Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes

ABSTRACT The adult plant resistance conferred by genes with an additive effect is an alternative to achieve durable resistance to leaf rust caused by the fungus Puccinia triticina in wheat (Triticum spp.) The objective of this study was to know the response to this disease in bread wheat genotypes t...

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Autores principales:	Ledesma-Ramírez,Lourdes, Solis-Moya,Ernesto, Ramírez-Pimentel,Juan G., Dreisigacker,Susanne, Huerta-Espino,Julio, Aguirre-Mancilla,Cesar L., Mariscal-Amaro,Luis A.
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2018
Materias:	Adult plant resistance phenotype severity slow-rusting Triticum aestivum
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000300400
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spelling	oai:scielo:S0718-583920180003004002018-11-14Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypesLedesma-Ramírez,LourdesSolis-Moya,ErnestoRamírez-Pimentel,Juan G.Dreisigacker,SusanneHuerta-Espino,JulioAguirre-Mancilla,Cesar L.Mariscal-Amaro,Luis A. Adult plant resistance phenotype severity slow-rusting Triticum aestivum ABSTRACT The adult plant resistance conferred by genes with an additive effect is an alternative to achieve durable resistance to leaf rust caused by the fungus Puccinia triticina in wheat (Triticum spp.) The objective of this study was to know the response to this disease in bread wheat genotypes that possess the partial resistance genes Lr34, Lr46, Lr67 and Lr68. The severity level of the disease was measured in 280 wheat genotypes in three locations. The presence or absence of partial resistance genes was determined by molecular markers for each gene in 245 wheat genotypes. The different combinations of adult plant genes resulted in the genotypes were classified into nine groups. In 77 of these genotypes, the markers were negative for these genes. The Lr34, Lr46, Lr67 and Lr68 genes were identified individually in 48, 48, 5, and 14 genotypes, respectively. The combination of two genes, Lr34+Lr46, Lr34+Lr68 and Lr46+Lr68, was determined in 18, 17, and 12 genotypes, respectively. Only in six genotypes the combination Lr34+Lr46+Lr68 was identified. The genotypes with the Lr34, Lr46, Lr67 and Lr68 genes in a unique form showed 21%, 24.8%, 21.9% and 21.8% of rust severity on average, respectively. An additive effect was observed in the combinations of two genes, and higher effect in the combinations that included the Lr34 gene since genotypes with this gene combination showed on average 11.4% of rust severity. The combination of three genes Lr34+Lr46+Lr68 provide greater protection in the genotypes with 9.7% of rust severity on average.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.78 n.3 20182018-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000300400en10.4067/S0718-58392018000300400
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Adult plant resistance phenotype severity slow-rusting Triticum aestivum
spellingShingle	Adult plant resistance phenotype severity slow-rusting Triticum aestivum Ledesma-Ramírez,Lourdes Solis-Moya,Ernesto Ramírez-Pimentel,Juan G. Dreisigacker,Susanne Huerta-Espino,Julio Aguirre-Mancilla,Cesar L. Mariscal-Amaro,Luis A. Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
description	ABSTRACT The adult plant resistance conferred by genes with an additive effect is an alternative to achieve durable resistance to leaf rust caused by the fungus Puccinia triticina in wheat (Triticum spp.) The objective of this study was to know the response to this disease in bread wheat genotypes that possess the partial resistance genes Lr34, Lr46, Lr67 and Lr68. The severity level of the disease was measured in 280 wheat genotypes in three locations. The presence or absence of partial resistance genes was determined by molecular markers for each gene in 245 wheat genotypes. The different combinations of adult plant genes resulted in the genotypes were classified into nine groups. In 77 of these genotypes, the markers were negative for these genes. The Lr34, Lr46, Lr67 and Lr68 genes were identified individually in 48, 48, 5, and 14 genotypes, respectively. The combination of two genes, Lr34+Lr46, Lr34+Lr68 and Lr46+Lr68, was determined in 18, 17, and 12 genotypes, respectively. Only in six genotypes the combination Lr34+Lr46+Lr68 was identified. The genotypes with the Lr34, Lr46, Lr67 and Lr68 genes in a unique form showed 21%, 24.8%, 21.9% and 21.8% of rust severity on average, respectively. An additive effect was observed in the combinations of two genes, and higher effect in the combinations that included the Lr34 gene since genotypes with this gene combination showed on average 11.4% of rust severity. The combination of three genes Lr34+Lr46+Lr68 provide greater protection in the genotypes with 9.7% of rust severity on average.
author	Ledesma-Ramírez,Lourdes Solis-Moya,Ernesto Ramírez-Pimentel,Juan G. Dreisigacker,Susanne Huerta-Espino,Julio Aguirre-Mancilla,Cesar L. Mariscal-Amaro,Luis A.
author_facet	Ledesma-Ramírez,Lourdes Solis-Moya,Ernesto Ramírez-Pimentel,Juan G. Dreisigacker,Susanne Huerta-Espino,Julio Aguirre-Mancilla,Cesar L. Mariscal-Amaro,Luis A.
author_sort	Ledesma-Ramírez,Lourdes
title	Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
title_short	Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
title_full	Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
title_fullStr	Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
title_full_unstemmed	Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
title_sort	relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000300400
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Relationship between the number of partial resistance genes and the response to leaf rust in wheat genotypes

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