Genome-wide SNP identification for the construction of a high-resolution genetic map of Japanese flounder (Paralichthys olivaceus): applications to QTL mapping of Vibrio anguillarum disease resistance and comparative genomic analysis
文献类型: 外文期刊
第一作者: Shao, Changwei
作者: Shao, Changwei;Liu, Yang;Wang, Lei;Tian, Yongsheng;Chen, Songlin;Shao, Changwei;Liu, Yang;Wang, Lei;Tian, Yongsheng;Chen, Songlin;Shao, Changwei;Sakamoto, Takashi;Niu, Yongchao;Xie, Zhiyuan;Tai, Shuaishuai;Rastas, Pasi;Li, Hengde;Jiang, Yong
作者机构:
关键词: Japanese flounder;RAD-seq-based SNP;high-resolution linkage map;QTL mapping;genome synteny
期刊名称:DNA RESEARCH ( 影响因子:4.458; 五年影响因子:5.371 )
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收录情况: SCI
摘要: High-resolution genetic maps are essential for fine mapping of complex traits, genome assembly, and comparative genomic analysis. Single-nucleotide polymorphisms (SNPs) are the primary molecular markers used for genetic map construction. In this study, we identified 13,362 SNPs evenly distributed across the Japanese flounder (Paralichthys olivaceus) genome. Of these SNPs, 12,712 high-confidence SNPs were subjected to high-throughput genotyping and assigned to 24 consensus linkage groups (LGs). The total length of the genetic linkage map was 3,497.29 cM with an average distance of 0.47 cM between loci, thereby representing the densest genetic map currently reported for Japanese flounder. Nine positive quantitative trait loci (QTLs) forming two main clusters for Vibrio anguillarum disease resistance were detected. All QTLs could explain 5.1-8.38% of the total phenotypic variation. Synteny analysis of the QTL regions on the genome assembly revealed 12 immune-related genes, among them 4 genes strongly associated with V. anguillarum disease resistance. In addition, 246 genome assembly scaffolds with an average size of 21.79 Mb were anchored onto the LGs; these scaffolds, comprising 522.99 Mb, represented 95.78% of assembled genomic sequences. The mapped assembly scaffolds in Japanese flounder were used for genome synteny analyses against zebrafish (Danio rerio) and medaka (Oryzias latipes). Flounder and medaka were found to possess almost one-to-one synteny, whereas flounder and zebrafish exhibited a multi-syntenic correspondence. The newly developed high-resolution genetic map, which will facilitate QTL mapping, scaffold assembly, and genome synteny analysis of Japanese flounder, marks a milestone in the ongoing genome project for this species.
分类号: Q75
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