent to at least three stem rust resistance genes that are effective to race TTKSK, including Sr36, SrTmp, and resistance conferred by the 1AL.1RS rye translocation. Race TRTTF is the first known race with virulence to the stem rust resistance carried by the 1AL.1RS translocation, which represents one of the few effective genes against TTKSK in winter wheat cultivars in the United States. Durum entries exhibiting resistant to moderately susceptible infection response at the Debre Zeit nursery in 2009 were evaluated for reaction to races JRCQC, TRTTF, and TTKSK at the seedling stage. In all, 47 entries were resistant to the three races evaluated at the seedling stage, whereas 26 entries exhibited a susceptible reaction. These results suggest the presence of both major and adult plant resistance genes, which would be useful in durum-wheat-breeding programs. A thorough survey of virulence in the population of P. graminis f. sp. tritici in Ethiopia will allow characterization of the geographic distribution of the races identified in the Debre Zeit field nursery.623-628American Phytopathological Society (APS)http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-09-11-07932013-06-07T21:12:59Z2013-06-07T21:12:59Z2012info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePDFapplication/pdf0191-2917http://hdl.handle.net/10883/295610.1094/PDIS-09-11-0793596Plant Diseasereponame:Repositorio Institucional de Publicaciones Multimedia del CIMMYTinstname:Centro Internacional de Mejoramiento de Maíz y Trigoinstacron:CIMMYTEnglishEthiopiaCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.Open Accessinfo:eu-repo/semantics/openAccessoai:repository.cimmyt.org:10883/29562024-10-11T19:59:10Z
dc.title.none.fl_str_mv Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
title Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
spellingShingle Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
Olivera Firpo, P.D.
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
WHEAT
RUSTS
VIRULENCE
PUCCINIA GRAMINIS
SCREENING
FIELD EXPERIMENTATION
title_short Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
title_full Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
title_fullStr Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
title_full_unstemmed Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
title_sort Races of Puccinia graminis f. sp. tritici with combined virulence to Sr13 and Sr9e in a field stem rust screening nursery in Ethiopia
dc.creator.none.fl_str_mv Olivera Firpo, P.D.
Jin, Y.
Rouse, M.N.
Badebo, A.
Fetch, T.
Singh, R.P.
Yahyaoui, A.
author Olivera Firpo, P.D.
author_facet Olivera Firpo, P.D.
Jin, Y.
Rouse, M.N.
Badebo, A.
Fetch, T.
Singh, R.P.
Yahyaoui, A.
author_role author
author2 Jin, Y.
Rouse, M.N.
Badebo, A.
Fetch, T.
Singh, R.P.
Yahyaoui, A.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
WHEAT
RUSTS
VIRULENCE
PUCCINIA GRAMINIS
SCREENING
FIELD EXPERIMENTATION
topic AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
WHEAT
RUSTS
VIRULENCE
PUCCINIA GRAMINIS
SCREENING
FIELD EXPERIMENTATION
description North American durum lines, selected for resistance to TTKSK (Ug99) and related races of Puccinia graminis f. sp. tritici in Kenya, became susceptible in Debre Zeit, Ethiopia, suggesting the presence of stem rust races that were virulent to the TTKSK-effective genes in durum. The objective of this study was to characterize races of P. graminis f. sp. tritici present in the Debre Zeit, Ethiopia stem rust nursery. Three races of P. graminis f. sp. tritici were identified from 34 isolates: JRCQC, TRTTF, and TTKSK. Both races JRCQC and TRTTF possess virulence on stem rust resistance genes Sr13 and Sr9e, which may explain why many TTKSK-resistant durum lines tested in Kenya became susceptible in Debre Zeit. The Sr9e-Sr13 virulence combination is of particular concern because these two genes constitute major components of stem rust resistance in North American durum cultivars. In addition to Sr9e and Sr13 virulence, race TRTTF is virulent to at least three stem rust resistance genes that are effective to race TTKSK, including Sr36, SrTmp, and resistance conferred by the 1AL.1RS rye translocation. Race TRTTF is the first known race with virulence to the stem rust resistance carried by the 1AL.1RS translocation, which represents one of the few effective genes against TTKSK in winter wheat cultivars in the United States. Durum entries exhibiting resistant to moderately susceptible infection response at the Debre Zeit nursery in 2009 were evaluated for reaction to races JRCQC, TRTTF, and TTKSK at the seedling stage. In all, 47 entries were resistant to the three races evaluated at the seedling stage, whereas 26 entries exhibited a susceptible reaction. These results suggest the presence of both major and adult plant resistance genes, which would be useful in durum-wheat-breeding programs. A thorough survey of virulence in the population of P. graminis f. sp. tritici in Ethiopia will allow characterization of the geographic distribution of the races identified in the Debre Zeit field nursery.
publishDate 2012
dc.date.none.fl_str_mv 2012
2013-06-07T21:12:59Z
2013-06-07T21:12:59Z
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0191-2917
http://hdl.handle.net/10883/2956
10.1094/PDIS-09-11-0793
identifier_str_mv 0191-2917
10.1094/PDIS-09-11-0793
url http://hdl.handle.net/10883/2956
dc.language.none.fl_str_mv English
language_invalid_str_mv English
dc.rights.none.fl_str_mv Open Access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Open Access
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv PDF
application/pdf
dc.coverage.none.fl_str_mv Ethiopia
dc.publisher.none.fl_str_mv American Phytopathological Society (APS)
http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-09-11-0793
publisher.none.fl_str_mv American Phytopathological Society (APS)
http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-09-11-0793
dc.source.none.fl_str_mv 5
96
Plant Disease
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