The main goal of WP6 is to deliver markers for the introgression of genomic regions conferring enhanced frost resistance from donor populations to elite rye germplasm. The diversity panel of rye inbred lines analyzed in this WP includes the parental genotypes of the semi-dwarf hybrids established in WP2 and evaluated for their test-cross performance in WP3. Knowledge on the genetic architecture of frost tolerance will be implemented in WP5 to adapt the FROSTOL model for rye.