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Parasexual interspecific plant hybridization.

P S Carlson1, H H Smith, R D Dearing

  • 1Department of Biology, Brookhaven National Laboratory, Upton, New York 11973.

Proceedings of the National Academy of Sciences of the United States of America
|August 1, 1972
PubMed
Summary

Scientists created interspecific plant hybrids using parasexual reproduction. Protoplast fusion of Nicotiana species yielded somatic hybrids identical to sexually produced ones, demonstrating a viable alternative breeding method.

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The influence of genomes on autonomous growth of pith cultures of Nicotiana glauca-Langsdorffii hybrids.

Planta·2014

Area of Science:

  • Plant biotechnology
  • Plant breeding
  • Somatic hybridization

Background:

  • Interspecific plant hybrids offer valuable genetic resources.
  • Traditional sexual hybridization can be limited by reproductive barriers.
  • Parasexual hybridization provides an alternative route for creating novel plant combinations.

Purpose of the Study:

  • To produce interspecific plant hybrids using parasexual procedures.
  • To regenerate whole plants from fused protoplasts of Nicotiana glauca and Nicotiana langsdorffii.
  • To confirm the identity of somatic hybrids through biochemical and morphological analysis.

Main Methods:

  • Isolation and fusion of protoplasts from Nicotiana glauca and Nicotiana langsdorffii.
  • Regeneration of fused protoplasts into whole plants.

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  • Selective screening based on differential growth on defined media to isolate somatic hybrids.

    • Main Results:

    • Successful production of interspecific somatic hybrids between Nicotiana glauca and Nicotiana langsdorffii.
    • Somatic hybrids exhibited biochemical and morphological characteristics identical to sexually produced amphiploids.
    • A selective screening method effectively isolated desired hybrids from mixed cell populations.

    Conclusions:

    • Parasexual hybridization is an effective method for producing interspecific plant hybrids.
    • Somatic hybrids generated via protoplast fusion are genetically equivalent to sexually derived hybrids.
    • This technique overcomes sexual incompatibility barriers in plant breeding.