The Institute for Grapevine Breeding Geilweilerhof in Siebeldingen (Pfalz-Germany) emerged from two institutions that were founded independently of each other in the 1920s. In 1924, August Ludowici (1866-1945), the last private owner of the Geilweilerhof, donated vineyards to the Palatinate Wine Growers' Association free of charge. Two years later, Peter Morio (1887-1960), a councillor of agriculture, founded the branch "vine breeding" of the Bavarian State Institute for Viticulture, Fruit Growing and Horticulture in Würzburg on this property. In the same year, Dr. Erwin Baur (1875-1933) founded the Kaiser Wilhelm Institute for Breeding Research in Müncheberg (Mark Brandenburg), and Dr. Bernhard Husfeld (1900-1970) became head of the vine breeding department. Both Peter Morio and Bernhard Husfeld subsequently worked intensively on breeding grape varieties resistant to phylloxera and the two types of mildew. After the Second World War Husfeld moved his breeding material to the Geilweilerhof. The company he founded leased the farm and founded the "Research Institute for Grapevine Breeding". Husfeld headed the institute until 1970, after which his assistant of many years, Dr. Gerhardt Alleweldt (1927-2005), took over the management.