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  • Cytoplasmic male sterility  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Characterization of nuclear and cytoplasmic information in the progeny of a somatic hybrid between male sterile Nicotiana tabacum and N. glutinosa (1984)
    Springer
    Theoretical and applied genetics 68 (1984), S. 95-100 
    Details
    ISSN: 1432-2242
    Keywords: Nicotiana somatic hybrid ; Ribosomal RNA gene ; Chromosome ; Chloroplast DNA ; Cytoplasmic male sterility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Several nuclear and cytoplasmic characters of the back-crossed progeny of a somatic hybrid between male sterile Nicotiana tabacum (N. debneyi cytoplasm) and N. glutinosa have been analysed. Progeny were obtained by repeated back-crossing of a somatic hybrid with pollen from either N. tabacum or N. glutinosa. Nuclear ribosomal RNA genes (rDNA) were found to be a reliable marker to determine the constitution of nuclear genomes in the progeny. The progeny obtained by back-crossing with N. tabacum pollen maintained uniformity in leaf morphology. On the other hand, variation in leaf morphology was observed in the second back-cross population obtained with N. glutinosa pollen. This may be due to a variable contribution of N. tabacum chromosomes. Segregation of rDNA was also found in individuals of the same back-crossed progeny, but was not related to the chromosome number. The stable inheritance of chloroplast DNA in the back-crossed generation was confirmed regardless of the type of pollen donor. Male sterility was consistently maintained throughout several generations, suggesting that the nuclear genome of either N. tabacum or N. glutinosa does not influence the expression of cytoplasmic male sterility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252321
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  • 2
    Electronic Resource
    Electronic Resource
    Somatic hybridization between male sterile Nicotiana tabacum and N. glutinosa through protoplast fusion (1982)
    Springer
    Theoretical and applied genetics 61 (1982), S. 69-72 
    Details
    ISSN: 1432-2242
    Keywords: Protoplast fusion ; Cytoplasmic male sterility ; Tobacco ; Fraction I protein ; TMV resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Protoplasts derived from suspension cultured cells of cytoplasmic male sterile Nicotiana tabacum (N. debneyi cytoplasm) and of fertile N. glutinosa were fused with the aid of polyethylene glycol (PEG). Out of 1,089 colonies developed from PEG-treated protoplasts, 29 restored whole plants. A somatic hybrid plant was selected on the basis of isoelectrofocusing analysis of Fraction I protein in leaves of regenerated plants. A newly created hybrid contained small subunits of both parents but only a N. glutinosa type large subunit. Male sterile character was conserved in a hybrid plant while leaf morphology was intermediate between the parents. By tobacco mosaic virus infection tests, the hybrid's leaves showed resistant symptoms, hypersensitive local lesions, which were due to N. glutinosa nuclear genome expression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261514
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    Paper (German National Licenses)
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