January
2010
, Volume
94
, Number
1
Pages
45
-
53
Authors
Z. F. Li, Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China;
X. C. Xia, Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing 100081, China;
Z. H. He, Institute of Crop Science, National Wheat Improvement Center, Chinese Academy of Agricultural Sciences and CIMMYT China Office, 12 Zhongguancun South Street, Beijing 100081, China;
X. Li,
L. J. Zhang,
H. Y. Wang,
Q. F. Meng, and
W. X. Yang, Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China;
G. Q. Li, Plant Protection Institute, Chinese Academy of Agricultural Sciences, 2 Yuanmingyuan West Road, Beijing 100091, China; and
D. Q. Liu, Department of Plant Pathology, College of Plant Protection, Agricultural University of Hebei, Biological Control Center for Plant Diseases and Plant Pests of Hebei, 289 Lingyusi Street, Baoding 071001, Hebei, China
Affiliations
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RelatedArticle
Accepted for publication 9 August 2009.
Abstract
ABSTRACT
Identification of resistance genes is important for developing leaf rust resistant wheat (Triticum aestivum) cultivars. A total of 102 Chinese winter wheat cultivars and advanced lines were inoculated with 24 pathotypes of Puccinia triticina for postulation of leaf rust resistance genes effective at the seedling stage. These genotypes were also planted in the field for characterization of slow rusting responses to leaf rust in the 2006--07 and 2007--08 cropping seasons. Fourteen leaf rust resistance genes—Lr1, Lr2a, Lr3bg, Lr3ka, Lr14a, Lr16, Lr17a, Lr18, Lr20, Lr23, Lr24, Lr26, Lr34, and LrZH84—either singly or in combinations, were postulated in 65 genotypes, whereas known resistance genes were not identified in the other 37 accessions. Resistance gene Lr26 was present in 44 accessions. Genes Lr14a and Lr34 were each detected in seven entries. Lr1 and Lr3ka were each found in six cultivars, and five lines possessed Lr16. Lr17a and Lr18 were each identified in four lines. Three cultivars were postulated to possess Lr3bg. Genes Lr20, Lr24, and LrZH84 were each present in two cultivars. Each of the genes Lr2a and Lr23 may exist in one line. Fourteen genotypes showed slow leaf rusting resistance in two cropping seasons.
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