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Allozyme relationships in hypostomines (Teleostei: Loricariidae) from the Itaipu Reservoir, Upper Rio Paran� basin, Brazil
- Source :
- Genetica. 123:271-283
- Publication Year :
- 2005
- Publisher :
- Springer Science and Business Media LLC, 2005.
-
Abstract
- In an allozyme electrophoresis survey of 15 hypostomine species from the Itaipu Hydroelectric Reservoir, 25 loci from 14 enzyme systems were scored. Allozyme data allowed recording diagnostic genetic markers for all species analyzed and for some species groups within Hypostomus, a taxon which is taxonomically still unresolved in the Upper Rio Parana basin. The mean expected heterozygosity of the species was considerably variable and hypotheses to tentatively explain this variation are discussed. A cladogram based upon the allelic frequencies of the species analyzed was produced by the continuous maximum likelihood method: Rhinelepis aspera and M. parananus were separated from the species of Hypostominae by a long branch length. Pterygoplichthys anisitsi was the sister of all the representatives of the genus Hypostomus. Within Hypostomus, two main clades were produced: in the first, H. cochliodon was the sister of the species comprising the H. plecostomus group, and in the second, the tree showed the following relationships: (H. albopunctatus (H. regani + Hypostomus sp. 3) + (H. margaritifer (H. microstomus (Hypostomus sp. 1 (H. ternetzi + Hypostomus sp. 2))))). Hypostomus ternetzi and Hypostomus sp. 2 are referred to here as representatives of the H. ternetzi group.
- Subjects :
- Electrophoresis
Heterozygote
Loricariidae
Zoology
Plant Science
Biology
Species Specificity
Genetics
Animals
Hypostomus
Catfishes
Phylogeny
Teleostei
Microstomus
Ecology
Rhinelepis aspera
Genetic Variation
General Medicine
biology.organism_classification
Isoenzymes
Taxon
Cladogram
Insect Science
Animal Science and Zoology
Hypostominae
Brazil
Subjects
Details
- ISSN :
- 15736857 and 00166707
- Volume :
- 123
- Database :
- OpenAIRE
- Journal :
- Genetica
- Accession number :
- edsair.doi.dedup.....d96f245c528a15403f7b4d88ef4bb3b9