Abstract
One thousand and ninety-two poplars were regenerated in vitro from callus of 13 poplar clones representing the Leuce, Aigeiros and Tacamahaca sections. At lest 44 of the regenerants differed in some way from the original clones. Somaclonal variation occurred more frequently in poplars of the Leuce section (8%) than in those of the Aigeiros or Tacamahaca sections (1%). Variation was noticed in growth habit, leaf shape or indentation but not in the reaction to four Melampsora races. However, after one growing season in the field, a few regenerants from calli of two clones (‘Ogy’ and ‘Rap’) differed in their susceptibility vis à vis the original clones. Cultivation of callus from Leuce poplars that had survived exposure to increasing concentrations of toxins from Hypoxylon mammatum gave rise to a toxin-tolerant line from which toxin tolerant plants were regenerated. Flow cytometry to measure the DNA content of nuclei showed that regenerants tended to be tetraploid.
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Abbreviations
- NAA:
-
naphthaleneacetic acid
- BAP:
-
benzylaminopurine
- TDZ:
-
thidiazuron
- MS:
-
Murashige & Skoog medium
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Antonetti, P.L.E., Pinon, J. Somaclonal variation within poplar. Plant Cell Tiss Organ Cult 35, 99–106 (1993). https://doi.org/10.1007/BF00043946
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DOI: https://doi.org/10.1007/BF00043946