Abstract:

The aim was to study the leaf rust resistance genes of wheat cultivars in China. A total of 56 winter wheat cultivars and advanced lines were used to postulate leaf rust resistance genes at the seedling stage. These genotypes were also planted in the field for characterization of slow rusting responses to leaf rust in two cropping seasons. Nine leaf rust resistance genes Lr26, Lr34, Lr1, Lr2a, Lr11, Lr20, Lr30, Lr33 and Lr44 were found in 36 wheat lines. Resistance gene Lr26 was present in 28 accessions. Lr1 and Lr20 were each detected in 6 entries, and 4 lines carried Lr30. Lr11 and Lr44 were each found in 2 cultivars. Lr2a, Lr33 and Lr34 were each present in one line. Forty six genotypes showed slow leaf rusting resistance in two cropping seasons. Screened seedling and adult resistant varieties could be used in breeding resistant cultivars with durable resistance to leaf rust.