Abstract
Protoplasts isolated from leaf mesophyll cells of Dianthus chinensis and D. barbatus were fused by polyethylene glycol (PEG). Calli exhibiting vigorous growth were selected from the PEG-treated protoplasts and shoots were regenerated from one of these calli after 5 months of culture. These shoots readily rooted and continuously produced flowers in the in-vitro condition. The data on flower color, chromosome number, and esterase isozyme patterns indicated that this plantlet was an interspecific somatic hybrid. The hybridity of the plantlet was also confirmed by nuclear rDNA analysis. This report provides the possibility of applying the somatic hybridization technique for the genetic improvement of the genus Dianthus.
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