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  1. Bull. Spec. CORESTA Congress, Harare 1994, p. 133, PPOST 5

    Induction of contact recognition as related to host-induced resistance in tobacco brown spot

    DONG H.; LIU A.; ZHANG C.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    Tobacco leaf surfaces which had been pretreated with non-pathogenic bacteria, viruses, and hypovirulent strains of brown spot pathogen (Alternaria alternata), or a virulent strain of A. alternata showed seven types of abnormal pre-infection behavior: (1) ...
  2. Bull. Spec. CORESTA Congress, Harare 1994, p. 134, PPOST 6

    A preparation SRS2 based on induced resistance: its functions of controlling brown spot and improving economic and qualitative properties of tobacco

    DONG H.; LIU A.; ZHANG C.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    SRS2, a preparation for resistance induction in tobacco, was made from cell wall components of Alternaria alternata spores and combined with the chemical ID1 as a resistance inducer. In greenhouse experiments, SRS2 induced over 50% resistance and nearly ...
  3. Bull. Spec. CORESTA Congress, Harare 1994, p. 138, PPOST 11

    Overcoming the non-crossability between N. rustica var. Brasilia L. and N. tabacum - creation of wild fire resistant F1 hybrids

    KRUSTEVA D.
    D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria
    The purpose of the present investigation is the overcoming of the non-crossability between species N. rustica var. Brasilia (2n = 48) and N. tabacum (2n = 48) to create of wild fire resistant tobacco hybrids and lines. The initial material used for ...
  4. 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 ...
  5. Bull. Spec. CORESTA Congress, Harare 1994, p. 77, APOST 18

    Establishment of glyphosate-resistant tobacco cultivars via in vitro techniques

    NEDKOVSKA M.; NIKOVA V.; TINEVA N.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The objectives of this study were the selection of herbicide resistant variant of important Bulgarian tobacco cultivars from callus cultures, evaluation of the expression of this resistance in tobacco regenerants, their seed progenies by cytological and ...
  6. Ann. Tabac, 1991, Sect. 2-23, p. 75-9., ISSN.0399-0354

    Isogenic lines of Harmanliska Basma 163 tobacco having a Nt gene controlling the resistance vis-à-vis the virus of tobacco mosaic (TMV) tomato strain (Nicotiana Virus I Smith)

    PALAKARTCHEVA D.; KRUSTEVA D.
    Institut of Genetics - Plant Breeding, Sofia, Bulgaria.
    The aim of this research is to create isogenic lines of the variety Harmanliska basma 163, with a Nt gene controlling the resistance of tobacco to Nicotiana virus I Smith. At the same time a study of the comportment of the Nt gene, as well as those which ...
  7. Ann. Tabac, 1991, Sect. 2-23, p. 81-7., ISSN.0399-0354

    Genetic study of Erysiphe cichoracearum D.C. resistance of PMR Burley 21 cultivar and some morphological characters that influence the tobacco yield

    TOUNKARA F.; PALAKARCHEVA M.
    Institut of Genetics - Plant Breeding, Sofia, Bulgaria.
    The aim of the present investigation is to study the genetic control of Erysiphe cichoracearum resistance of PMR Burley 21 cultivar, coming from N. tabacum. At the same time the inheritance of some quantitative characters was studied, that influence the ...