CROWN RUST RESISTANCE IN HYBRID AVENA (AVENA STERILIS AND AVENA SATIVA)

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.

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Leggett Oat

Canadian Journal of Plant Science ◽

10.4141/cjps06030 ◽

2007 ◽

Vol 87 (3) ◽

pp. 509-512 ◽

Cited By ~ 13

Author(s):

J. W. Mitchell Fetch ◽

S. D. Duguid ◽

P. D. Brown ◽

J. Chong ◽

T. G. Fetch ◽

...

Keyword(s):

Avena Sativa ◽

Rust Resistance ◽

Barley Yellow Dwarf Virus ◽

Kernel Weight ◽

Crown Rust ◽

Good Resistance ◽

Beta Glucan ◽

Milling Quality ◽

Crown Rust Resistance ◽

Yellow Dwarf Virus

Leggett is the first oat (Avena sativa L.) cultivar released in western Canada carrying the crown rust resistance gene Pc94. Leggett carries the crown rust resistance combination Pc68 and Pc94, which provides good resistance to the crown rust populations currently present on the eastern Canadian Prairies. As a result of the presence of Pc94 providing resistance to oat crown rust, this line should exhibit excellent yield stability in the rust-prone regions of the prairies. Leggett has very good resistance to loose and covered smut, resistance to the prevalent races of oat stem rust other than NA67, but poor tolerance to barley yellow dwarf virus (BYDV). Leggett has kernel characteristics suited to milling end uses, with high test weight and 1000-kernel weight and high percent plump kernels. The beta-glucan content of Leggett is equal to or higher than that of the checks, making it a desirable milling quality cultivar. Key words: Oat, Avena sativa L., cultivar description, crown rust resistance, milling oat, Pc94

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

Canadian Journal of Genetics and Cytology ◽

10.1139/g83-052 ◽

1983 ◽

Vol 25 (4) ◽

pp. 329-335 ◽

Cited By ~ 20

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.

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THE INHERITANCE OF CROWN RUST RESISTANCE IN SELECTIONS FROM TWO ISRAELI COLLECTIONS OF AVENA STERILIS

Canadian Journal of Genetics and Cytology ◽

10.1139/g64-029 ◽

1964 ◽

Vol 6 (2) ◽

pp. 232-236 ◽

Cited By ~ 9

Author(s):

R. I. H. McKenzie ◽

G. Fleischmann

Keyword(s):

Rust Resistance ◽

Crown Rust ◽

Avena Sterilis ◽

Crown Rust Resistance

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Discovery and Chromosomal Location a Highly Effective Oat Crown Rust Resistance Gene Pc50-5

International Journal of Molecular Sciences ◽

10.3390/ijms222011183 ◽

2021 ◽

Vol 22 (20) ◽

pp. 11183

Author(s):

Joanna Toporowska ◽

Sylwia Sowa ◽

Andrzej Kilian ◽

Aneta Koroluk ◽

Edyta Paczos-Grzęda

Keyword(s):

Rust Resistance ◽

Crown Rust ◽

Growth Stages ◽

Avena Sterilis ◽

Breeding Programs ◽

Sequence Characterized Amplified Region ◽

Specific Pcr ◽

Crown Rust Resistance ◽

Highly Effective ◽

Oat Cultivars

Crown rust, caused by Puccinia coronata f. sp. avenae, is one of the most destructive fungal diseases of oat worldwide. Growing disease-resistant oat cultivars is the preferred method of preventing the spread of rust and potential epidemics. The object of the study was Pc50-5, a race-specific seedling crown rust resistant gene, highly effective at all growth stages, selected from the differential line Pc50 (Avena sterilis L. CW 486-1 × Pendek). A comparison of crown rust reaction as well as an allelism test showed the distinctiveness of Pc50-5, whereas the proportions of phenotypes in segregating populations derived from a cross with two crown rust-susceptible Polish oat cultivars, Kasztan × Pc50-5 and Bingo × Pc50-5, confirmed monogenic inheritance of the gene, indicating its usefulness in oat breeding programs. Effective gene introgression depends on reliable gene identification in the early stages of plant development; thus, the aim of the study was to develop molecular markers that are tightly linked to Pc50-5. Segregating populations of Kasztan × Pc50-5 were genotyped using DArTseq technology based on next-generation Illumina short-read sequencing. Markers associated with Pc50-5 were located on chromosome 6A of the current version of the oat reference genome (Avena sativa OT3098 v2, PepsiCo) in the region between 434,234,214 and 440,149,046 bp and subsequently converted to PCR-based SCAR (sequence-characterized amplified region) markers. Furthermore, 5426978_SCAR and 24031809_SCAR co-segregated with the Pc50-5 resistance allele and were mapped to the partial linkage group at 0.6 and 4.0 cM, respectively. The co-dominant 58163643_SCAR marker was the best diagnostic and it was located closest to Pc50-5 at 0.1 cM. The newly discovered, very strong monogenic crown rust resistance may be useful for oat improvement. DArTseq sequences converted into specific PCR markers will be a valuable tool for marker-assisted selection in breeding programs.

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