Transcriptome analysis reveals the genes involved in S-alk(en)ylcysteine sulfoxide biosynthesis and its biosynthetic location in postharvest chive (Allium schoenoprasum L.)

•Transcriptome analysis identified genes involved in S-alk(en)ylcysteine sulfoxides biosynthesis in chive.•S-alk(en)ylcysteine sulfoxides were mainly synthesized in the green leaf of chive.•S-alk(en)ylcysteine sulfoxides in green leaf of chive was transported to white stalk during storage.