INVESTIGADORES
MORANDO mariana
congresos y reuniones científicas
Título:
MOLECULAR EVIDENCE FOR THE HYBRID ORIGIN OF TEIUS SUQUIENSIS (SQUAMATA: TEIIDAE)
Autor/es:
AVILA, L.J.; MORANDO, M.; SITES, JR. J. W.
Lugar:
Manaus
Reunión:
Congreso; Joint Herpetological Meeting; 2003
Institución organizadora:
American Society of Ichtyologists and Herpetologists
Resumen:
Lizards of the
genus Teius are distributed in southern South America along a wide
variety of habitats, from the dry desert Monte in western Argentina to the
humid plains near Selva Paranaense in the Parana Basin. Currently only three
species have been described, T. teyou in the western Chaco and Monte, T.
oculatus in the eastern Pampas and Espinal, and the parthenogenetic T.
suquiensis distributed in the central range of both species. Several
individuals of the three species from several localities were included in a
molecular phylogenetic analysis of the origin of the parthenogenetic
populations. Two nuclear (C-MOS, Enolase intron), and one mitochondrial (ND4)
genes were used as markers, for a total of approximately 1500 bp. Fixed
differences were identified for the sexual species in both nuclear genes, and
these were always present as polymorphisms in T. suquiensis, suggesting
the hybrid origin of this species. Sequences for the mitochondrial fragment
always were identical to those from T. oculatus, indicating that a
female T. oculatus and a male of T. teyou were the parental
ancestors.