Cytochrome b sequences reveal Acomys minous (Rodentia, Muridae) paraphyly and answer the question about the ancestral karyotype of Acomys dimidiatus
| Autor: | Jean Claude Gautun, Petros Lymberakis, Pierre Olivier Barome, M. Monnerot |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Paraphyly
Mitochondrial DNA biology Cytochrome b Molecular Sequence Data Zoology Karyotype Sequence Analysis DNA biology.organism_classification Cytochrome b Group Biological Evolution humanities Chromosomes Acomys minous Evolution Molecular Muridae Minous Spiny mouse Phylogenetics Karyotyping Genetics Animals Molecular Biology Ecology Evolution Behavior and Systematics Phylogeny |
| Zdroj: | Molecular phylogenetics and evolution. 18(1) |
| ISSN: | 1055-7903 |
| Popis: | Sequences of the cytochrome b (cyt b ) mitochondrial gene show that the spiny mouse Acomys from Crete, known as the endemic species A. minous, is composed of two distinct maternal lineages (“A” and “B”). Group “A” sequences cluster with A. nesiotes (Cyprus) and group “B” sequences cluster with A. cilicicus (Turkey), which is evidence of paraphyly of A. minous in regard to these two species. From cyt b sequences, the three taxa are very closely related to A. cahirinus (Egypt): the maximum divergence found among these sequences is 1.6%, which is equivalent to the intraspecific diversity observed in other Acomys species. Paleozoology evidenced that man unintentionally introduced Acomys into Crete and Cyprus during antiquity. The divergence time between Acomys cyt b sequences found in Crete was estimated at 0.4 Myr, which means that the diversity observed did not appear after the introduction but reflects a much more ancient polymorphism. Cytochrome b phylogeny and cytogenetic data together comprise evidence that, within the species A. dimidiatus (Saudi Arabia, Israel, Egypt), it is the karyotypic form with 36 chromosomes that derives from the form with 38 chromosomes, due to a single acrocentric fusion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect