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Puccinia striiformis f. sp. tritici inoculations. Yellow rust infection phenotypes 14 days after inoculation on Avocet*6/Yr1 (A) and Avocet S (B) inoculated with mock (i), the Yr1‐avirulent race 232E137 (ii) and the Yr1‐virulent race 169E136 (iii). The incompatible interaction (Aii) shows small necrotic flecks, whereas the three compatible interactions (Aiii, Bii and Biii) show yellow rust pustules.
