The microevolution of the Galápagos marine iguana Amblyrhynchus cristatus assessed by nuclear and mitochondrial genetic analyses

@article{Rassmann1997TheMO,
  title={The microevolution of the Gal{\'a}pagos marine iguana Amblyrhynchus cristatus assessed by nuclear and mitochondrial genetic analyses},
  author={Kornelia Rassmann and Diethard Tautz and Fritz Trillmich and Chris Gliddon},
  journal={Molecular Ecology},
  year={1997},
  volume={6}
}
Marine iguanas may have inhabited the Galápagos archipelago and its former, now sunken islands for more than 10 million years (Myr). It is therefore surprising that morphological and immunological data indicate little evolutionary divergence within the genus. We utilized mitochondrial DNA (mtDNA) sequence analyses and nuclear DNA fingerprinting to re‐evaluate the level and pattern of genetic differentiation among 22 marine iguana populations from throughout the archipelago. Both genetic marker… 
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The hybrid status of a morphologically unusual iguana from this island is confirmed, using restriction fragment length polymorphism (RFLP) analyses of the nuclear ribosomal DNA (rDNA) of the Galapagos iguana, and it was the offspring of a female land iguana and a male marine iguana.
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TLDR
The complete mitochondrial genomes of the marine iguana Amblyrhynchus cristatus and the land iguana Conolophus subcristatus are described and a phylogeny of the Iguanidae is presented, which confirms the sister-group relationship of Galápagos iguanas.
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TLDR
Analysis of the population genetic structure of land iguanas from Santa Cruz Island to investigate the genetic implications of a semi‐captive conservation program and suggest the genetic measures that should be adopted to avoid further genetic variability depletion and preserve this vulnerable endemic species.
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A metapopulation structure with Tent extinctions and recolonisations of populations within each island is strongly suggested, and recent field observations support these findings.
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