Genotypes, haplotypes and diplotypes of IGF-II SNPs and their association with growth traits in largemouth bass (Micropterus salmoides)

文献类型： 外文期刊

第一作者： Li, Xiaohui

作者： Li, Xiaohui;Bai, Junjie;Hu, Yinchang;Ye, Xing;Li, Shengjie;Yu, Lingyun;Li, Xiaohui

作者机构：

关键词： Largemouth bass;Insulin-like growth factor II;Single nucleotide polymorphism;Haplotype;Diplotype;Growth traits

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

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年卷期：

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收录情况： SCI

摘要： Insulin-like growth factor II (IGF-II) is involved in the regulation of somatic growth and metabolism in many fishes. IGF-II is an important candidate gene for growth traits in fishes and its polymorphisms were associated with the growth traits. The aim of this study is to screen single nucleotide polymorphisms (SNPs) of the largemouth bass (Micropterus salmoides) IGF-II gene and to analyze potential association between IGF-II gene polymorphisms and growth traits in largemouth bass. Four SNPs (C127T, T1012G, C1836T and C1861T) were detected and verified by DNA sequencing in the largemouth bass IGF-II gene. These SNPs were found to organize into seven haplotypes, which formed 13 diplotypes (haplotype pairs). Association analysis showed that four individual SNPs were not significantly associated with growth traits. Significant associations were, however, noted between diplotypes and growth traits (P < 0.05). The fish with H1H3 (CTCC/CGCC) and H1H5 (CTCC/TTTT) had greater body weight than those with H1H1 (CTCC/CTCC), H1H2 (CTCC/TGTT) and H4H4 (TGCT/TGCT/) did. Our data suggest a significant association between genetic variations in the largemouth bass IGF-II gene and growth traits. IGF-II SNPs could be used as potential genetic markers in future breeding programs of largemouth bass.

分类号： Q7

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