Leibniz Institute of Plant Genetics and Crop Plant Research, Data Inspection Group, Corrensstrasse 3, 06466 Gatersleben, Germany. seifert@ipk-gatersleben.de|Leibniz Institute of Plant Genetics and Crop Plant Research, Data Inspection Group, Corrensstrasse 3, 06466 Gatersleben, Germany. seifert@ipk-gatersleben.de|Leibniz Institute of Plant Genetics and Crop Plant Research, Data Inspection Group, Corrensstrasse 3, 06466 Gatersleben, Germany. seifert@ipk-gatersleben.de|Leibniz Institute of Plant Genetics and Crop Plant Research, Data Inspection Group, Corrensstrasse 3, 06466 Gatersleben, Germany. seifert@ipk-gatersleben.de