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8 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. 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 ...
  3. 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 ...
  4. 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 ...
  5. 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 ...
  6. 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 ...
  7. Bull. Spec. CORESTA Congress, Harare 1994, p. 142, PPOST 15

    Investigation of cytoplasmic-nuclear interactions and manifestation of cytoplasmic male sterility in tobacco

    NIKOVA V.; VLADOVA R.; PANDEVA R.; SHABANOV D.; NIKOLOV E.; KANEVA S.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Cytoplasmic male sterility (CMS) is defined as the inability to produce functional pollen with preservation of normal female fertility. CMS in tobacco is caused by a combined action of nuclear genes and extrachromosomal factors and is an useful tool for ...