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Characterization of mitotic chromosomes of four species of the genus Diplodus : karyotypes and chromosomal nucleolar organizer region phenotypes
Author(s) -
Vitturi R.,
Libertini A.,
Mazzola A.,
Colomba M. S.,
Sara G.
Publication year - 1996
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1996.tb01783.x
Subject(s) - biology , diplodus , teleostei , karyotype , intraspecific competition , sparidae , genus , centromere , chromosome , zoology , interspecific competition , evolutionary biology , genetics , mediterranean climate , ecology , fish <actinopterygii> , fishery , gene
Karyotypes have been described in four Mediterranean species of the genus Diplodus (Teleostei, Sparidae), D. vulgaris, D. puntazzo, D. sargus and D. annularis . Chromosomes were mainly acrocentric in all but D. vulgaris , where certain chromosome pairs were subtelocentric. A remarkable intraspecific heteromorphism in the number of NOR‐bearing chromosomes along with a substantial interspecific variability in position of chromosomal Ag signals have been encountered. The presumed origin of multiple NOR‐bearing chromosomes in Diplodus species and variation of the NOR location is discussed.