Evaluation of Wheat Leaf Rust Resistance Genes in 10 Wheat Genotypes

Wheat leaf rust (Puccinia triticina) is one of the most important plant diseases in the world, and growing resistant cultivars is the most economical, effective and environmentally safe method for controlling this disease. With the aim of evaluating leaf rust resistance, 10 uncharacterized wheat genotypes, as well as 35 lines with known leaf rust resistance genes (Lr genes), were exposed to 12 Chinese P. triticina pathotypes at both seedling and adult stages. Two wheat genotypes, 09p205 and 09p200, showed high resistance to all the tested pathotypes at both seedling and adult stages. Three accessions, Xinmai 16, 00-225-2-1-2-2, and 21941-6, showed resistance at the adult stage. Four genotypes, 21898-3, 21924-4, 21915-3, and 21982-1, showed slow rusting resistance. In addition, 24 molecular markers were used to assess the presence of 20 known Lr genes. In the 10 genotypes analyzed Lr2c, Lr3ka, Lr9, Lr14a, Lr26, Lr34, and Lr37 were detected, either alone or in combination.