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Achieving durable resistance to leaf rust (LR), caused by Puccinia triticina, in wheat has been one of the main objectives of breeding programs. Durability of LR resistance is considered to be associated with adult plant resistance (APR) genes that are quantitatively inherited and whose expression is largely influenced by environment. Our objective was to study the effects and interactions of APR...
Leaf rust, caused by Puccinia triticina, is an important foliar disease of wheat (Triticum aestivum L.) worldwide. In the present study, CIMMYT line 19HRWSN-122 and 36 lines with known Lr (leaf rust resistance) genes were inoculated with 13 Chinese P. triticina pathotypes for postulation of Lr genes at the seedling stage. Line 19HRWSN-122 showed high resistance to all 13 P. triticina pathotypes in...
Three race-specific genes were identified in a cross between the durably leaf rust resistant wheat cultivar Buck Poncho (BP) and leaf rust susceptible cultivar Purple Straw (P). Two seedling resistance genes, temporarily named LrBP1 and LrBP2, and one adult plant resistance gene named LrBP3 were identified. Multi-pathotype tests on seedlings of BP and Thatcher near-isogenic lines carrying single resistance...
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