Abstract
To select suitable genetic resources for scent breeding, we qualitatively and quantitatively analyzed floral scent emitted from 9 wild Gladiolus species. Dynamic headspace collection was performed and scent compounds emitted from the wild species were analyzed using gas chromatography-mass spectrometry, resulting in detection of twenty scent compounds. The analyzed species were divided into 4 groups;—Linalool/Benzenoid group, Nerol group, Ionone group or Ocimene/Caryophyllene group. Based on the kind and amount of scent compounds we selected G. orchidiflorus, G. recurvus, G. tristis and G. watermeyeri as potential genetic resources for fragrance. Temporal changes in emissions were investigated in 3 promising species that were selected. G. orchidiflorus emitted the maximum amount of scent compounds between 10:00 and 14:00 while the maximum output of G. recurvus and G. tristis was between 18:00 and 22:00. This differential release of scent compounds during the day is an important character to select for, in addition to the quality and quantity of scent compounds, in breeding program for Gladiolus.
