Population genetics of the common long-armed octopus Octopus minor (Sasaki, 1920) (Cephalopoda: Octopoda) in Chinese waters based on microsatellite analysis

Publication date: June 2016 Source:Biochemical Systematics and Ecology, Volume 66 Author(s): Xiaolei Gao, Xiaodong Zheng, Qikang Bo, Qi Li 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 F ST value was 0.198, indicating great genetic differentiation among populations. The F ST 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 F ST, 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 ...

Source: Biochemical Systematics and Ecology - March 28, 2016 Category: Biochemistry Source Type: research