G Karagyan

Polish Academy of Sciences, Warsaw, Masovian Voivodeship, Poland

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Publications (3)1.78 Total impact

  • [show abstract] [hide abstract]
    ABSTRACT: Cytogenetic investigations were carried out on seven species of bisexual weevils from five subfamilies. The following numbers of chromosomes were found in individual species: 2n = 22, n male = 10 + Xyp in Ptochus porcellus Boh. (Otiorhynchinae); 2n = 40, n male = 19 + Xyp in Larinodontes turbinatus Gyll. (Cleoninae); 2n = 26, n male = 12 + Xyp in Curculio pellitus (Boh.) (Curculioninae); 2n = 30, n male = 14 + Xyp in Acalles camelus (F.), Acalles echinatus (Germ.), Acalles hypocrita Boh. (Cryptorhynchinae), and 2n = 40, n male = 19 + Xyp in Cionus hortulanus (Foucr.) (Mecininae). The heterochromosomes of all the examined species form, in the first meiotic metaphase, a parachute bivalent. The chromosome number and sex determining system of six species and two genera are described for the first time.
    Folia Biologica 02/2001; 49(1-2):49-52. · 0.89 Impact Factor
  • M Holecová, M Rozek, G Karagyan
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    ABSTRACT: Karyological studies were carried out on three Armenian weevil species from the subfamily Cleoninae. The following chromosome numbers were found in individual species: 2n = 38, n Male = 18 + Xyp in Menecleonus anxius (Gyllenhal, 1824), 2n = 40, n Male = 19 + Xyp in Conorhynchus nigrivittis (Pallas, 1781) and 2n = 44, n Male = 21 + Xyp in Lixus iridis Olivier, 1807. The heterochromosomes of all the examined species form, in the first meiotic metaphase, a typical parachute bivalent.
    Folia Biologica 02/2000; 48(1-2):25-7. · 0.89 Impact Factor
  • Source
    G. H. Karagyan, D. Lachowska
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    ABSTRACT: The male karyotypes of 5 buprestid species belonging to 4 genera, 4 tribes and 3 subfamilies - Polycestinae, Chrysochroinae, Buprestinae from Armenia are described. In Acmaeodera flavolineata Laporte et Gory, 1835, Sphenoptera tamarisci beckeri Dohrn, 1866, Anthaxia olympica Kiesenwetter, 1880, A. amasina Daniel, 1903 and Chrysobothris affinis tetragramma Ménétriés, 1832 diploid chromosome numbers range between 16 and 30. Three variants of autosomal chromosome numbers (14, 18 and 28) and two types of sex chromosome systems (Xyp and neo-XY) were revealed. The available karyological data on the subfamilies Polycestinae, Chrysochroinae and Buprestinae are discussed.

Publication Stats

1 Citation
1.78 Total Impact Points

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Institutions

  • 2001
    • Polish Academy of Sciences
      • Instytut Systematyki i Ewolucji Zwierząt
      Warsaw, Masovian Voivodeship, Poland
  • 2000
    • Comenius University in Bratislava
      • Department of Zoology
      Bratislava, Bratislavsky Kraj, Slovakia