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10 results

  1. CORESTA Congress, Paris, 2006, APOST 07

    Genetic improvement of Nicotiana tabacum by applying remote hybridization and biotechnological methods

    NIKOVA V.; IANCHEVA A.M.; VLADOVA R.; PANDEVA R.; PETKOVA A.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Wild Nicotiana species possess a high potential of useful features. Interspecific hybridization is a very effective method for the introducing of desired characters into tobacco and achieving crop improvement. Its successful realization is limited due to ...
  2. CORESTA Congress, Paris, 2006, APOST 24

    Color and aroma of tobacco: a facilitated approach for their objective evaluation in Oriental tobaccos and for cultivar classification within Virginia and Oriental tobacco types

    DAGNON S.; EDREVA A.; VLADOVSKA A.
    Tobacco and Tobacco Products Institutes, Plovdiv, Bulgaria; D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria.
    In the routine practice the evaluation of colour and smoke aroma, major qualitative characteristics of tobacco, is mainly based on organoleptic estimates by expert panels, with this suffering from subjectivity, high costs and health hazards. We propose a ...
  3. Bull. Spec. CORESTA Symposium, Kallithea, 1990, P. 142, 142, ISSN.0525-6240

    Transfer of cytoplasmic male sterility to Nicotiana tabacum L. by protoplast fusion

    NIKOVA V.; MENCZEL I.
    Institute of Genetics, Sofia, Bulgaria. Institute of Plant Physiology. Szeged. Hungary.
    Protoplast fusion was used for producing cytoplasmic male sterile (CMS) tobaccos within a shorter period of time (one year) than the conventional backcross method, for which several years are required. Mesophyl protoplasts of CMS line (N. tabacum cv. ...
  4. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 141, A32, ISSN.0525-6240

    Study of cytoplasmic sterile male hybrids (CMS)-cytoplasm derived from Nicotiana goodspeedii

    PALAKARTCHEVA M.; YANTCHEVA A.; DELON R.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria; Institut de Tabac de Bergerac, France
    The aim of our research was the creation of cytoplasmic male hybrids (cytoplasm derived from N. goodspeedii. Sterile male lines with) sterile male cytoplasm from N. goodspeedii were used on the one hand on the other, the French varieties BB30 and PBD6, ...
  5. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 147, A38, ISSN.0525-6240

    Inheritance of the nicotine content in some oriental tobacco cultivars

    STOYANOVA M.; MOLLE E.
    Institute of Genetics, Bulgarian Academy of Science, Sofia, Bulgaria; Faculty of Biology, Kliment Ohridski University, Sofia, Bulgaria.
    The inheritance of nicotine content was investigated by the method of Mather and Jinks (1977), using 3 diallelic crosses of 13 oriental tobacco cultivars. The nicotine content was determined in sun-cured leaves by the Standard Coresta method 2 (1966). The ...
  6. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 168, P11, ISSN.0525-6240

    Involvement of free radicals and superoxide dismutase in the blue mold resistance of tobacco

    EDREVA A.; KARJIEVA R.; COUSSIRAT J.C.; DELON R.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The concentratio of free unpaired electrons (corresponding to the free radicals level) was investigated in tobacco seedlings during blue mold pathogenesis. The method of electron paramagnetic (spin) resonance was applied. The activity of the superoxide ...
  7. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 170, P13, ISSN.0525-6240

    Genetic study of the PMR Burley 21 variety with regard to its resistance to Erysiphe cichoracearum DC

    TOUNKARA F.; PALAKARTCHEVA M.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The aim of our study was to investigate the genetic control of the resistance to powdery mildew, of the tobacco cultivar BMR Burley 21, resistance derived from Nicotiana tabacum. The resistance was estimated under normal full field cultivation conditions ...
  8. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 175, P18, ISSN.0525-6240

    Isogenic lines of the tobacco cultivar Harmanliska basma 163 possessing the Nt gene controlling resistance to the tobacco mosaic virus (TMV) strain of the Tomato/Nicotiana virus I Smith

    PALAKARTCHEVA M.; KRESTEVA D.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The aim of our studies was to create isogenic lines of the Harmanliska basma 163 cultivar, possessing the Nt gene which controls the resistance of tobacco to Nicotiana virus I Smith. Simultaneously with this investigation, we also studied the influence of ...
  9. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 183, PP01, ISSN.0525-6240

    Biochemical study of tobacco tested under"test-cotyledon"conditions : Effects of magnesium, reactions of plants resistant and sensitive to Peronospora tabacina. Cytochemical study of Callose

    GEORGIEVA I.D.; DELON R.; COUSSIRAT J.C.; EDREVA A.M.
    Institute of Genetics, Sofia, Bulgaria; Institut Expérimental du Tabac, Bergerac, France
    Tobacco obtained under cotyledon test conditions was inoculated with P. tabacina Adam conidia. The presence of callose deposits was detected in the cell walls of three genotypes. In the sensitive type, there was no formation of callose papillae in young ...