Somatic Embryogenesis and Genetic Modification of Vitis

Area of Science:

• Plant Biotechnology
• Molecular Biology
• Agricultural Science

Background:

• Grapevine embryogenic cultures are valuable for genetic improvement.
• Precision breeding (PB) offers a targeted approach to enhance grapevine cultivars.
• Conventional breeding methods have limitations in introducing specific traits.

Purpose of the Study:

• To demonstrate the efficacy of precision breeding (PB) in grapevine.
• To establish a method for regenerating genetically modified grapevine plants.
• To validate the use of embryogenic cultures as target tissues for PB.

Main Methods:

• Induction of embryogenic cultures from grapevine explants (leaves, stamens, pistils).
• Maintenance and proliferation of embryogenic callus and proembryonic masses.
• Agrobacterium-mediated transformation of somatic embryos with egfp/nptII gene.
• Regeneration of modified plants through secondary embryogenesis and germination.

Main Results:

• Successfully induced and maintained grapevine embryogenic cultures.
• Generated uniformly modified somatic embryos exhibiting green fluorescence and kanamycin resistance.
• Regenerated grapevine plants containing the non-grapevine-derived egfp/nptII fusion gene.
• Observed uniform green fluorescent protein (GFP) fluorescence in all tissues of regenerated plants.

Conclusions:

• Precision breeding (PB) is a viable method for genetic modification of grapevines.
• Embryogenic cultures serve as effective targets for PB, enabling trait introduction.
• Regenerated plants demonstrate successful integration and expression of foreign genes via PB.