Sources of stem rust resistance in wheat-alien introgression lines

Sources of stem rust resistance in wheat-alien introgression lines

Stem rust is one of the most devastating diseases of wheat. Widely virulent races of the pathogen in the Ug99 lineage (e.g., TTKSK) are threatening wheat production worldwide; therefore, there is an urgent need to enhance the diversity of resistance genes in the crop. The objectives of this study were to identify new sources of resistance in wheat-alien introgression derivatives from Secale cereale, Leymus mollis, L. racemosus, and Thinopyrum junceiforme, postulate genes conferring the resistance, and verify the postulated genes by use of molecular markers. From seedling tests conducted in the greenhouse, the presence of seven known stem rust resistance genes (Sr7b, Sr8a, Sr9d, Sr10, Sr31, Sr36, and SrSatu) was postulated in the wheat-alien introgression lines. More lines possessed a high level of resistance in the field compared with the number of lines that were resistant at the seedling stage. Three 2R (2D) wheat-rye substitution lines (SLU210, SLU238, and SLU239) seemed likely to possess new genes for resistance to stem rust based on their resistance pattern to 13 different stem rust races but the genes responsible could not be identified. Wheat-rye, wheat-L. racemosus, and wheat-L. mollis substitutions or translocations with single and multiple interchanges of chromosomes, in particular of the B and D chromosomes of wheat, were verified by a combination of genomic in situ hybridization and molecular markers. Thus, the present study identified novel resistance genes originating from different alien introgressions into the wheat genome of the evaluated lines. Such genes may prove useful in enhancing the diversity of stem rust resistance in wheat against widely virulent pathogen races such as those in the Ug99 lineage.

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Autores principales: Rahmatov, M., Rouse, M.N., Steffenson, B.J., Andersson, S.C., Wanyera, R., Pretorius, Z.A., Houben, A., Kumarse, N., Bhavani, S., Johansson, E.
Formato: Artículo biblioteca
Idioma:English
Publicado: American Phytopathological Society (APS) 2016
Materias:AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, Stem Rust, Pathogen, WHEAT, RUSTS, DISEASE RESISTANCE, GENETIC RESISTANCE, INTROGRESSION,
Acceso en línea:https://hdl.handle.net/10883/19712
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spelling dig-cimmyt-10883-197122023-11-29T15:35:58Z Sources of stem rust resistance in wheat-alien introgression lines Rahmatov, M. Rouse, M.N. Steffenson, B.J. Andersson, S.C. Wanyera, R. Pretorius, Z.A. Houben, A. Kumarse, N. Bhavani, S. Johansson, E. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Stem Rust Pathogen WHEAT RUSTS DISEASE RESISTANCE GENETIC RESISTANCE INTROGRESSION Stem rust is one of the most devastating diseases of wheat. Widely virulent races of the pathogen in the Ug99 lineage (e.g., TTKSK) are threatening wheat production worldwide; therefore, there is an urgent need to enhance the diversity of resistance genes in the crop. The objectives of this study were to identify new sources of resistance in wheat-alien introgression derivatives from Secale cereale, Leymus mollis, L. racemosus, and Thinopyrum junceiforme, postulate genes conferring the resistance, and verify the postulated genes by use of molecular markers. From seedling tests conducted in the greenhouse, the presence of seven known stem rust resistance genes (Sr7b, Sr8a, Sr9d, Sr10, Sr31, Sr36, and SrSatu) was postulated in the wheat-alien introgression lines. More lines possessed a high level of resistance in the field compared with the number of lines that were resistant at the seedling stage. Three 2R (2D) wheat-rye substitution lines (SLU210, SLU238, and SLU239) seemed likely to possess new genes for resistance to stem rust based on their resistance pattern to 13 different stem rust races but the genes responsible could not be identified. Wheat-rye, wheat-L. racemosus, and wheat-L. mollis substitutions or translocations with single and multiple interchanges of chromosomes, in particular of the B and D chromosomes of wheat, were verified by a combination of genomic in situ hybridization and molecular markers. Thus, the present study identified novel resistance genes originating from different alien introgressions into the wheat genome of the evaluated lines. Such genes may prove useful in enhancing the diversity of stem rust resistance in wheat against widely virulent pathogen races such as those in the Ug99 lineage. 1101-1109 2019-01-09T20:27:57Z 2019-01-09T20:27:57Z 2016 Article 0031-949X 1943-7684 https://hdl.handle.net/10883/19712 10.1094/PDIS-12-15-1448-RE English CIMMYT 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 Access PDF United States American Phytopathological Society (APS) 6 100 Plant Disease
institution CIMMYT
collection DSpace
country México
countrycode MX
component Bibliográfico
access En linea
databasecode dig-cimmyt
tag biblioteca
region America del Norte
libraryname CIMMYT Library
language English
topic AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Stem Rust
Pathogen
WHEAT
RUSTS
DISEASE RESISTANCE
GENETIC RESISTANCE
INTROGRESSION
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Stem Rust
Pathogen
WHEAT
RUSTS
DISEASE RESISTANCE
GENETIC RESISTANCE
INTROGRESSION
spellingShingle AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Stem Rust
Pathogen
WHEAT
RUSTS
DISEASE RESISTANCE
GENETIC RESISTANCE
INTROGRESSION
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Stem Rust
Pathogen
WHEAT
RUSTS
DISEASE RESISTANCE
GENETIC RESISTANCE
INTROGRESSION
Rahmatov, M.
Rouse, M.N.
Steffenson, B.J.
Andersson, S.C.
Wanyera, R.
Pretorius, Z.A.
Houben, A.
Kumarse, N.
Bhavani, S.
Johansson, E.
Sources of stem rust resistance in wheat-alien introgression lines
description Stem rust is one of the most devastating diseases of wheat. Widely virulent races of the pathogen in the Ug99 lineage (e.g., TTKSK) are threatening wheat production worldwide; therefore, there is an urgent need to enhance the diversity of resistance genes in the crop. The objectives of this study were to identify new sources of resistance in wheat-alien introgression derivatives from Secale cereale, Leymus mollis, L. racemosus, and Thinopyrum junceiforme, postulate genes conferring the resistance, and verify the postulated genes by use of molecular markers. From seedling tests conducted in the greenhouse, the presence of seven known stem rust resistance genes (Sr7b, Sr8a, Sr9d, Sr10, Sr31, Sr36, and SrSatu) was postulated in the wheat-alien introgression lines. More lines possessed a high level of resistance in the field compared with the number of lines that were resistant at the seedling stage. Three 2R (2D) wheat-rye substitution lines (SLU210, SLU238, and SLU239) seemed likely to possess new genes for resistance to stem rust based on their resistance pattern to 13 different stem rust races but the genes responsible could not be identified. Wheat-rye, wheat-L. racemosus, and wheat-L. mollis substitutions or translocations with single and multiple interchanges of chromosomes, in particular of the B and D chromosomes of wheat, were verified by a combination of genomic in situ hybridization and molecular markers. Thus, the present study identified novel resistance genes originating from different alien introgressions into the wheat genome of the evaluated lines. Such genes may prove useful in enhancing the diversity of stem rust resistance in wheat against widely virulent pathogen races such as those in the Ug99 lineage.
format Article
topic_facet AGRICULTURAL SCIENCES AND BIOTECHNOLOGY
Stem Rust
Pathogen
WHEAT
RUSTS
DISEASE RESISTANCE
GENETIC RESISTANCE
INTROGRESSION
author Rahmatov, M.
Rouse, M.N.
Steffenson, B.J.
Andersson, S.C.
Wanyera, R.
Pretorius, Z.A.
Houben, A.
Kumarse, N.
Bhavani, S.
Johansson, E.
author_facet Rahmatov, M.
Rouse, M.N.
Steffenson, B.J.
Andersson, S.C.
Wanyera, R.
Pretorius, Z.A.
Houben, A.
Kumarse, N.
Bhavani, S.
Johansson, E.
author_sort Rahmatov, M.
title Sources of stem rust resistance in wheat-alien introgression lines
title_short Sources of stem rust resistance in wheat-alien introgression lines
title_full Sources of stem rust resistance in wheat-alien introgression lines
title_fullStr Sources of stem rust resistance in wheat-alien introgression lines
title_full_unstemmed Sources of stem rust resistance in wheat-alien introgression lines
title_sort sources of stem rust resistance in wheat-alien introgression lines
publisher American Phytopathological Society (APS)
publishDate 2016
url https://hdl.handle.net/10883/19712
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