Population genetic diversity and reproductive success of wild Chinese sturgeon (Acipenser sinensis) in the Yangtze River inferred from the juveniles born in 2014
- Received Date: 2019-12-20
- Accepted Date: 2020-05-06
- Rev Recd Date: 2020-04-20
- Available Online: 2020-05-21
Abstract: The Chinese sturgeon Acipenser sinensis is a large anadromous fish whose population has been seriously threatened in recent years. In this study, population genetic diversity and individual reproductive success were assessed using nuclear microsatellite markers (simple sequence repeat, SSR) and the complete mitochondrial (mtDNA) genome analysis of juveniles born in 2014. The results showed size polymorphism existed in the mtDNA genome of Chinese sturgeon, which was caused by a repeat motif. Population genetic diversity was found at a high level for both the SSR (Ho: 0.728±0.211; He: 0.779±0.122) and the mtDNA genome (H: 0.876±0.0035; Pi: 0.0011±0.0010). A positive value of the inbreeding coefficient (FIS: 0.066±0.143) was also found indicating that inbreeding had occurred. A reconstruction of sibling groups showed that there were 11 mothers and 11 fathers of Chinese sturgeons involved in reproduction in 2014. Statistical analysis indicated that the variance in individual reproductive success was not significant, and reproductive success of the parent fish was quite even (P=0.997>0.05) with Sweepstakes Reproductive Success (SRS) not occurring. These results suggested that with regard to conservation we need not worry too much about of the loss of genetic diversity due to the effects of SRS, but we must focus on having an adequate number of adults and suitable environmental conditions to ensure the fish can reproduce.
|Citation:||zhongyuan shen, Dan Yu, Xin Gao, Futie Zhang, Huanzhang Liu. Population genetic diversity and reproductive success of wild Chinese sturgeon (Acipenser sinensis) in the Yangtze River inferred from the juveniles born in 2014[J]. Zoological Research. doi: 10.24272/j.issn.2095-8137.2020.011|