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Sudarto Xandramaya C. Lalu Janny D. Kosen Agus H. Tjakrawidjaja Ruby Vidia Kusumah Bambang Sadhotomo Kadarusman Laurent Pouyaud Jacques Slembrouck Emmanuel Paradis 《Marine Biology》2010,157(10):2253-2262
Dating the divergence between the two known living species of coelacanths has remained a difficult issue because of the very
ancient origin of this lineage of fish, which is more closely related to tetrapods than to other fishes. We sequenced the
complete mitochondrial genome of a recently captured individual of the Indonesian coelacanth in order to solve this issue.
Using an approach based on loglinear models, we studied the molecular divergence between the two species of coelacanths and
three other pairs of species, one that has diverged recently (Pan) and two that have diverged more distantly in the past. The loglinear models showed that the divergence between the two species
of coelacanths is not significantly different from the two species of Pan. A detailed gene by gene analysis of the patterns of nucleotide and amino acid substitutions between these two pairs of species
further supports the similarity of these divergences. On the other hand, a molecular dating analysis suggested a much older
origin of the two coelacanth species (between 20 and 30 million years ago). We discuss the potential reasons for this discrepancy.
The analysis of new individuals of the Indonesian coelacanth will certainly help to solve this issue. 相似文献
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