Probable Genotypes of Hard Red Spring Wheats for Resistance to Puccinia recondita f. sp. tritici1

Rizvi, Syed S.; Statler, G. D.

doi:10.2135/cropsci1982.0011183x002200060019x

Cited by 4 publications

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“…Waldron/Era/6/Fletcher Bajo-66//Era/3/*2 Era) may have derived Lr10, Lr13, and Lr34 from Era (6). Kitt or Crim may have been the source of Lr23 (16). The sources of Lr1 and Lr16 in Norm were not apparent from the pedigree; however, both genes are common in U.S. hard red spring wheats (14).…”

Section: Discussionmentioning

confidence: 97%

“…Alsen (ND 674//ND 2710/ND 688) (ND 674 = Grandin*2/ Glupro) (ND 2710 = Sumai 3/Wheaton/Grandin) most likely derived Lr2a, Lr10, Lr13, and Lr34 from Grandin (9). Wheaton (Crim/*2 Era//Buitre/Gallo) may have been the source of Lr23 in Alsen since Crim was postulated to have Lr23 (16). Norm (MN 73167/MN 81070) (MN 73167 = Crim/*2 Era//MN 6925s) (MN 81070 = Era/Kitt/3/Fletcher Ciano 67//ND 264/4/II-60-46/5/ to temperature sensitivity and a suppressor gene in Thatcher.…”

Section: Discussionmentioning

confidence: 99%

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Genetics of Leaf Rust Resistance in Spring Wheat Cultivars Alsen and Norm

Oelke

Kolmer²

2005

Phytopathology®

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Alsen is a recently released spring wheat cultivar that has been widely grown in the United States because it has resistance to Fusarium head blight and leaf rust caused by Puccinia triticina. Norm is a high yielding wheat cultivar that has been very resistant to leaf rust since it was released. Alsen and Norm were genetically examined to determine the number and identity of the leaf rust resistance genes present in both wheats. The two cultivars were crossed with leaf rust susceptible cv. Thatcher and F(1) plants were backcrossed to Thatcher. Eighty one and seventy three BCF(1) of Thatcher times; Alsen and Thatcher x Norm respectively, were selfed to obtain BCF(2) families. The BCF(2) families were tested as seedlings with different isolates of P. triticina that differed for virulence to specific leaf rust resistance genes. The BCF(2) families that lacked seedling resistance were also tested as adult plants in greenhouse tests and in a field rust nursery plot. Segregation of BCF(2) families indicated that Alsen had seedling genes Lr2a, Lr10, and Lr23 and adult plant genes Lr13 and Lr34. Norm was determined to have seedling genes Lr1, Lr10, Lr16, and Lr23 and adult plant genes Lr13 and Lr34. The characterization of Lr23 in the segregating populations was complicated by the presence of a suppressor gene in Thatcher and the high temperature sensitivity of resistance expression for this gene. The effective leaf rust resistance in Alsen is due to the interaction of Lr13 and Lr23, with Lr34; and the effective leaf rust resistance in Norm is due to the interaction of Lr13, Lr16, and Lr23, with Lr34.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Genetics of Leaf Rust Resistance in Spring Wheat Cultivars Alsen and Norm

Oelke

Kolmer²

2005

Phytopathology®

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Occurrence and virulence ofPuccinia reconditain Canada in 1985

Samborski¹

1986

Canadian Journal of Plant Pathology

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Characterization of Leaf Rust Resistance in Hard Red Spring Wheat Cultivars

Oelke

Kolmer

2004

Plant Disease

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Leaf rust, caused by Puccinia triticina Eriks., is the most common disease of wheat (Triticum aestivum L.) in the United States and worldwide. The objective of this study was to characterize seedling and adult plant leaf rust resistance in hard red spring wheat cultivars grown in Minnesota, North Dakota, and South Dakota, and postulate the identity of the seedling leaf rust resistance genes in the cultivars. Twenty-six cultivars, near-isogenic lines of Thatcher wheat that differ for single leaf rust resistance genes, and three wheat cultivars with known leaf rust resistance genes, were tested with 11 different isolates of leaf rust collected from the United States and Canada. The leaf rust infection types produced on seedling plants of the cultivars in greenhouse tests were compared with the infection types produced by the same isolates on the Thatcher near-isogenic lines to postulate which seedling leaf rust resistance genes were present. Seedling leaf rust resistance genes Lr1, Lr2a, Lr10, Lr16, Lr21, and Lr24 were postulated to be present in spring wheat cultivars. Seedling genes Lr3, Lr14a, and Lr23 likely were present in some cultivars but could not be clearly identified in this study. Most of the cultivars had some level of adult plant leaf rust resistance, most likely due to Lr34. Cultivars that had seedling resistance genes Lr1, Lr2a, Lr10, or Lr16 had poor to intermediate levels of leaf rust resistance in field plots. Cultivars with combinations of seedling resistance genes Lr16 and Lr24 with additional adult plant resistance were highly resistant to leaf rust.

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Probable Genotypes of Hard Red Spring Wheats for Resistance to Puccinia recondita f. sp. tritici¹

Cited by 4 publications

References 0 publications

Genetics of Leaf Rust Resistance in Spring Wheat Cultivars Alsen and Norm

Genetics of Leaf Rust Resistance in Spring Wheat Cultivars Alsen and Norm

Occurrence and virulence ofPuccinia reconditain Canada in 1985

Characterization of Leaf Rust Resistance in Hard Red Spring Wheat Cultivars

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