Within Plant Breeding major emphasis is placed on the development, characterisation, maintenance and exploitation of genetic material. To this end collections of plants (segregating populations, Nils, Rils, DH, transformation host etc) are made in the most important focus crops Brassica rapa, barley, potato, tomato, lily and rose. Besides this, tools for efficient breeding are developed like molecular markers for traits (genes, libraries, maps etc). This leads to the deposition of large amounts of phenotypic and descriptive data (Transcriptomics, Proteomics, Metabolomics, Microarray, consumer tests) in databases. The efficient use and integration of all these datasets is made possible through the development and implementation of statistical & computer programmes which we develop as well.