Analysis of Genetic Diversity and Population Structure of Three Wild Urechis unicinctus Populations Based on GBS Sequencing
[Objective]The purpose of this study was to evaluate the genetic diversity and population structure of wild Urechis uniconctus populations in China.[Method]Three population samples were col-lected from Dalian,Tangshan,and Yantai,and SNP marker site information was obtained by using GBS sequencing technology.The expected heterozygosity,observed heterozygosity,nucleotide diversity,mo-lecular variance,clustering,and population structure were analyzed.[Result]The observed heterozy-gosity of three wild populations of Urechis uniconctus was 0.212-0.223.The expected heterozygosity was 0.239-0.257.The diversity of nucleotides ranged from 0.252 to 0.271.Genetic variation was mainly de-rived from the population of Urechis uniconctus.Three wild populations can be divided into two genetic populations,but the samples did not show a clear population structure based on geographical location.[Conclusion]The wild Urechis uniconctus in China has middle genetic diversity.
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