A pedigree map of sunflower (Helianthus annuus) was prepared which contains detailed information on North American sunflower materials, e.g., published in various issues of Crop Science. S catalogue provides futher information on the pedigree and important agronomic traits, like disease resistance, oil content and maturity of the released germplasm pools, germplasms, populations, lines and cultivars. For verification of the relationships shown in the pedigree map, the restorer lines RHA 278 and RHA 279, which were derived from an F5 sib-selection, were investigated by Southern analysis with 75 genomic probe/enzyme combinations. They differ in the Pl2-gene conferring resistance to downy mildew, caused by Plasopara halstedii (Farl.) Berl. et de Toni. However, no restriction fragment length polymorphism (RFLP) could be detected. This result confirms the supposed close relationship between the two lines.