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 Meeting, Agronomy/Phytopathology, Santa Cruz do Sul, 2005, APOST 24

    Hybrid seed production in tobacco by using male sterile plants

    NIKOVA V.; NIKOLOV E.; IANCHEVA A.; PANDEVA R.; PETKOVA A.
    Institute of Genetics, Sofia, Bulgaria; Tobacco and Tobacco Products Institute, Plovdiv, Bulgaria; Reg. Ctre for Scientific Investig. & Prod. of Tobacco, Haskovo, Bulgaria.
    The introduction of hybrid crop varieties has enabled spectacular growth in productivity owing to hybrid vigor and increased uniformity. To produce hybrid seeds, a pollination control system is required to prevent unwanted self-pollination. New ...
  3. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2002, 20-4, p. 301-11., ISSN.0173-783X

    Wild Nicotiana species as a source of cytoplasmic male sterility in Nicotiana tabacum

    NIKOVA V.; VLADOVA R.
    D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria
    The results of our experiments executed to obtain tobacco male sterile lines through interspecific hybridization are summarized. Ten wild species from the genus Nicotiana: N. excelsior (exc), N. amplexicaulis (amp), N. rustica (rus), Nicotiana glauca (gla ...
  4. CORESTA Meeting, Agronomy/Phytopathology, Bucharest, 2003, APOST 11

    Nicotiana benthamiana Domin. as a source of aphid resistance in N. tabacum L

    KRUSTEVA D.; NIKOVA V.; VLADOVA R.; DIMITROV B.; PETKOVA A.; IANCHEVA A.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Tobacco aphids annually cause considerable damage to tobacco production, reducing the yield and in addition transmitting a number of viral pathogens to tobacco. The wild tobacco species N. benthamiana Domin is highly resistant to aphids. Although the ...
  5. CORESTA Meeting, Agronomy/Phytopathology, Bucharest, 2003, APOST 12

    Investigation of the interspecific hybrid Nicotiana tabacum L. x N. sanderae Hort. obtained via in vitro techniques

    NIKOVA V.; KRUSTEVA D.; DIMITROV B.; PANDEVA R.; VLADOVA R.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The cross between Nicotiana tabacum L. (line 329- oriental tobacco, Djebel type) and N. sanderae Hort. is difficult to carry out because of the existent barriers of incompatibility. When N. sanderae was used as pollinator, a small amount of underdeveloped ...
  6. Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 136, PPOST4

    Production of fertile progenies of Nicotiana sylvestris Speg. et Comes x N. tabacum L. hybrid using in vitro techniques

    NIKOVA V.; PUNDEVA R.; VLADOVA R.; IANCHEVA A.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Interspecific cross of Nicotiana sylvestris (n=12) pollinated with N. tabacum (n=24) was included in the present study. F 1 plants combined morphological features of both parents: intermediate stem and leaves, flowers with sylvestris fragrance, with ...
  7. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 150, PPOST12

    Study of Nicotiana ingulba Black. and its crossability with N. tabacum L

    NIKOVA V.; VLADOVA R.; PUNDEVA R.; PETKOVA A.; VLADOVSKA A.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Nicotiana ingulba Black. belongs to the subgenus Petunioides, sec. Suaveolens. We determined its chromosome number as 2n=20. This species was successfully crossed with N. tabacum L, cv. Plovdiv 58, used as pollinator, and formed capsules with small ...