Abstract
Using somatic hybrid cell lines Arabidopsis thaliana+Brassica campestris, obtained by cloning individual protoplast-fusion products as starting material, shoots and flowering plants have been regenerated. Cytological, biochemical, and morphological analyses indicate that genetic material of both species is present in the resultant plants. Shoots and plants obtained from different lines and different regeneration events differed morphologically and genetically. Most regenerants show morphological abnormalities and unusual organizational patterns. Flowering forms have so far been sterile. "Asymmetric" hybrids (i.e., hybrids bearing most genetic material of one of the parent species and only few chromosomes of the other) were more regular in morphology. The results represent the first case of intergeneric-intertribal hybridization of flowering plants.
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