We aim for
- virulence analysis of stem-rust populations in Germany and Poland to monitor race composition and complexity as a prerequisite to estimate durability of resistance,
- establishment of a diversity panel of cultivars/populations with a varying degree of stem rust resistance,
- identification of new stem rust resistance genes by leaf-segment tests,
- molecular analysis of segregating rye populations for adult-plant stem rust resistance, and
- association mapping as “case-control study” with foreign germplasm resources.
Tasks 1 – 3 will be fulfilled by JKI for Germany and IPP-NRI for Poland in a balanced working scheme. The outcome of tasks 4 - 5 will be distributed among German and Polish partners, Polish germplasm and testing sites are involved.
These innovation targets will result in
- defined, highly virulent stem rust races necessary for resistance testing,
- new, effective resistance genes that can be used in breeding programs and
- linked molecular markers enabling the breeding companies to efficiently select for the first time for stem-rust resistances in the adult-plant stage.