PATHOGENICITY OF PUCCINIA-RECONDITA F-SP TRITICI IN MOROCCO DURING 1985, 1988, 1990, AND 1992

被引：8

作者：

EZZAHIRI, B ^{[1
]}

DIOURI, S ^{[1
]}

ROELFS, AP ^{[1
]}

机构：

[1] UNIV MINNESOTA,USDA ARS,CEREAL RUST LAB,ST PAUL,MN 55108

来源：

PLANT DISEASE | 1994年 / 78卷 / 04期

关键词：

D O I：

10.1094/PD-78-0407

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Surveys of pathogenic races of Puccinia recondita f. sp. tritici in Morocco in 1985, 1988, 1990, and 1992 indicated the presence of 12 unified numeration (UN) races. Virulence frequencies were high to Lr1, 2a, 3, 10, 16, and 17 and low to Lr3ka, 9, 24, and 26. The virulence frequency to Lr2a declined in 1990 and 1992. Isolates from durum wheats were generally less virulent than those from bread wheats to the designated Lr genes in a bread wheat background. The virulence diversity levels were higher in 1990 and 1992 than in 1985 and 1988. The populations with the highest phenotypic diversity were obtained from durum wheat cultivars and the susceptible bread wheat cultivar Siete Cerros. Durum wheat is often grown in marginal areas where the alternate host Anchusa italica occurs, while Siete Cerros is grown under irrigation in the south.

引用

页码：407 / 410

页数：4

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