design: DNA isolation of pestled and homogenized hazelnut leaves using the peqGOLD DNA Mini Kit (Peqlab, VWR), library preparation was performed using the Nextera XT DNA Library Prep Kit and the Nextera XT Index Kit from Illumina Inc. (San Diego, USA) and an applied amount of 1 ng DNA. The loading concentration on the chip was 10 pM. The sequencing was performed by a MiSeqTM using the MiSeq v2 Reagent Kit from Illumina Inc. (San Diego, USA)