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Structural chromosomal alterations in Hyla albopunctata and Aplastodiscus perviridis (Anura, Hylidae) from the Morro do Ferro region of Minas Gerais

Vera Lucia C. Feitosa^I; Shirlei M. Recco-Pimentel^I; Adão J. Cardoso^I

^IDepartamento de Biologia Celular, Instituto de Biologia, Universidade Estadual de Campinas, UNICAMP, 13083-970 Campinas, SP, Brasil. Send correspondence to S.M.R.-P.
^IIDepartamento de Zoologia, Instituto de Biologia, UNICAMP, 13083-970 Campinas, SP, Brasil

ABSTRACT

Metaphase chromosomes were analyzed in Aplastodiscus perviridis from the locations: Morro do Ferro (MG), Serra da Bocaina (SP), Botucatu (SP), and in Hyla albopunctata found at: Morro do Ferro, Botucatu, and Campinas (SP). A significant quantity of metaphases with structural alterations were found in the Morro do Ferro population. These alterations were classified as: decondensation, condensation, breaks, gaps, deletions and acentric fragments. Breaks, deletions and fragments were the most frequent alterations and a great number of these occurred near centromeric heterochromatin. The frequency of altered metaphases varied among individuals in all populations studied. The majority of the alterations can probably be attributed to the high level of natural radiation at Morro do Ferro.

Keywords: Structural chromosomal; Hyla albopunctata; Aplastodiscus perviridis.

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