Analysis of Genetic Diversity in Coilia nasus Based on 2b-RAD Simplified Genome Sequencing

In the protection of migratory species, Coilia nasus has always been a research topic very high interest in various countries because economic value and serious decline resources. this study, C. were collected from Shengsi Sea area, Yangtze River estuary, Taizhou section Poyang Lake. By using 2b-RAD simplified genome sequencing technology, 63,110 SNP sites screened, genetic diversity each population was analyzed with markers. The results showed that (1) purity four groups populations not high, need to further increase levels purity; (2) indicating they had strong adaptability environmental changes could easily expand their distribution resource growth; (3) FST values (0.112–0.142) higher, there moderate differentiation, but no independent formed. This study speculated these species may have same spawning grounds pointed out gene polluted, it is urgent improve nasus.