Genetic Relationships of Crown Rust Resistance, Grain Yield, Test Weight, and Seed Weight in Oat

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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Inheritance of Crown Rust Resistance in a Perennial Ryegrass Genotype of the Cultivar Arvella

Quantitative Traits Breeding for Multifunctional Grasslands and Turf ◽

10.1007/978-94-017-9044-4_34 ◽

2014 ◽

pp. 249-253

Author(s):

Franz Xaver Schubiger ◽

B. Boller

Keyword(s):

Perennial Ryegrass ◽

Rust Resistance ◽

Crown Rust ◽

Crown Rust Resistance

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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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Evaluating landrace oats (Avena sp.) collected in Tunisia for crown rust resistance under natural infection

Euphytica ◽

10.1007/s10681-007-9393-7 ◽

2007 ◽

Vol 157 (1-2) ◽

pp. 27-34 ◽

Cited By ~ 2

Author(s):

I. Hammami ◽

M. B. Allagui ◽

M. Chakroun ◽

M. El Gazzeh

Keyword(s):

Rust Resistance ◽

Natural Infection ◽

Crown Rust ◽

Crown Rust Resistance

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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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