ALLOZYME VARIATION IN POPULATIONS OF PLEURODEMA-THAUL (LESSON, 1826) (ANURA, LEPTODACTYLIDAE)

Genetic variation of 18 loci detected in 13 Chilean and one Argentinia n population of the toad Pleurodema thaul are described, Seven loci we re polymorphic in at least one of the studied populations, The average heterozygosity values observed for locus went from H = 0.00 for the L as Cardas population to 0.114 in the Lautaro locality, with a global a verage of 5.2%, The genetic similarity values gave an average of 0.875 (range 0.726-1.00). Accordingly, similarity values were possible to d istinguish three groups: north, central and Osorno, The Osorno populat ion differed from the central group in Est-l and Est-2, yet the Osorno population is only 20 km from a population of the central group.