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Natural interspecific hybridization in Odontophrynus (Anura: Cycloramphidae)

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The frog genus Odontophrynus is a composite of diploid and tetraploid populations and species that are widely distributed in South America. Some of the several genetic studies on this group report the production of artificial hybrids but only a single case of natural hybridization has been documented, in southern Brazil. In this study we report the finding of an interspecific natural hybrid specimen in central Argentina. We present morphological and cytogenetical evidence that the diploid taxa Odontophrynus cordobae and O. occidentalis are the parental species. The hybrid genome exhibited problematic pairing and segregation of homeologue chromosomes during meiosis, and the production of non-reduced gametes.

Affiliations: 1: Laboratorio de Genética Evolutiva, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552 (3300), Posadas, Misiones, Argentina, División de Herpetología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Ángel Gallardo 470 (1405), Buenos Aires, Argentina;, Email: mopereyra@gmail.com; 2: Laboratorio de Genética Evolutiva, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552 (3300), Posadas, Misiones, Argentina, CONICET; 3: Centro de Zoología Aplicada, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Rondeau 798, Casilla de Correo 122 (5000), Córdoba, Argentina, CONICET; 4: Sección Herpetología, Museo de La Plata, Universidad Nacional de La Plata, Paseo del Bosque S/Noº, (1900) La Plata, Buenos Aires, Argentina; 5: Laboratorio de Genética Evolutiva, Facultad de Ciencias Exactas, Químicas y Naturales, Universidad Nacional de Misiones, Félix de Azara 1552 (3300), Posadas, Misiones, Argentina, Instituto de Herpetología, Fundación Miguel Lillo, Miguel Lillo 251 (4000), San Miguel de Tucumán, Tucumán, Argentina

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/content/journals/10.1163/156853809789647149
2009-10-01
2016-12-04

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