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New data on the karyotype and chromosomal rDNA location in Paradiplozoon megan (Monogenea, Diplozoidae), gill parasite of chubs
Autoři | |
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Rok publikování | 2014 |
Druh | Článek v odborném periodiku |
Časopis / Zdroj | Parasitology Research |
Fakulta / Pracoviště MU | |
Citace | |
Doi | http://dx.doi.org/10.1007/s00436-014-4082-7 |
Obor | Genetika a molekulární biologie |
Klíčová slova | cytogenetics; chromosome; heterochromatin; secondary constriction; NOR; fluorescent in situ hybridization |
Popis | New morphological data on chromosome complement of diplozoid parasite Paradiplozoon megan from chub Sgualius cephalus are shown in the present paper. The karyotype of P. megan is characterized by seven pairs (2n = 14) of medium long (up to 11 micrometer) one-armed chromosomes which are nearly identical in number and morphological classification with chromosomes of other Paradiplozoon species described karyologically to date (P. bliccae, P. nagibinae, P. sapae, P. pavlovskii, and P. homoion). A single locus for ribosomal RNA genes, visualized in the secondary constriction site by the fluorescent in situ hybridization method, is situated interstitially on the median part of long arm of the smallest – 7th pair in P. megan. Phylogenetic interrelationship within the diplozoids and hypothesis for the ancestral karyotype is discussed here. |
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