INHERITANCE OF RESISTANCE TO STEM RUST RACES 15B AND 56 IN EIGHT CULTIVARS OF COMMON WHEAT

1977 ◽  
Vol 57 (3) ◽  
pp. 633-641 ◽  
Author(s):  
D. R. KNOTT ◽  
J. P. SRIVASTAVA
Keyword(s):  
Common Wheat ◽  
Spring Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Stem Rust Resistance ◽  
Inheritance Of Resistance ◽  
Major Genes ◽  
Moderate Resistance ◽  
Wheat Rust

Eight cultivars of common wheat showing good stem rust resistance in International Spring Wheat Rust Nurseries were selected. They were backcrossed to the susceptible cultivars Marquis and Little Club and the inheritance of their resistance to races 15B and 56 was studied. The major genes carried by the cultivars had all been identified previously. The cultivars and the major genes carried by them were as follows: Andes Sib (Sr8, Sr9?), Colotana (Sr8), Giza-Hegazy (Sr7a, Sr9a or b) Huascav (Sr9d), S.A. 112/52 (Sr9d), Bonza Selection (Sr6), Kuntur (Sr6, Sr7a) and Maribal Marina (Sr7a). In addition, four of the cultivars carried one or more genes giving very moderate resistance to one or both of the races.

THE INHERITANCE OF RUST RESISTANCE. III. THE INHERITANCE OF STEM RUST RESISTANCE IN NINE KENYA VARIETIES OF COMMON WHEAT

1957 ◽  
Vol 37 (4) ◽  
pp. 366-384 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Genetic Analysis ◽  
Common Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Hypersensitive Reaction ◽  
Stem Rust Resistance ◽  
Inheritance Of Resistance ◽  
Susceptible Parent ◽  
Inheritance Of Rust Resistance ◽  
Moderate Resistance

The inheritance of resistance to races 15B and 56 of stem rust was studied in the varieties Kenya 58, Kenya 117A, Kenya C9906, Kenya 338.AC.2.E.2, Kenya Governor, Kenya B286, Kenya 291.J.1.I.1, Kenya 321.BT.1.B.1 and Kenya 350.AD.9.C.2. The first five varieties had been studied previously and crosses involving them were not repeated. The genetic analysis of the varieties was based on diallel crosses and backcrosses to a susceptible parent, Marquis.All nine varieties proved to carry Sr7, a gene which conditions resistance to race 15B. Four varieties, Kenya 58, Kenya C9906, Kenya 291 and Kenya 350, carry the gene Sr6, which conditions a hypersensitive reaction to both race 15B and race 56. In addition, four of the varieties carry Sr9 and five carry Sr10, two genes which produce moderate resistance to race 56. Kenya 338.AC.2.E.2 carries two additional dominant, complementary genes, Sr11 and Sr12, which condition resistance to race 56.The genes, Sr9, Sr10, Sr11 and Sr12 are important modifiers of the resistance to race 15B conditioned by Sr7, with Sr9 probably having the greatest effect.

THE INHERITANCE OF RUST RESISTANCE. II. THE INHERITANCE OF STEM RUST RESISTANCE IN SIX ADDITIONAL VARIETIES OF COMMON WHEAT

1957 ◽  
Vol 37 (3) ◽  
pp. 177-192 ◽  
Author(s):  
D. R. Knott
Keyword(s):  
Common Wheat ◽  
Plant Resistance ◽  
Stem Rust ◽  
Rust Resistance ◽  
Susceptible Variety ◽  
Stem Rust Resistance ◽  
Inheritance Of Resistance ◽  
Mature Plant Resistance ◽  
Inheritance Of Rust Resistance ◽  
Additive Genes

The inheritance of resistance to races 15B and 56 of stem rust was studied in the varieties Africa No. 43, Kenya C9906, Kenya 338.AC.2.E.2, Egypt Na101, Veadeiro and Red Egyptian type (P.I. 170910). Each variety was analysed genetically on the basis of data obtained from a backcross to the rust susceptible variety Marquis. The interrelationships of the genes in the varieties were determined from diallel crosses. With the exception of Veadeiro, the varieties all carried various combinations of genes reported in the first paper of this series. Veadeiro has a mature plant resistance to race 15B which is probably conditioned by two additive genes not previously noted.

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.

Association mapping and gene–gene interaction for stem rust resistance in CIMMYT spring wheat germplasm

2011 ◽  
Vol 123 (8) ◽  
pp. 1257-1268 ◽  
Author(s):  
Long-Xi Yu ◽  
Aaron Lorenz ◽  
Jessica Rutkoski ◽  
Ravi P. Singh ◽  
Sridhar Bhavani ◽  
...  
Keyword(s):  
Association Mapping ◽  
Spring Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Gene Interaction ◽  
Stem Rust Resistance ◽  
Wheat Germplasm

Genetic Characterization of Stem Rust Resistance in a Global Spring Wheat Germplasm Collection

Crop Science ◽  
2017 ◽  
Vol 57 (5) ◽  
pp. 2575-2589 ◽  
Author(s):  
Liangliang Gao ◽  
Matthew N. Rouse ◽  
Paul D. Mihalyov ◽  
Peter Bulli ◽  
Michael O. Pumphrey ◽  
...  
Keyword(s):  
Spring Wheat ◽  
Stem Rust ◽  
Rust Resistance ◽  
Genetic Characterization ◽  
Germplasm Collection ◽  
Stem Rust Resistance ◽  
Wheat Germplasm

GENETICS OF STEM RUST RESISTANCE IN WHEAT CULTIVARS ROMANY, Es.P 518/9, BONNY AND TAMA

1975 ◽  
Vol 17 (4) ◽  
pp. 667-674 ◽  
Author(s):  
P. L. Dyck ◽  
G. J. Green
Keyword(s):  
Triticum Aestivum ◽  
Stem Rust ◽  
Rust Resistance ◽  
Triticum Aestivum L ◽  
Stem Rust Resistance ◽  
Puccinia Graminis ◽  
Wheat Cultivars ◽  
Genetics Of Resistance ◽  
Seedling Resistance ◽  
Moderate Resistance

The genetics of resistance to stem rust (Puccinia graminis tritici) was investigated in wheat (Triticum aestivum L.) cultivars Romany, Es.P 518/9, Bonny and Tama that are resistant to many races in both Canada and Kenya. Seedling resistance in the four cultivars to 12 Canadian races is controlled primarily by previously identified genes. The results indicate that the cultivars have the following genes: Romany — Sr5, Sr6, Sr7a, Sr9b and SrW; Es.P 518/9 — Sr5, Sr6, Sr7a, Sr8, Sr9b, SrW and possibly Sr17; Bonny — Sr6 and Sr11; and Tama — Sr6 and Sr8. Gene SrW confers moderate resistance and is also present in the cultivar Webster.

THE INHERITANCE OF RUST RESISTANCE: VII. THE INHERITANCE OF RESISTANCE TO RACES 15B AND 56 OF STEM RUST IN ELEVEN COMMON WHEAT VARIETIES OF DIVERSE ORIGIN

1961 ◽  
Vol 41 (3) ◽  
pp. 587-601 ◽  
Author(s):  
D. R. Knott ◽  
I-Sun Shen
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Inheritance Of Resistance ◽  
Susceptible Parent ◽  
Wheat Varieties ◽  
New Genes ◽  
New Gene ◽  
Diverse Origin ◽  
Inheritance Of Rust Resistance ◽  
Moderate Resistance

In an attempt to locate new genes for stem rust resistance, 11 varieties of wheat of as diverse origins as possible were studied. Each variety was backcrossed to the susceptible parent Marquis. The F2 families from the backcrosses were tested with races 15B and 56, and the inheritance of resistance determined. The genes carried by each variety were identified from the results of test crosses with varieties carrying known genes and with lines of Marquis carrying single genes for resistance. Most of the resistance present in the 11 varieties could be accounted for on the basis of known genes (Sr6 – Sr10). However, at least one new gene conditioning moderate resistance to race 15B, and possibly one or more new genes conditioning moderate resistance to race 56, were identified.

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