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      https://www.ias.ac.in/article/fulltext/jbsc/032/04/0763-0768

    • Keywords

       

      Sex chromosome differentiation; inversion heteromorphism; green toads; Bufo viridis complex; Anura

    • Abstract

       

      A chromosome study was carried out on a number of European and Central Asiatic diploid green toad populations by means of standard and various other chromosome banding and staining methods (Ag-NOR-, Q-, CMA3-, late replicating [LR] banding pattern, C- and sequential C-banding + CMA3 + DAPI). This study revealed the remarkable karyological uniformity of specimens from all populations, with the only exception being specimens from a Moldavian population, where one chromosome pair was heteromorphic. Though similar in shape, size and with an identical heterochromatin distribution, the difference in the heteromorphic pair was due to a large inverted segment on its long arms. This heteromorphism was restricted to females, suggesting a female heterogametic sex chromosome system of ZZ/ZW type at a very early step of differentiation.

    • Author Affiliations

       

      G Odierna1 G Aprea1 T Capriglione2 S Castellano3 E Balletto3

      1. Dipartimento di Biologia Strutturale e Funzionale, Università di Napoli Federico II, Via Cinthia 6, 80126 Naples, Italy
      2. Dipartimento di Scienze Biologiche, Università di Napoli Federico II, Via Mezzocannone 8, 80134 Naples, Italy
      3. Dipartimento di Biologia Animale e dell'Uomo, Università di Torino, Via Accademia Albertina 13, 10123 Turin, Italy
    • Dates

       
  • Journal of Biosciences | News

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