Leaf rust resistance in selected late maturity, common wheat cultivars from Uruguay

Silvia E. Germán; James A. Kolmer

doi:10.1007/s10681-013-0974-3

Leaf rust resistance in selected late maturity, common wheat cultivars from Uruguay

Silvia E. Germán, James A. Kolmer

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Leaf rust (caused by Puccinia triticina) is one of the most important diseases of wheat in Uruguay, and breeding for resistance to this disease is a priority for the INIA wheat program. Knowledge of the effective resistance genes present in the germplasm is relevant when selecting for effective and more durable resistance. The leaf rust resistance present in six adapted wheat cultivars that are parents of many advanced lines was studied. Races of P. triticina with different virulence combinations were used to determine which seedling resistance genes might be present in the six cultivars and/or derived lines. Genetic analysis of seedling and adult plant resistance (APR) was conducted on BC₁F₂ and F₃ generations from crosses of four cultivars with the susceptible cultivar Thatcher. The presence of APR genes Lr13 and Lr34 was confirmed with crosses of the four cultivars and Thatcher lines with these genes. A genetic marker associated with Lr34 was used to postulate the presence of this gene in all cultivars. The cultivars and resistance genes postulated to be present were: Estanzuela Calandria Lr3bg, Lr16 and Lr24; Estanzuela Federal Lr10; Estanzuela Halcón Lr10, Lr14a, and Lr16; INIA Tijereta and INIA Garza Lr16, Lr24 and Lr34; and INIA Torcaza Lr10 and Lr24. Only Lr16 and Lr34 remain effective to the predominant pathotypes. Additional ineffective seedling resistance that could not be identified was present in E. Federal, I. Tijereta and I. Torcaza. Unknown APR gene(s) could be present in E. Calandria and E. Federal.

Original language	English (US)
Pages (from-to)	57-67
Number of pages	11
Journal	Euphytica
Volume	195
Issue number	1
DOIs	https://doi.org/10.1007/s10681-013-0974-3
State	Published - Jan 2014
Externally published	Yes

Bibliographical note

Funding Information:
Acknowledgments Research support was provided by the Cereal Research Centre, Agriculture and Agri-Food Canada (Winnipeg MB) and by the U.S. Department of Agriculture, Agricultural Research Service, Cereal Disease Laboratory (St. Paul, MN). The research was supported with funding from the Canadian International Development Agency (Wheat Pathology and Tillage CIDA/INIA Project 964/1463). We thank Richard García and Elena Caballero for technical assistance.

Keywords

Gene postulation
Genetics of resistance
Puccinia triticina
Triticum aestivum

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10681-013-0974-3

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title = "Leaf rust resistance in selected late maturity, common wheat cultivars from Uruguay",

abstract = "Leaf rust (caused by Puccinia triticina) is one of the most important diseases of wheat in Uruguay, and breeding for resistance to this disease is a priority for the INIA wheat program. Knowledge of the effective resistance genes present in the germplasm is relevant when selecting for effective and more durable resistance. The leaf rust resistance present in six adapted wheat cultivars that are parents of many advanced lines was studied. Races of P. triticina with different virulence combinations were used to determine which seedling resistance genes might be present in the six cultivars and/or derived lines. Genetic analysis of seedling and adult plant resistance (APR) was conducted on BC1F2 and F3 generations from crosses of four cultivars with the susceptible cultivar Thatcher. The presence of APR genes Lr13 and Lr34 was confirmed with crosses of the four cultivars and Thatcher lines with these genes. A genetic marker associated with Lr34 was used to postulate the presence of this gene in all cultivars. The cultivars and resistance genes postulated to be present were: Estanzuela Calandria Lr3bg, Lr16 and Lr24; Estanzuela Federal Lr10; Estanzuela Halc{\'o}n Lr10, Lr14a, and Lr16; INIA Tijereta and INIA Garza Lr16, Lr24 and Lr34; and INIA Torcaza Lr10 and Lr24. Only Lr16 and Lr34 remain effective to the predominant pathotypes. Additional ineffective seedling resistance that could not be identified was present in E. Federal, I. Tijereta and I. Torcaza. Unknown APR gene(s) could be present in E. Calandria and E. Federal.",

keywords = "Gene postulation, Genetics of resistance, Puccinia triticina, Triticum aestivum",

author = "Germ{\'a}n, {Silvia E.} and Kolmer, {James A.}",

note = "Funding Information: Acknowledgments Research support was provided by the Cereal Research Centre, Agriculture and Agri-Food Canada (Winnipeg MB) and by the U.S. Department of Agriculture, Agricultural Research Service, Cereal Disease Laboratory (St. Paul, MN). The research was supported with funding from the Canadian International Development Agency (Wheat Pathology and Tillage CIDA/INIA Project 964/1463). We thank Richard Garc{\'i}a and Elena Caballero for technical assistance.",

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AU - Germán, Silvia E.

AU - Kolmer, James A.

N1 - Funding Information: Acknowledgments Research support was provided by the Cereal Research Centre, Agriculture and Agri-Food Canada (Winnipeg MB) and by the U.S. Department of Agriculture, Agricultural Research Service, Cereal Disease Laboratory (St. Paul, MN). The research was supported with funding from the Canadian International Development Agency (Wheat Pathology and Tillage CIDA/INIA Project 964/1463). We thank Richard García and Elena Caballero for technical assistance.

PY - 2014/1

Y1 - 2014/1

N2 - Leaf rust (caused by Puccinia triticina) is one of the most important diseases of wheat in Uruguay, and breeding for resistance to this disease is a priority for the INIA wheat program. Knowledge of the effective resistance genes present in the germplasm is relevant when selecting for effective and more durable resistance. The leaf rust resistance present in six adapted wheat cultivars that are parents of many advanced lines was studied. Races of P. triticina with different virulence combinations were used to determine which seedling resistance genes might be present in the six cultivars and/or derived lines. Genetic analysis of seedling and adult plant resistance (APR) was conducted on BC1F2 and F3 generations from crosses of four cultivars with the susceptible cultivar Thatcher. The presence of APR genes Lr13 and Lr34 was confirmed with crosses of the four cultivars and Thatcher lines with these genes. A genetic marker associated with Lr34 was used to postulate the presence of this gene in all cultivars. The cultivars and resistance genes postulated to be present were: Estanzuela Calandria Lr3bg, Lr16 and Lr24; Estanzuela Federal Lr10; Estanzuela Halcón Lr10, Lr14a, and Lr16; INIA Tijereta and INIA Garza Lr16, Lr24 and Lr34; and INIA Torcaza Lr10 and Lr24. Only Lr16 and Lr34 remain effective to the predominant pathotypes. Additional ineffective seedling resistance that could not be identified was present in E. Federal, I. Tijereta and I. Torcaza. Unknown APR gene(s) could be present in E. Calandria and E. Federal.

AB - Leaf rust (caused by Puccinia triticina) is one of the most important diseases of wheat in Uruguay, and breeding for resistance to this disease is a priority for the INIA wheat program. Knowledge of the effective resistance genes present in the germplasm is relevant when selecting for effective and more durable resistance. The leaf rust resistance present in six adapted wheat cultivars that are parents of many advanced lines was studied. Races of P. triticina with different virulence combinations were used to determine which seedling resistance genes might be present in the six cultivars and/or derived lines. Genetic analysis of seedling and adult plant resistance (APR) was conducted on BC1F2 and F3 generations from crosses of four cultivars with the susceptible cultivar Thatcher. The presence of APR genes Lr13 and Lr34 was confirmed with crosses of the four cultivars and Thatcher lines with these genes. A genetic marker associated with Lr34 was used to postulate the presence of this gene in all cultivars. The cultivars and resistance genes postulated to be present were: Estanzuela Calandria Lr3bg, Lr16 and Lr24; Estanzuela Federal Lr10; Estanzuela Halcón Lr10, Lr14a, and Lr16; INIA Tijereta and INIA Garza Lr16, Lr24 and Lr34; and INIA Torcaza Lr10 and Lr24. Only Lr16 and Lr34 remain effective to the predominant pathotypes. Additional ineffective seedling resistance that could not be identified was present in E. Federal, I. Tijereta and I. Torcaza. Unknown APR gene(s) could be present in E. Calandria and E. Federal.

KW - Gene postulation

KW - Genetics of resistance

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KW - Triticum aestivum

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Leaf rust resistance in selected late maturity, common wheat cultivars from Uruguay

Abstract

Bibliographical note

Keywords

UN SDGs

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