Global copy number analyses by next generation sequencing provide insight into pig genome variation

文献类型： 外文期刊

第一作者： Jiang, Jicai

作者： Jiang, Jicai;Wang, Haifei;Kang, Huimin;Feng, Xiaotian;Zhang, Qin;Liu, Jian-Feng;Wang, Jiying;Zhang, Yan;Wang, Jiafu;Yin, Zongjun;Bao, Wenbin

作者机构：

关键词： Copy number variations (CNVs);Segmental duplications (SDs);Next generation sequencing (NGS);Pigs

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2014 年 15 卷

页码：

收录情况： SCI

摘要： Background: Copy number variations (CNVs) confer significant effects on genetic innovation and phenotypic variation. Previous CNV studies in swine seldom focused on in-depth characterization of global CNVs. Results: Using whole-genome assembly comparison (WGAC) and whole-genome shotgun sequence detection (WSSD) approaches by next generation sequencing (NGS), we probed formation signatures of both segmental duplications (SDs) and individualized CNVs in an integrated fashion, building the finest resolution CNV and SD maps of pigs so far. We obtained copy number estimates of all protein-coding genes with copy number variation carried by individuals, and further confirmed two genes with high copy numbers in Meishan pigs through an enlarged population. We determined genome-wide CNV hotspots, which were significantly enriched in SD regions, suggesting evolution of CNV hotspots may be affected by ancestral SDs. Through systematically enrichment analyses based on simulations and bioinformatics analyses, we revealed CNV-related genes undergo a different selective constraint from those CNV-unrelated regions, and CNVs may be associated with or affect pig health and production performance under recent selection. Conclusions: Our studies lay out one way for characterization of CNVs in the pig genome, provide insight into the pig genome variation and prompt CNV mechanisms studies when using pigs as biomedical models for human diseases.

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