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Abstract
In order to investigate the relationships of drainage history of Huaihe River with the genetic history of Carassius auratus along the river, we examined the genetic variations and population histories of three wild C. auratus populations in Huaihe River based on the D-loop gene. The results showed that their nucleotide and haplotype diversities were ranged from 0.00268 to 0.00651 and from 0.863 to 0.902, respectively, and their genetic distance was quite small. The analysis of molecular variance demonstrated that a frequent inter-population connection and large historic gene flows occurred among the three populations. Demographic analysis indicated that expansions had been happened in three populations. After investigating the historic process of the Huaihe River, we presumed that both nature and artificial factors may play important roles in shaping the genetic structure of the three populations. The present study also provided genetic information of C. auratus for further conservation of its germplasm resources.
Declaration of interest
The authors report that they have no conflicts of interest. The authors alone are responsible for the content and writing of the paper. This work was supported by grants from the National Natural Science Foundation of China (Nos. 31501845, 31172068 and 31471980), project of Chongqing Science & Technology Commission (Nos. cstc2014jcyjA80014, CSTC, and 2010CA1010), Science Research Foundation of the Education Committee of Chongqing (No. KJ1400502), and Science Founding of Chongqing Normal University (No. 14XLB006).