In all breeding work one finds that certain individuals are outstanding in the production of superior progeny. In animal breeding these individuals form the basis for pedigreed stock. An intensive study on the parentage of rose varieties has revealed that certain roses also have produced more named offspring than others. To obtain this information, it was necessary to make a search through the world\u27s most important literature on the rose. This study resulted in the compilation of an index of about 5,000 rose varieties on which parentage data had been recorded
