2 Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstr. 3, 06466, Stadt Seeland, http://www.ipk-gatersleben.de/.
3 Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstr. 3, 06466 Stadt Seeland, http://www.ipk-gatersleben.de/.