Population genetics of the common long-armed octopus Octopus minor (Sasaki, 1920) (Cephalopoda: Octopoda) in Chinese waters based on microsatellite analysis |
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| Institution: | 1. Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China;2. Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China;3. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;2. Institut de Ciències del Mar (CSIC), Barcelona, Spain;3. CCMAR-CIMAR L.A., Centro de Ciencias do Mar do Algarve, Campus de Gambelas, Universidade doAlgarve, Faro, Portugal;4. International Fisheries Science Unit, Graduate School of Agricultural Sciences, Tohoku University, Sendai, Japan;5. Oceanographic Center of Vigo. Spanish Institute of Oceanography, Subida a Radio Faro, Pontevedra, Spain;11. Monterey Bay Aquarium, Monterey, California, USA;12. Department of Organismal Biology and Anatomy, University of Chicago, Chicago, Illinois, USA;8. Molecular Genetics Unit, Okinawa Institute of Science and Technology, Okinawa, Japan;9. Laboratório Sanidade de Organismos Aquáticos. Universidade Federal de Santa Catarina, Florianopolis, Brazil;1. First Institute of Oceanography, SOA, Qingdao 266061, PR China;2. College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, PR China;3. Marine College of Shandong University, Weihai 264209, PR China |
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| Abstract: | Octopus minor (Sasaki, 1920) is a commercially important cephalopod in Chinese waters. To provide a theoretical basis for resource protection and sustainable management, we investigated genetic structure of ten O. minor populations in Chinese waters using microsatellite DNA markers. Eight microsatellite loci revealed high allelic diversity with 11–26 alleles per locus. Observed and expected heterozygosity varied from 0.412 to 0.900 and from 0.337 to 0.845, respectively. The overall FST value was 0.198, indicating great genetic differentiation among populations. The FST value between Yilan and other populations reached more than 0.3 that may be indicative of subspecies rank. Mantel test showed significant correlations between genetic and geographic distance (R = 0.383, P = 0.004) indicating that genetic differentiation of O. minor conformed to a pattern of isolation-by-distance. Using the Neighbor-joining method, cluster analysis divided nine populations into three groups and divided ten populations into two groups wherein Yilan was distinguished from the other populations. Analysis based on FST, Dc values and clustering highlighted the heterogeneity of Yilan and the relative homogeneity between Yilan and Ganyu. The significant population genetic structure of O. minor is related to the combined effects of geographical barriers, current features and life history characteristics. |
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| Keywords: | Microsatellite DNA Population genetic structure Current |
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