Vista Equipo: Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador

Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador

Virulence factors of the yellow rust, Puccinia striiformis, populations in bread wheat were studied in Ecuador between 1973 and 2004. The number of virulence factors has increased markedly from very few in the early seventies to 16 at the end of the 90s. Isolates belonging to race 0E0 seem to be the...

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Autores Principales:	Ochoa L., José, Danial, Daniel L., Paucar, Betty
Formato:	Artículos
Lenguaje:	en
Publicado:	2017
Materias:	TRIGO TRITICUM ROYA AMARILLA PUCCINIA STRIIFORMIS HONGOS RESISTENCIA CUANTITATIVA RESISTENCIA DE PLÁNTULA
Acceso en línea:	http://repositorio.iniap.gob.ec/handle/41000/4378
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spelling	ir-:41000-43782018-03-27T18:49:31Z Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador Euphytica 153:287-293 Ochoa L., José Danial, Daniel L. Paucar, Betty TRIGO TRITICUM ROYA AMARILLA PUCCINIA STRIIFORMIS HONGOS RESISTENCIA CUANTITATIVA RESISTENCIA DE PLÁNTULA Virulence factors of the yellow rust, Puccinia striiformis, populations in bread wheat were studied in Ecuador between 1973 and 2004. The number of virulence factors has increased markedly from very few in the early seventies to 16 at the end of the 90s. Isolates belonging to race 0E0 seem to be the ancestor of a rapid virulence evolution of yellow rust in Ecuador. This evolution can be explained by a single step mutation pattern. Virulence to the resistance genes Yr1, Yr2, Yr2+, Yr3V, Yr3ND, Yr4+, Yr6, Yr6+, Yr7, Yr7+, Yr9, Yr9+, Yr11, Yr12, Yr18, Yr24, Yr26 and those in the cultivars Carstens V (YrCV) Strubes Dickkopf (YrSD), Suwon92/Omar (YrSU), Spaldings Proliﬁc (YrSP), Anza (YrA+) and Selkirk (YrSK). was identiﬁed. Virulence to Yr5, Yr8, Yr10, and Yr15 was not found. Postulation of resistance genes at the seedling stage of 14 Ecuadorian wheat cultivars indicated that these cultivars carry alone or in combinations the resistance factors Yr1, Yr2, Yr3, Yr6, Yr9 and/or other undesignated resistance factors. Yellow rust evolution in Ecuador has been associated with deployment of these resistance genes. None of these deployed Yr resistance genes are effective to the present yellow rust population in Ecuador. 2017-06-14T14:05:37Z 2017-06-14T14:05:37Z 2007-02 Revista Artículo *EC-INIAP-BEESC-MGC. Quito (INIAP/CD144) http://repositorio.iniap.gob.ec/handle/41000/4378 en p. 287-293 application/pdf E. E. Santa Catalina
institution	INIAP
collection	Repositorio INIAP
biblioteca	Biblioteca INIAP
language	en
format	Artículos
topic	TRIGO TRITICUM ROYA AMARILLA PUCCINIA STRIIFORMIS HONGOS RESISTENCIA CUANTITATIVA RESISTENCIA DE PLÁNTULA
spellingShingle	TRIGO TRITICUM ROYA AMARILLA PUCCINIA STRIIFORMIS HONGOS RESISTENCIA CUANTITATIVA RESISTENCIA DE PLÁNTULA Ochoa L., José Danial, Daniel L. Paucar, Betty Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador
description	Virulence factors of the yellow rust, Puccinia striiformis, populations in bread wheat were studied in Ecuador between 1973 and 2004. The number of virulence factors has increased markedly from very few in the early seventies to 16 at the end of the 90s. Isolates belonging to race 0E0 seem to be the ancestor of a rapid virulence evolution of yellow rust in Ecuador. This evolution can be explained by a single step mutation pattern. Virulence to the resistance genes Yr1, Yr2, Yr2+, Yr3V, Yr3ND, Yr4+, Yr6, Yr6+, Yr7, Yr7+, Yr9, Yr9+, Yr11, Yr12, Yr18, Yr24, Yr26 and those in the cultivars Carstens V (YrCV) Strubes Dickkopf (YrSD), Suwon92/Omar (YrSU), Spaldings Proliﬁc (YrSP), Anza (YrA+) and Selkirk (YrSK). was identiﬁed. Virulence to Yr5, Yr8, Yr10, and Yr15 was not found. Postulation of resistance genes at the seedling stage of 14 Ecuadorian wheat cultivars indicated that these cultivars carry alone or in combinations the resistance factors Yr1, Yr2, Yr3, Yr6, Yr9 and/or other undesignated resistance factors. Yellow rust evolution in Ecuador has been associated with deployment of these resistance genes. None of these deployed Yr resistance genes are effective to the present yellow rust population in Ecuador.
author	Ochoa L., José Danial, Daniel L. Paucar, Betty
author_facet	Ochoa L., José Danial, Daniel L. Paucar, Betty
author_sort	Ochoa L., José
title	Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador
title_short	Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador
title_full	Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador
title_fullStr	Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador
title_full_unstemmed	Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador
title_sort	virulence of wheat yellow rust races and resistance genes of wheat cultivars in ecuador
publishDate	2017
url	http://repositorio.iniap.gob.ec/handle/41000/4378
_version_	1635512262005358592
score	11,871979

Virulence of wheat yellow rust races and resistance genes of wheat cultivars in Ecuador

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