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13 results

  1. CORESTA Congress, Paris, 2006, APOST 01

    Fertilizer N, topping height and cultivar effects on yield, grade index and chemical composition of flue-cured tobacco in Ontario

    AMANKWA G.A.; HAJI H.M.; WHITE A.D.; VAN HOOREN D.L.
    Canadian Tobacco Research Foundation, Delhi, Ontario, Canada.
    The objective of this field study was to determine whether current topping and N fertilizer practices are optimum for yield, grade index, and chemical quality for flue-cured tobacco production in Ontario, Canada. The study was conducted at Delhi,...
  2. 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...
  3. 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...
  4. 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....
  5. 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...
  6. 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...
  7. 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...