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Combinations of effective leaf rust resistance genes that condition resistance to many leaf rust races are key to the development of wheat cultivars with long-lasting resistance to leaf rust caused by Puccinia triticina. A population of F 6 recombinant inbred lines (RILs) derived from the cross ‘Thatcher*3/Americano 25e’ was evaluated for segregation of adult plant leaf...
The wheat (Triticum aestivum L.) gene Lr34/Yr18 conditions resistance to leaf rust, stripe rust, and stem rust, along with other diseases such as powdery mildew. This makes it one of the most important genes in wheat. In Canada, Lr34 has provided effective leaf rust resistance since it was first incorporated into the cultivar Glenlea, registered in 1972. Recently, molecular markers were discovered...
Wheat mutants, selected on an altered resistance phenotype to Puccinia striiformis f.sp. tritici, the causal agent of yellow rust, were assessed in greenhouse tests to determine the growth stage at which the mutant phenotype was expressed and which components of yellow rust resistance were altered. Four of the mutants showed reduced levels of yellow rust infection, while three exhibited increased...
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