Abstract
Cytoplasmic hybrids (cybrids) between the two sexually incompatible species Nicotiana tabacum and Petunia hybrida were constructed. Three green plants were obtained after fusion of leaf protoplasts from a cytoplasmic chlorophyll deficient mutant of tobacco, with iodoacetamide inactivated protoplasts of P. hybrida. All regenerated plants were phenotypically similar to tobacco, but male and female sterile. Chromosome and isoenzyme analyses of the nuclear genome, and restriction and blot hybridization analyses of the organelle composition revealed that the regenerated cybrids possessed nuclear genome of N. tabacum, chloroplasts from P. hybrida and recombinant chondriomes. In vitro culture of ovules from one cybrid plant pollinated by N. tabacum resulted in the regeneration of cytoplasmic male sterile progeny plants. Cross-section of anthers from these CMS plants showed that male sterility was due to a failure of tapetum development.
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Dragoeva, A., Atanassov, I. & Atanassov, A. CMS due to tapetal failure in cybrids between Nicotiana tabacum and Petunia hybrida. Plant Cell, Tissue and Organ Culture 55, 67–70 (1998). https://doi.org/10.1023/A:1026421014265
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DOI: https://doi.org/10.1023/A:1026421014265