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  1. Bull. Spec. CORESTA Congress, Vienna, 1984, p. 96, A22, ISSN.0525-6240

    New tobacco genotypes obtained through in vitro manipulation of microspores

    PATRASCU M.; IOAN E.
    Central Research Station for Tobacco Culture and Industrialization, Bucharest, Romania.
    Genotypes with new genetic combinations were obtained by using "in vitro"cultures of microspores derived from inter- and intraspecific hybrids in F1 and F2. Dihaploid isogenic lines with superior production and quality characteristics are used as...
  2. Bull. Spec. CORESTA Symposium, Winston-Salem, 1982, p. 79, AP3, ISSN.0525-6240

    Dihaploid-type isogenous Lines and their use in tobacco quality improvement

    PATRASCU M.; EUGEN I.; DECULESCU G.
    Central Research Station for Tobacco Culture and Industrialization, Bucharest, Romania.
    Isogenous lines were obtained by doubling the chromosomal set of androgenetic haploids achieved byïn vitro"anther culture derived from inter- and intraspecific Nicotiana hybrids that were in the F1-F4 generation. Dihaploid genomes that include...
  3. Bull. Spec. CORESTA Congress, Manila, 1980, p. 103, AP09, ISSN.0525-6240

    Investigations relative to the preservation of the genetical information in an isogenetic line obtained from a tobacco androgenetic haploid and its cytogenetics

    PATRASCU M.
    Central Research Station for Tobacco Culture and Industrialization, Bucharest, Romania.
    Cytogenetic investigations were carried out on a tobacco isogenetic line (Molotava 72 x Nicotiana glauca F5) x Ghimpati RP 55 F3, obtained from an androgenetic haploid and compared with the hybrid from which were derived the haploid and the parents...
  4. Bull. Spec. CORESTA Congress, Manila, 1980, p. 104, AP10, ISSN.0525-6240

    Induction of haploids by direct and indirect androgenesis on interspecies hybrids of Nicotiana

    RAICU P.; BADEA E.; GREGORIAN L.; IOAN E.
    University of Bucharest, Romania Institute of Biological Sciences, Bucharest, Romania Institute of Tobacco, Baneasa, Bucharest, Romania
    The authors made tests on interspecific hybrids of different generations belonging to the species Nicotiana tabacum, N. glauca and N. glutinosa. The anthers were cultivated on modified Nitsch medium. The frequency of anthers that germinated varied...