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Regeneration of plants from protoplasts of rapid cycling Brassica oleracea L.

Abstract

Rapid cycling Brassica species have great potential in plant genetic research because of their short life cycles and their minimal space requirements. Rapid cycling B. oleracea can be grown with up to six generations per year. Protoplast culture of this genotype can be applied for gene transfer by direct DNA uptake and by protoplast fusion. We here report on fast regeneration of flowering plants from protoplasts of rapid cycling B. oleracea. Regeneration frequencies of 27–65% were achieved with multiple shoots developing from individual calli. The regenerated plants were grown to maturity, and flowering and other morphological characteristics were monitored. The regenerants flowered within a similar time frame as plants grown from seeds. The ploidy level of regenerated and seed-grown plants was measured by flow cytometry. Many (20–45%) of the regenerants were tetraploid. Although only few seeds could be obtained from the tetraploids, large numbers of seeds with good germination were recovered from the diploid regenerants.

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Abbreviations

MS-3,0:

Murashige and Skoog medium containing 3% sucrose and no growth regulators

MES:

1-morpholino-ethane sulfonate

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Communicated by C. F. Quiros

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Hansen, L.N., Earle, E.D. Regeneration of plants from protoplasts of rapid cycling Brassica oleracea L.. Plant Cell Reports 13, 335–339 (1994). https://doi.org/10.1007/BF00232632

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  • DOI: https://doi.org/10.1007/BF00232632

Keywords

  • Ploidy Level
  • Multiple Shoot
  • Brassica Oleracea
  • Protoplast Fusion
  • Space Requirement