Abstract
We revealed the range and current status of genetic disturbances in wild medaka populations (Oryzias latipes species complex) using two DNA markers (cytb gene and b-marker). Genetic disturbances were detected in many wild populations throughout Japan and were primarily caused by artificial introduction of the commercial medaka variety, himedaka. We identified native medaka populations without introgressions, which may be significant conservation targets. To conserve the native genetic diversity of the medaka species complex, further introduction of himedaka should be prevented by educating the public about the current status and risks of introducing non-native medaka varieties into the wild.
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Acknowledgments
We thank M. Kobayashi (ICU), Y. Kano (DSKU), M. Fukui (KESC), T. Hagiwara (GEF), and many others for helping with specimen collection. We are grateful to K. Hosoya, Y. Kubo, and other members of the Aquatic Ecology Laboratory of KUN for their useful advice and help with specimen sampling and fieldwork. This study was partially funded by a research grant from the Kinki University in 2010 (Subject number: SR14). This study complies with the current laws of Japan.
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Nakao, R., Iguchi, Y., Koyama, N. et al. Current status of genetic disturbances in wild medaka populations (Oryzias latipes species complex) in Japan. Ichthyol Res 64, 116–119 (2017). https://doi.org/10.1007/s10228-016-0528-5
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DOI: https://doi.org/10.1007/s10228-016-0528-5