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Due to the global warming and dynamic changes in pathogenic virulence, leaf rust caused by Puccinia triticina has greatly expanded its epidermic region and become a severe threat to global wheat production. Leaf rust, caused by biotrophic fungal pathogen Puccinia triticina Erikss., is one of the most wide-spread and severe diseases in wheat all over the world.
Type of Resistance | Resistance Stage | Resistant Features | Cloned Resistance Genes |
---|---|---|---|
Race-specific resistance | Seedling stage | Seedling resistance. Immune or hypersensitive response (cell death/necrosis) observed on the leaf surface. May be lost at adult plant stage against multiple Pt pathotypes in the field. | Lr1, Lr10, Lr13, Lr21, Lr22a, Lr42 (NBS-LRR) [6][7][8][9][10][11] Lr14a (Ankyrin repeats and Ca2+ channels) [14] Lr9/Lr58 (Tandem kinase) [15] |
Adult plant stage | Hypersensitive adult plant resistance (APR)/All-stage (AS) race-specific resistance. Immune or hypersensitive response (cell death/necrosis) observed on the leaf surface. | ||
Slow rusting | Adult plant stage | Non-race-specific resistance. A lower level but more durable resistance. Rust infection and sporulation can be accomplished in a much delayed and reduced manner. | Lr34 (ATP-binding cassette transporter) [16] Lr67 (Hexose transporter) [17] |