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Transcriptome Analysis Reveals Potential Regulatory Genes Related To Heat Tolerance In Holstein Dairy Cattle

文献类型： 外文期刊

作者： Ahmad, Muhammad Jamil;Yue, Tingting;Hu, Yan;Liu, Shenhe;Hu, Xiangwei;Zhou, Yang;Yang, Liguo;Zhang, Xinxin;He, Changjiu;Deng, Tingxian;Liu, Shenhe

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关键词： Heat Tolerance; Rna-Seq; Dairy Cows; Hub Genes; Milk Yield

期刊名称： GENES

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年卷期： 2020 年 11 卷 1 期

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摘要： Heat stress affects the physiology and production performance of Chinese Holstein dairy cows. As such, the selection of heat tolerance in cows and elucidating its underlying mechanisms are vital to the dairy industry. This study aimed to investigate the heat tolerance associated genes and molecular mechanisms in Chinese Holstein dairy cows using a high-throughput sequencing approach and bioinformatics analysis. Heat-induced physiological indicators and milk yield changes were assessed to determine heat tolerance levels in Chinese Holstein dairy cows by Principal Component Analysis method following Membership Function Value Analysis. Results indicated that rectal temperature (RT), respiratory rate (RR), and decline in milk production were significantly lower (p < 0.05) in heat tolerant (HT) cows while plasma levels of heat shock protein (HSP: HSP70, HSP90), and cortisol were significantly higher (p < 0.05) when compared to non-heat tolerant (NHT) Chinese Holstein dairy cows. By applying RNA-Seq analysis, we identified 200 (81 down-regulated and 119 up-regulated) significantly (|log2fold change| >= 1.4 and p <= 0.05) differentially expressed genes (DEGs) in HT versus NHT Chinese Holstein dairy cows. In addition, 14 of which were involved in protein-protein interaction (PPI) network. Importantly, several hub genes (OAS2, MX2, IFIT5 and TGFB2) were significantly enriched in immune effector process. These findings might be helpful to expedite the understanding for the mechanism of heat tolerance in Chinese Holstein dairy cows.

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