Inheritance of resistance to two races of crown rust in oats

1953 ◽  
Author(s):  
Ralph E. Finkner
Keyword(s):  
Crown Rust ◽  
Inheritance Of Resistance

INHERITANCE OF CROWN RUST RESISTANCE IN THREE ACCESSIONS OF AVENA STERILIS

1980 ◽  
Vol 22 (1) ◽  
pp. 27-33 ◽  
Author(s):  
D. E. Harder ◽  
R. I. H. McKenzie ◽  
J. W. Martens
Keyword(s):  
Rust Resistance ◽  
Dominant Gene ◽  
Crown Rust ◽  
Inheritance Of Resistance ◽  
Single Dominant Gene ◽  
Avena Sterilis ◽  
Oat Crown Rust ◽  
Crown Rust Resistance ◽  
Resistance Spectrum ◽  
Dominant Genes

The inheritance of resistance to oat crown rust was studied in three accessions of Avena sterilis L. Accession CAV 4274 originated from Morocco, CAV 4540 from Algeria, and CAV 3695 from Tunisia. Seedling rust tests on F2 backcross families indicated the presence of two dominant genes for crown rust resistance in CAV 4274. One of these, a gene conditioning resistance to most races tested, was linked or allelic to gene Pc-38, and was designated gene Pc-62. The second gene conferred resistance only to one of the six races studied, and was not tested further. In CAV 4540, a single dominant gene, Pc-63 was possibly allelic with Pc-62 and linked or allelic to Pc-38. Genes Pc-62 and 63 are generally similar to Pc-38 in their resistance spectrum, but these three genes are differentiated by races CR 102, CR 103, and CR 107. A single dominant gene in CAV 3695 appeared to be Pc-50.

The inheritance of resistance to Puccinia coronata and of floret characters in Avena sterilis

1983 ◽  
Vol 25 (4) ◽  
pp. 329-335 ◽  
Author(s):  
L. S. L. Wong ◽  
R. I. H. McKenzie ◽  
D. E. Harder ◽  
J. W. Martens
Keyword(s):  
Rust Resistance ◽  
Dominant Gene ◽  
Crown Rust ◽  
Puccinia Coronata ◽  
Inheritance Of Resistance ◽  
Avena Sterilis ◽  
Field Isolates ◽  
Crown Rust Resistance ◽  
Dominant Genes

The inheritance of resistance to Puccinia coronata, awn development, lemma pubescence, and lemma color were studied in the Avena sterilis accessions CAV 4248, CAV 4656, and CAV 4904. Three independent, partially dominant genes (Pc-64, Pc-65, Pc-66) in CAV 4248, one partially dominant gene (Pc-67) in CAV 4656, and a dominant gene (Pc-68) in CAV 4904 were identified which conferred resistance to P. coronata. Genes Pc-64, Pc-65, Pc-66, Pc-67, and Pc-68 conferred resistance to 13, 8, 6, 12, and 14 races, respectively, of the 14 races of P. coronata tested. Gene Pc-68 conferred resistance to all field isolates of P. coronata collected in Canada in 1981 and was found to be closely linked or allelic to gene Pc-46. Awns and lemma pubescence were inherited monogenically in crosses with all three CAV accessions. Grey lemma color was controlled by one gene in CAV 4248 and by two genes in CAV 4656. Brown lemma color was controlled by one gene, which was closely linked or pleiotropic with the gene for lemma pubescence in CAV 4904. There was no association between crown rust resistance and the three floret characters studied.

INHERITANCE OF RESISTANCE TO PUCCINIA CORONATA AVENAE AND ITS ASSOCIATION WITH SEED CHARACTERISTICS IN FOUR ACCESSIONS OF AVENA STERILIS

1976 ◽  
Vol 18 (4) ◽  
pp. 717-726 ◽  
Author(s):  
F. A. Kiehn ◽  
R. I. H. McKenzie ◽  
D. E. Harder
Keyword(s):  
Dominant Gene ◽  
Recessive Gene ◽  
Crown Rust ◽  
Puccinia Coronata ◽  
Seed Color ◽  
Inheritance Of Resistance ◽  
Avena Sterilis ◽  
Seedling Resistance ◽  
Oat Crown Rust ◽  
Puccinia Coronata Avenae

The inheritance of resistance to oat crown rust Puccinia coronata Cda. f. sp. avenae Eriks. was studied in four accessions of Avena sterilis L. Three of the accessions, CAV 4963, CAV 1358 and CAV 1376, originated from Israel, and one, CAV 1964, from Algeria. Seedling rust tests on F2 backcross families indicated that a single recessive gene, Pc-55, in CAV 4963 conditioned seedling resistance to 10 of 12 crown rust isolates tested. In CAV 1964, a single dominant gene Pc-56 conferred resistance in both the adult and seedling stages to all crown rust isolates tested except race 239, while a second dominant gene conditioned resistance to only two of the twelve cultures used. From adult and seedling tests it appeared that the resistance in CAV 1358 and CAV 1376 was conditioned by a number of recessive minor additive genes. The genes Pc-55 and Pc-56 are not allelic with the A. sterilis derived genes Pc-35, Pc-38, Pc-40, Pc-45, Pc-46, Pc-47, Pc-48, and Pc-50. Genes Pc-39 and Pc-55 are either very closely linked or allelic and Pc-56 is not closely linked to either Pc-39 or Pc-55. The usefulness of genes Pc-55 and Pc-56 was demonstrated in tests which showed that both genes were effective against 99.8 and 94.5%, respectively, of all crown rust cultures isolated in Canada in 1974 and 1975. The genes for seed color and awn character did not appear to be linked to the crown rust resistance genes. In CAV 4963, CAV 1358 and CAV 1376 the genes for grey color and wild type awns appeared to be linked with recombination values of about 2, 23 and 18%, respectively.

Linkage of genes conferring specific resistance to oat crown rust in diploid Avena

Genome ◽  
1994 ◽  
Vol 37 (1) ◽  
pp. 92-96 ◽  
Author(s):  
James W. Gregory ◽  
Roger P. Wise
Keyword(s):  
Specific Resistance ◽  
Dominant Gene ◽  
Crown Rust ◽  
Inheritance Of Resistance ◽  
Resistance Allele ◽  
Recessive Resistance ◽  
Oat Crown Rust ◽  
Avena Strigosa ◽  
Avena Nuda ◽  
Linkage Of Genes

The inheritance of resistance to an isolate of crown rust race 276 was investigated in four diploid oat lines. F3 families derived from Avena strigosa C.I. 2630 × Avena nuda C.I. 9009, Avena wiestii C.I. 1994 × Avena strigosa C.I. 3815, and C.I. 3815 × C.I. 2630 were inoculated at the seedling stage and evaluated 9–12 days later. Segregation of the F3 families indicated that C.I. 2630 and C.I. 3815 each possess one dominant gene that conditions resistance to race 276. The alleles conferring resistance occur at two different loci, separated by 17 cM on the same chromosome, and appear to be complementary. C.I. 3815 may have an additional recessive resistance allele at a different locus on the same chromosome, 19 cM from its other resistance gene locus.Key words: crown rust, oat, Avena strigosa, Avena wiestii, Avena nuda, Puccinia coronata.

scholarly journals Inheritance of resistance to oat crown rust in recombinant inbred lines

2010 ◽  
Vol 67 (4) ◽  
pp. 435-440 ◽  
Author(s):  
Felipe André Sganzerla Graichen ◽  
José Antônio Martinelli ◽  
Luiz Carlos Federizzi ◽  
Marcelo Teixeira Pacheco ◽  
Márcia Soares Chaves ◽  
...  
Keyword(s):  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Single Gene ◽  
Genetic Resistance ◽  
Inbred Lines ◽  
Crown Rust ◽  
Inheritance Of Resistance ◽  
Oat Crown Rust ◽  
Progress Curve ◽  
Inheritance Model

Crown rust is the main disease affecting oats (Avena sativa L.), and genetic resistance has been the chief method utilized to control this disease. A population composed of 135 recombinant inbred lines, F5:6, generated by crossing the oat cultivar UFRGS 8 with the genotype Pc68/5*Starter, was assessed on the inheritance of resistance to crown rust (Puccinia coronata f. sp. avenae P. Syd. & Syd.). The evaluation of resistance in F5:6 seedlings was based on the type of infection resulting from inoculation with the race SQPT of P. coronata f. sp. avenae. The proportion of Resistant: Susceptible seedlings (R:S) was 62:64, which indicates that inheritance was governed by a single gene. The assessment of resistance inheritance in adult plants was performed in the field during the years 2004 and 2005. The distinction between resistant and susceptible classes was based on the final severity (FS) as well as the area under the disease progress curve, which was normalized and corrected (AUDPC*c). F5:6 and F5:7 were evaluated under field conditions in 2004 and 2005, demonstrating a ratio of approximately 1R:3S, which fits with a typical two genes inheritance model.

THE INHERITANCE OF RESISTANCE TO STEM AND CROWN RUST IN KYTO OATS

1968 ◽  
Vol 10 (4) ◽  
pp. 808-812 ◽  
Author(s):  
J. W. Martens ◽  
R. I. H. McKenzie ◽  
G. Fleischmann
Keyword(s):  
Stem Rust ◽  
Rust Resistance ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Stem Rust Resistance ◽  
Crown Rust ◽  
Inheritance Of Resistance ◽  
Seedling Resistance

The oat variety Kyto possesses a recessive gene, designated pg-12, which confers seedling resistance to all nine races of oat stem rust tested. This gene is inherited independently of the Pg-2, Pg-4 and pg-9 loci for seedling stem rust resistance. Kyto also possesses a dominant gene, Pc-44, for resistance to crown rust of oats. Gene Pc-44 is inherited independently of the Pg-2, Pg-4 and pg-12 loci but is associated with the pg-9 locus. Resistance conferred by genes pg-12 and Pc-44 is not expressed at constant temperatures of 25°C and above.

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