Molecular cytogenetic study of three common Mediterranean limpets, Patella caerulea, P. rustica and P. ulyssiponensis (Archaeogastropoda, Mollusca) |
| |
Authors: | Agnese Petraccioli Fabio Maria Guarino Nicola Maio and Gaetano Odierna |
| |
Institution: | (1) Dipartimento di Biologia Strutturale e Funzionale, Universit? di Napoli Federico II, Via Cinthia, 80126 Naples, Italy;(2) Museo Zoologico Centro Museale, Universit? di Napoli Federico II, Via Mezzocannone 8, 80134 Naples, Italy; |
| |
Abstract: | The present paper shows the results of chromosome banding and rDNA-FISH study performed on several specimens of different
populations of Patella caerulea, Patella
rustica and Patella
ulyssiponensis. The taxonomic attribution of specimens was ascertained by the molecular phylogenetic analysis of the mitochondrial 16S rRNA
gene. P. caerulea and P. rustica had 2n = 18 chromosomes with first seven of biarmed pairs and the remaining two uniarmed pairs. P. ulyssiponensis had 2n = 16 with all biarmed chromosomes. Ag-NOR loci were on the short arms of the first metacentric pair in the three studied
limpets, whereas they showed a different pattern of heterochromatin distribution and composition. A chromosome mosaicism was
observed in several P. caerulea specimens, which exhibited an unpaired metacentric element and loss of a telocentric pair. The obtained results suggest that
in the genus Patella specific diversification was accompanied by variations in heterochromatin distribution and composition and reduction of chromosome
number by Robertsonian centric fusion. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|