The ZZ/ZW sex-determining mechanism originated twice and independently during evolution of the frog, Rana rugosa

@article{Ogata2008TheZS,
  title={The ZZ/ZW sex-determining mechanism originated twice and independently during evolution of the frog, Rana rugosa},
  author={Mitsuaki Ogata and Yoshikazu Hasegawa and Hiromi Ohtani and M Mineyama and Ikuo Miura},
  journal={Heredity},
  year={2008},
  volume={100},
  pages={92-99}
}
The Japanese frog, Rana rugosa, has two distinct sex chromosome types, XX/XY and ZZ/ZW. These two types are found in localized groups, separated geographically by a boundary area predicted to lie somewhere around Lake Biwa in central Japan. To determine this precise boundary, the heterogametic sex of 18 populations around Lake Biwa was examined by genotyping sex-linked genes. Phylogenetic relationships between the populations were also analyzed using mitochondrial 12S rRNA gene. Results showed… CONTINUE READING

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