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Titolo:
Phylogeny and biogeographic history of hake (genus Merluccius), inferred from mitochondrial DNA control-region sequences
Autore:
Quinteiro, J; Vidal, R; Rey-Mendez, M;
Indirizzi:
Univ Santiago Compostela, Fac Biol, Dept Bioquim & Biol Mol, E-15706 Santiago, Spain Univ Santiago Compostela Santiago Spain E-15706 E-15706 Santiago, Spain
Titolo Testata:
MARINE BIOLOGY
fascicolo: 1, volume: 136, anno: 2000,
pagine: 163 - 174
SICI:
0025-3162(200002)136:1<163:PABHOH>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CYTOCHROME-B GENE; POLYMERASE CHAIN-REACTION; SOUTHERN AFRICAN HAKES; NUCLEOTIDE SUBSTITUTIONS; EVOLUTIONARY DIVERGENCE; FISHES; TREES; RELIABILITY; TRANSITIONS; SYSTEMATICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
79
Recensione:
Indirizzi per estratti:
Indirizzo: Rey-Mendez, M Univ Santiago Compostela, Fac Biol, Dept Bioquim & Biol Mol,E-15706 Santiago, Spain Univ Santiago Compostela Santiago Spain E-15706 ago, Spain
Citazione:
J. Quinteiro et al., "Phylogeny and biogeographic history of hake (genus Merluccius), inferred from mitochondrial DNA control-region sequences", MARINE BIOL, 136(1), 2000, pp. 163-174

Abstract

Phylogenetic analyses of the left domain of the mitochondrial DNA control-region sequence have been used to examine the relationships among species of the genus Merluccius (Rafinesque, 1810), and to compare these with hypotheses based on morphological, meristic and allozyme characters. Analysis of aligned sequences revealed that transition bias was much lower than in mammalian mtDNA, and that nucleotide composition of control-region sequences was biased toward A and T. We have roughly calibrated a molecular clock for the genus, based on the rise of the Isthmus of Panama, which is believed to have created a barrier to dispersal between marine species of the Atlantic and Pacific Oceans. Our mtDNA-based phylogeny was highly congruent with allozyme-based phylogenies, but poorly so with a previously described phylogeny based on morphology. Specifically, our phylogeny resolved two well-supported principal clades, one of American (west Atlantic and east Pacific) species and the other of Euro-African least Atlantic) species. This suggests anevolutionary history during which the ancestral lineage of Merluccius was divided between two geographic regions, with subsequent dispersal and vicariant events resulting in the evolution and distribution of extant taxa. However, the relationships between some taxa within the American clade could not be resolved. We suggest that this is consistent with an hypothesis of a rapid origin and radiation of these taxa.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 02:22:46