Interspecific hybrid between Allium cepa and Allium sativum

Summary

Interspecific hybrids between Allium cepa and Allium sativum were obtained using the fertile clone A. sativum as the male parent. The nascent embryos which formed shortly in interspecific hybridization between A. cepa and A. sativum were rescued by ovule culture at an early stage. The zygotes or proembryos developed in Murashige and Skoog medium containing 5.7×10-8 M indole-3-butyric acid (IBA). Once developed, the embryos were taken out of the ovule and cultured on embryo culture medium where they regenerated into whole plants. The hybridity of the plants obtained was examined by morphological observation, chromosome analysis, and ribosomal RNA gene analysis. The analyses proved that the plants were mature sexual hybrids between A. cepa and A. sativum. Each hybrid plant had keeled but fistulose leaves and formed a bulb resembling that of A. cepa. The hybrids produced not only S-propenyl-l-cysteine sulfoxide, which is the major flavor precursor in A. cepa, but also S-allyl-l-cysteine sulfoxide (alliin), which is characteristic of A. sativum.

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Communicated by I. Potrykus

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Ohsumi, C., Kojima, A., Hinata, K. et al. Interspecific hybrid between Allium cepa and Allium sativum . Theoret. Appl. Genetics 85, 969–975 (1993). https://doi.org/10.1007/BF00215036

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Key words

  • Interspecific hybrid
  • Onion
  • Garlic
  • Nascent embryo rescue
  • Flavor precursors