Construction of a high-density linkage map and detection of sex-specific markers in Penaeus japonicus

文献类型： 外文期刊

第一作者： Zhang, Yaqun

作者： Zhang, Yaqun;Yao, Na;Li, Hengde;Zhang, Chuantao;Huang, Jingxian;Sun, Xiangshan;Zhao, Bingran

作者机构：

关键词： Linkage map; Sex-specific markers; Penaeus japonicus; Genotyping-by-sequencing

期刊名称：PEERJ （ 影响因子：2.984； 五年影响因子：3.369 ）

ISSN： 2167-8359

年卷期： 2021 年 9 卷

页码：

收录情况： SCI

摘要： Penaeus japonicus is one of the most important farmed shrimp species in many countries. Sexual dimorphism is observed in P. japonicus, in which females grow faster and larger than males; therefore, a unisexual female culture of P. japonicus could improve the efficiency of productivity. However, the genetic mechanisms underlying sex determination in P. japonicus are unclear. In this study, we constructed a high-density genetic linkage map of P. japonicus using genotyping-bysequencing (GBS) technology in a full-sib family. The final map was 3,481.98 cM in length and contained 29,757 single nucleotide polymorphisms (SNPs). These SNPs were distributed on 41 sex-averaged linkage groups, with an average inter-marker distance of 0.123 cM. One haplotype, harboring five sex-specific SNPs, was detected in linkage group 1 (LG1), and its corresponding confidence interval ranged from 211.840 to 212.592 cM. Therefore, this high-density genetic linkage map will be informative for genome assembly and marker-assisted breeding, and the sex-linked SNPs will be helpful for further studies on molecular mechanisms of sex determination and unisexual culture of P. japonicus in the future.

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