Diploid-tetraploid relationship among old-world members of the fish family Cyprinidae

@article{Ohno2004DiploidtetraploidRA,
  title={Diploid-tetraploid relationship among old-world members of the fish family Cyprinidae},
  author={Susumu Ohno and Jun-ichi Muramoto and Lawrence C. Christian and Niels B. Atkin},
  journal={Chromosoma},
  year={2004},
  volume={23},
  pages={1-9}
}
Evidence suggesting that the goldfish and the carp of the family Cyprinidae are tetraploid species in relation to other members of the same family were presented. The two barb species, Barbus tetrazona and Barbus jasciatus, were chosen as representatives of diploid members of the family Cyprinidae. These barbs had the diploid chromosome number of 50 and 52 and the DNA value 20–22% that of placental mammals, while the goldfish (Carassius auratus) and the carp (Cyprinus carpio) had the diploid… 
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CYTOGENETIC STUDIES IN KARYOTYPE AND DNA OF JAPANESE LOWER VERTEBRATES. X. STUDIES IN 15 SPECIES CYPRINIDAE
TLDR
The present study was undertaken with a hope to obtain any critical information for understanding some evolutional relationship in the Cyprinidae of Japan.
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