No relationship was found between the independent Sr genes for seedling might be related to this Sr gene combination. The adult plant resistance of resistance and the adult plant resistance of Thatcher wheat, as measured by Thatcher was sensitive to inoculum density. Although this character had rust severity. Pyramids of seedling resistance genes Sr5, Srl2, Srl6, and been selected successfully under heavy inoculum density at the end of the SrTc did not improve resistance to stem rust. The performance of some season, the resistance was most apparent at stage 24 (early milk). Under progeny lines with both Srl 2 and SrTc was similar to Thatcher's, and this light inoculum density, however, the greatest difference existed in the suggests that the factor(s) involved in the adult plant resistance of Thatcher terminal disease severities.

No abstract