ADULT-PLANT LEAF RUST RESISTANCE IN PI 250413, AN INTRODUCTION OF COMMON WHEAT

1979 ◽  
Vol 59 (2) ◽  
pp. 329-332 ◽  
Author(s):  
P. L. DYCK ◽  
D. J. SAMBORSKI
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Recessive Gene ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Adult Plant ◽  
Single Recessive Gene ◽  
Plant Leaf

The genetics of adult-plant resistance to leaf rust (Puccinia recondita Rob. ex. Desm.) was studied in a common wheat (Triticum aestivum L.) introduction PI 250413, originally collected in Pakistan. The resistance, although variable in expression, was conditioned bx a single recessive gene not previously identified, which was inherited independently of Lr12, Lr13 and Lr22, three previously identified genes for adult-plant leaf rust resistance. The gene present in PI 250413 was also found in five introductions from Iraq.

IDENTIFICATION OF THE GENE FOR ADULT-PLANT LEAF RUST RESISTANCE IN THATCHER

1979 ◽  
Vol 59 (2) ◽  
pp. 499-501 ◽  
Author(s):  
P. L. DYCK
Keyword(s):  
Leaf Rust ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Wheat Cultivar ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Adult Plant ◽  
Plant Leaf ◽  
Aegilops Squarrosa ◽  
The Common

The gene for adult-plant resistance to race 9 of leaf rust (Puccinia recondita Rob. ex. Desm.) in the common wheat cultivar Thatcher (Triticum aestivum L.) was allelic to Lr22a, a gene for adult-plant leaf rust resistance previously transferred to hexaploid wheat from Aegilops squarrosa L. This gene, designated Lr22b, was linked with Tg, a gene for tenacious glumes, and W21, an inhibitor of waxy foliage, both known to be on chromosome arm 2Dα and linked with Lr22a.

Adult-plant leaf rust resistance in Thatcher and Marquis wheat: a genetic analysis of the host–parasite interaction

1969 ◽  
Vol 47 (2) ◽  
pp. 267-269 ◽  
Author(s):  
P. Bartos ◽  
P. L. Dyck ◽  
D. J. Samborski
Keyword(s):  
Leaf Rust ◽  
Adult Plant Resistance ◽  
Recessive Gene ◽  
Leaf Rust Resistance ◽  
Adult Plant ◽  
Single Recessive Gene ◽  
Wheat Varieties ◽  
Host Parasite ◽  
Host Genes ◽  
Adult Plants

Inheritance of adult-plant resistance to race 9 of leaf rust was investigated in the wheat varieties Thatcher and Marquis. Resistance was conferred by the same recessive gene in both varieties. The genetics of virulence on adult plants of Thatcher was studied in a F2 population of cultures from a cross between races 9 and 161. A single recessive gene conferred virulence on adult plants of Thatcher. This gene was inherited independently of the genes that condition virulence on host genes Lr1, Lr2, Lr3, and Lr11.

Genetic mapping of adult plant leaf rust resistance genes Lr48 and Lr49 in common wheat

2008 ◽  
Vol 117 (3) ◽  
pp. 307-312 ◽  
Author(s):  
U. K. Bansal ◽  
M. J. Hayden ◽  
B. P. Venkata ◽  
R. Khanna ◽  
R. G. Saini ◽  
...  
Keyword(s):  
Genetic Mapping ◽  
Leaf Rust ◽  
Common Wheat ◽  
Resistance Genes ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Adult Plant ◽  
Plant Leaf ◽  
Rust Resistance Genes ◽  
Leaf Rust Resistance Genes

CHROMOSOME LOCATION OF THREE GENES FOR LEAF RUST RESISTANCE IN COMMON WHEAT

1971 ◽  
Vol 13 (3) ◽  
pp. 480-483 ◽  
Author(s):  
P. L. Dyck ◽  
E. R. Kerber
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Plant Resistance ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Leaf Rust Resistance ◽  
Adult Plant ◽  
Monosomic Analysis ◽  
Chromosome Location ◽  
Seedling Resistance

Genes Lr10 and Lr16 for seedling resistance and gene Lr12 for adult-plant resistance to leaf rust in common wheat were located on specific chromosomes by monosomic analysis using the Rescue monosomic series. Gene Lr10 is on chromosome 1A and genes Lr12 and Lr16 are on chromosome 4A. The latter two genes must be more than 50 crossover units apart since they segregated independently. These three genes were backcrossed into Thatcher from the variety Exchange. The variety Chinese Spring probably carries gene Lr12.

scholarly journals Inheritance of Adult Plant Leaf Rust Resistance in the Brazilian Wheat Cultivar Toropi

Plant Disease ◽  
2000 ◽  
Vol 84 (1) ◽  
pp. 90-93 ◽  
Author(s):  
A. L. Barcellos ◽  
A. P. Roelfs ◽  
M. I. B. de Moraes-Fernandes
Keyword(s):  
Leaf Rust ◽  
Plant Resistance ◽  
Rust Resistance ◽  
Adult Plant Resistance ◽  
Wheat Cultivar ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Leaf Rust Resistance ◽  
Adult Plant ◽  
Recessive Genes

Adult plant resistance to leaf rust in the Brazilian wheat cultivar Toropi (Triticum aestivum) was studied in crosses with the susceptible cultivar IAC 13. Cvs. Toropi and IAC 13 are susceptible at the seedling stage to race LCG-RS of Puccinia triticina Erikss., and to all other known Brazilian leaf-rust races. Thus, the resistance observed in Toropi in the field was due to adult plant-resistance genes. In the greenhouse at the adult plant stage, resistance segregated in a 7:9 ratio for two complementary recessive genes. Additionally, two recessive genes for leaf-tip necrosis were identified in the greenhouse environment. Necrosis was expressed when the two homozygous recessive genes occurred together in the F2, independently of the response to leaf rust. The resistance and leaf-necrosis genes differ from those previously reported in wheat. Segregation for leaf-rust resistance in the field at Passo Fundo, Brazil, fit a 1:3 ratio for a single recessive gene. With a different pathogen race, and in crosses of cvs. Toropi and ThatcherLr34, two recessive genes and a dominant gene for resistance were detected in the field in Mexico. The dominant gene was likely Lr34 from cv. ThatcherLr34 and the two recessive genes were likely those detected in the greenhouse adult plants tests at Passo Fundo.

The association of a gene for leaf rust resistance with the chromosome 7D suppressor of stem rust resistance in common wheat

Genome ◽  
1987 ◽  
Vol 29 (3) ◽  
pp. 467-469 ◽  
Author(s):  
P. L. Dyck
Keyword(s):  
Leaf Rust ◽  
Common Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Leaf Rust Resistance ◽  
Triticum Aestivum L ◽  
Suppressor Gene ◽  
Stem Rust Resistance ◽  
Recurrent Parent ◽  
Cytogenetic Evidence

Backcross lines of gene LrT2 for resistance to leaf rust in the common wheat (Triticum aestivum L.) 'Thatcher' unexpectedly show improved resistance to stem rust compared with that of the recurrent parent. Genetic–cytogenetic evidence indicates that LrT2 is on chromosome 7D, which is known to carry the "suppressor" gene(s) that prevent the expression of stem rust resistance conferred by other genes in 'Canthatch'. Thus, LrT2 may be a nonsuppressing allele of the suppressor gene(s) or be closely linked to such an allele. LrT2 has been designated Lr34. Key words: Triticum, wheat, rust resistance.

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