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  1. 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 ...
  2. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 151, PPOST13

    Inheritance of the resistance to wildfire in Oriental and Virginia tobacco cultivars and lines

    KRUSTEVA D.; DIMITROV B.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The wildfire (Pseudomonas syringae p.v. tabaci) is widely spread in Bulgaria. This disease causes severe injuries to tobacco plants. It kills the seedlings, reduces the yield and the quality of the cured leaves. Therefore, it is economically the most ...
  3. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 152, PPOST14

    Resistance of tobacco to tobacco aphids (Myzus nicotianae Blackman) originating from N. gossei

    DIMITROV B.; KRUSTEVA D.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The tobacco aphids (Myzus nicotianae Blackman) are important pests of the tobacco crop in Bulgaria. Besides the reduction of tobacco yield and quality they transfer many virus diseases. The wild species N. gossei is used in tobacco immunobreeding as a ...