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Nuclear DNA content and karyosystematic relationships of species grouped in primitive tribes of leptodactylidae(Amphibia-Anura)

Irma Northland^I; Juana Capetillo^I; Patricia Iturra^II; Alberto Veloso^III

^IDepartamento de Biologia, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Casilla 170, Antofogasta, Chile. Send correspondence to I.N.
^IIDepartamento de Biologia Celular y Genética, Facultad de Medicina, Universidad de Chile
^IIIDepartamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile

ABSTRACT

The nuclear DNA content (DNA/N), of 12 anuran species belonging to three tribes of lower Leptodactylids is shown.
The amount of DNA/N determined by cytophotometric measurements in erythrocyte interphase nuclei ranged between 14.39 pg/N in Caudiverbera caudiverbera (2n = 26) to 5.81 pg/N in Telmatobius pefauri (2n = 26).
Intergeneric DNA/N variability is higher than intrageneric variability except in Batrachyla.
The DNA/N amount in these species is not clearly associated with diploid chromosome number variability except in the Telmatobiini, where high diploid number species (2n = 28, 30), have a larger genome size.

Keywords: Nuclear DNA; Karyosystematic relationships; Leptodactylidae; Anura.

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