DISTRIBUTION AND VIRULENCE OF PUCCINIA-CORONATA F SP AVENAE IN CANADA IN 1991

被引：10

作者：

CHONG, J

SEAMAN, WL

机构：

[1] Research Station, Agriculture Canada, Winnipeg, MB, R3T 2M9

[2] Plant Research Centre, Agriculture Canada, Ottawa, ON

来源：

CANADIAN JOURNAL OF PLANT PATHOLOGY-REVUE CANADIENNE DE PHYTOPATHOLOGIE | 1993年 / 15卷 / 01期

关键词：

D O I：

10.1080/07060669309500849

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

In 1991, crown rust of oat (Avena sativa), caused by Puccinia coronata, was first observed in trace amounts on susceptible oat in southern Manitoba on June 28. By mid August, crown rust severities of 10-40% were observed in commercial oat fields. Using 20 backcross lines, each with a single gene for resistance, as differentials, 112 virulence phenotypes were identified from 212 isolates from Manitoba and eastern Saskatchewan; phenotypes virulent to both Pc38 and Pc39 accounted for 47.2% of the isolates. Virulence was not detected to resistance genes Pc45 and Pc48 in the prairie region in 1991, and virulence to Pc68 was detected for the first time since its isolation from an A. sterilis accession in 1982. In Ontario, 19 virulence phenotypes were identified from 31 isolates. Virulence to Pc39 remained high at 67.7%, and virulence to Pc38 increased from 7.2% in 1990 to 32.3% in 1991. No virulence was detected to Pc48, Pc50, Pc54, Pc58, Pc59, Pc60, Pc61, Pc67, and Pc68 in Ontario in 1991.

引用

页码：41 / 45

页数：5

共 5 条

[1]

Chong J., Seaman W.L., Virulence and distribution of puccinia coronata in canada in 1988, Can. J. Plant Pathol, 11, pp. 439-442, (1989)

[2]

Chong J., Seaman W.L., Virulence and distribution of puccinia coronata in canada in 1989, Can. J. Plant Pathol, 12, pp. 431-435, (1990)

[3]

Chong J., Seaman W.L., Distribution and virulence of puccinia coronata in canada in 1990, Can. J. Plant Pathol, 13, pp. 365-370, (1992)

[4]

Fleischmann G., Baker R.J., Oat Crown Rust Race Differentiation: Replacement of the Standard Differential Varieties with a New Set of Single Resistance Gene Lines Derived from Avenasterilis, 49, pp. 1433-1437, (1971)

[5]

Wong L., McKenzie R., Harder D.E., Martens J.W., The inheritance of resistance to puccinia coronata avenue and of floret characters in avena sterilis, Can. J. Genet. Cytol, 25, pp. 329-335, (1983)

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