Abstract：
:There has been considerable discussion in recent years on the evolution of the tandemly repeated multigene families, since some organisms show a concerted model whereas others show a birth-and-death model. This controversial subject extends to several species of fish. In this study, three species of the Sparidae family (Pagrus pagrus, P. auriga and Diplodus sargus) and an interspecific hybrid (P. pagrus (♀) × P. auriga (♂)) have been studied at both molecular and cytogenetic level, taking three different multigene families (5S rDNA, 45S rDNA and U2 snDNA). Results obtained with the 5S rDNA in P. pagrus and P. auriga are characterized by a considerable degree of conservation at the two levels; however, an extraordinary variation was observed in D. sargus at the two levels, which has never been found in other fishes studied to date. As a consequence of this, the evolutionary model of the multigene families is discussed considering the results obtained and others from the bibliography. The result obtained in the hybrid allowed the recombination frequency in each multigene family to be estimated.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
Merlo MA,Cross I,Manchado M,Cárdenas S,Rebordinos Ldoi
10.1007/s00239-013-9541-8subject
Has Abstractpub_date
2013-03-01 00:00:00pages
83-97issue
3eissn
0022-2844issn
1432-1432journal_volume
76pub_type
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