Multiple Chromosome Polymorphism in Gobius paganellus (Teleostei, Perciformes)

Abstract

Chromosome preparations from 46 specimens of C. paganellus were studied, revealing seven different karyomorphs: D2 (2n =46, NF46), D1 (2n =47, NF=47), B (2n =48, NF=48), F1 (2n =47, NF=48), F2 (2n =46, NF=48), D1F1 (2n =46, NF = 47), I (2n = 48, NF = 49). It is proposed that the mechanisms involved are deletions, fusions and inversions. The meiotic results suggest that the same chromosome pair was engaged in both the fusion and the deletion rearrangements. Intra-individual polymorphism was found in only one specimen. This and the range of karyomorphs suggest that this variation is regularly inherited.

Karyotype Divergence and Spreading of 5S rDNA Sequences between Genomes of Two Species: Darter and Emerald Gobies (<b><i>Ctenogobius</i></b>, Gobiidae)

“…Galvão et al, 2011], in contrast to the conserved pattern displayed by several other perciform groups [Molina, 2007]. Evidence of this evolutionary dynamism is supported by a high degree of polymorphism caused by Robertsonian translocations, tandem fusions and pericentric inversions Thode et al, 1985;Amores et al, 1990;Caputo et al, 1999;Ene, 2003], demonstrating different processes involved in the origin of the diverging karyotypes.…”

Robertsonian rearrangements in the reef fish Chromis (Perciformes, Pomacentridae) involving chromosomes bearing 5s rRNA genes

“…Robertsonian polymorphisms are important sources of karyotype diversification in several Perciformes groups, including the Pomacentridae (Ojima and Kashiwagi, 1981), Gobiidae (Thode et al, 1985;Vitturi and Catalano, 1989;Amores et al, 1990;Caputo et al, 1997) and Cichlidae (Martins et al, 1995).…”

Chromosome polymorphism of stargazer Uranoscopis scaber (Uranoscopidae, Perciformes) from the Black Sea

“…In C. aper, three karyomorphs with 2n = 46, 44, and 42 and NF = 50 were found; their origin is related to Rob ertsonian fusions (Vitturi and Lafargue, 1992). In G. paganellus, four karyomorphs with 2n = 45, 46, 47, and 48 and NF = 47 and 48 were found, which is related to pericentric inversions and Robertsonian translocations (Vitturi et al, 1984;Thode et al, 1985). In G. fallax, 2n varies from 43 to 38 (Thode et al, 1988), that in G. niger varies from 32 to 34 (Vitturi and Catalano, 1989), and that in Aphia minuta varies from 41 to 44 (NF = 44) (Caputo et al, 1999).…”