Diversidade genética de hilídeos do Brasil Central
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Data
2012-06-26
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Universidade Federal de Goiás
Resumo
The anurans are a group of vertebrates with wide geographical distribution that obtained
highly evolutionary success, being part of a lineage descendant of early tetrapods, the first
vertebrates to conquer the terrestrial environment. Anurans are divided into two suborders:
Archaeobatrachia and Neobatrachia. Within the suborder Neobatrachia there is Bufonoidea
superfamily, which includes the three families of higher abundance in the neotropical region:
Leptodactylidae, Bufonidae and Hylidae. The aim of this study was to analyze cytogenetically
species of the family Hylidae of areas of the Cerrado of Goiás, by the technique of
conventional cytogenetics and by silver nitrate staining. The metaphases were obtained
directly from cell suspensions of spleen, liver and bone marrow. The slides were stained with
Giemsa at 8%, to determine the diploid number and chromosome morphology. The species
Hypsiboas multifasciatu and Hypsiboas raniceps presented the diploid number 2n=24 and
fundamental number FN=48 with positive marks for NORs in chromosomes 8 and 10
respectively. The species Hypsiboas lundii presented diploid number 2n=24 and fundamental
number FN=46 due to the presence of acrocentric chromosome in pair 6. The RONs for this
species were identified in pericentromeric regions of short arms of chromosome 5 and in
telomeric regions of short arms of chromosome 8. Within the genus Hypsiboas, only the
species Hypsiboas albopunctatus presented diploid number 2n=22 and fundamental number
FN = 44, and by silver staining technique we identified the presence of NORs on the short
arms of the telomeric regions of chromosome pair 8. The species Pseudis bolbodactyla
presented diploid number 2n=24 and FN=46 evidenced by the acrocentric pair 4. The species
Scinax similis and Scinax constrictus showed different karyotypic notations. The species
Scinax similis presented karyotype 2n=24 and FN=48 with methacentric and submethacentric
chromosomes. We found for the species Scinax constrictus the karyotype notation 2n=22 and
FN=44. Differences in the morphology of chromosomes with respect to literature data can be
explained by the different criteria used for classification of the chromosomes. The
morphology of some of the chromosomes found in this study differs from their
representatives described in the literature, and such differences may be explained by adopting
different criteria for the classification of chromosomes.
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OLIVEIRA, Hugo Henrique Pádua de. Diversidade genética de hilídeos do Brasil Central. 2012. 72 f. Dissertação (Mestrado em Genética e Biologia Molecular) - Universidade Federal de Goiás, Goiânia, 2012.