A molecular marker of milk composition traits in NCAM2 gene of Chinese Holstein

文献类型： 外文期刊

第一作者： Ding, Xiaoting

作者： Ding, Xiaoting;Hu, Ruifang;Wen, Yifan;Huang, Yongzhen;Lei, Chuzhao;Zhang, Zijing;Shi, Qiaoting;Feng, Yajie;Wang, Eryao;He, Hua

作者机构：

关键词： Copy number variation (CNV); NCAM2 gene; milk traits; Chinese Holstein

期刊名称：ANIMAL BIOTECHNOLOGY （ 影响因子：2.282； 五年影响因子：1.702 ）

ISSN： 1049-5398

年卷期：

页码：

收录情况： SCI

摘要： The aim of this study was to detect the novel copy number variation (CNV) locus of NCAM2 gene in Chinese Holstein, and to analyze the effect of the novel CNV locus in NCAM2 gene on milk composition traits. The novel CNV locus of NCAM2 gene in 310 Chinese Holstein was detected by real-time quantitative fluorescent PCR (qPCR) and association analysis was performed between the novel CNV locus in NCAM2 gene and milk composition traits in Chinese Holstein. There are three CNV types of NCAM2 gene in Chinese Holstein: gain (increased copy number), median (normal copy number) and loss (deleted copy number). Statistical analysis revealed that there was a significant association between CNV types and milk fat rate (p < 0.05). Moreover, we also discovered that the milk production and milk protein rate of gain type is higher than that of loss type, but that of mediate type is lower than that of loss type. However, in terms of somatic cell score, loss type is higher than that of gain type, but that of mediate type is lower than that of gain type. These observations suggested that gain type can be used as a candidate molecular genetic marker of milk fat rate.

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