Resistance of Heterodera filipjevi (Madzhidov) Stelter populations against wheat genotypes

Two known resistance genes for CCN (Cre1 and Cre5) were transferred from hexaploid bread wheat to tetraploid Durum wheat in CIMMYT Mexico to establish if their resistance would be effective in the tetraploid background. These lines were screened against both H. filipjevi Yozgat and Haymana populations. Results indicated there was no relationship to the resistance whether the gene was present or not (by marker confirmed studies in CIMMYT Mexico). Furthermore, as with the international pathotype differential, the reaction of Yozgat and Haymana isolates with these lines was often different. The results of these two experiments suggest that H. filipjevi has different pathotypes in Turkey which requires further confirmation.