Selection of somatic fusion products in potato by hybrid vigour

S. C. Debnath, G. Wenzel

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38 Scopus citations


Tetraploid potato plants were regenerated after polyethylene-glycol-induced protoplast fusion between dihaploids. Hybrid vigour of the regenerated calli was used for preselection of fusion products. Nearly all the selected vigorous clones possessed chromosome counts at the tetraploid level. Fusion products were compared to the parental material to auto-fused plants of and to three protoclones expressing different degrees of somaclonal variation. The selected clones, where grown in vitro in growth rooms and in pots in the glasshouse, showed increased vigour compared to their parents, to auto-fused and to 4 x protoclones. Plants of clones from very vigorous calli, when assessed by height, the number of nodes per plant, leaf morphology and tuber production, showed hybrid vigour. The hypothesis that superior clones result from heterokaryons after protoplast fusion or that they arise from other in vitro events such as somaclonal variation is discussed.

Original languageEnglish
Pages (from-to)371-380
Number of pages10
JournalPotato Research
Issue number3
StatePublished - Sep 1987
Externally publishedYes


  • Solanum tuberosum
  • dihaploids
  • protoclones
  • protoplasts
  • somaclonal variation


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