基于转录组测序对不同岁龄大青山山羊背最长肌中脂肪代谢相关基因的筛选及分析

doi:10.3969/j.issn.1674-7968.2023.06.008

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Abstract Daqingshan goat (Capra hircus) is one of the typical meat and cashmere goat groups in Inner Mongolia. There is a certain correlation between the accumulation of fat in muscle or metabolic of farmed animals and breeding time, way and so on. The fat content in the muscle has a direct impact on meat quality. In order to explore the transcriptome differences of meat quality and the data information of related genes in Daqingshan goats at different breeding stages, 3 Daqingshan goats of different ages (1.5, 2.5 and 3.5 years old) were used as research objects, the meat quality index of the longissimus dorsi was determined and the transcriptome was sequenced and analyzed. Results showed that the 3 age groups had no significant difference in drip loss and pH, but the crude fat content and the shear strength 3.5 years of age were significantly higher than the other 2 age groups (P＜0.05). The results of transcriptome data showed that there were 468 differentially expressed genes (transcripts) between 1.5 and 2.5 years old, 487 differentially expressed genes (transcripts) between 1.5 and 3.5 years old, and 376 differentially expressed genes (transcripts) between 2.5 years old and 3.5 years old. The differentially expressed genes were enriched in 44, 41 and 28 metabolic pathways, respectively, and the differentially expressed genes in 3 age groups were enriched in 85 functional items. According to GO functional annotation and KEGG pathway enrichment analysis, 9 differentially expressed genes related to the metabolism or deposition of lipids were obtained. These genes were regulator of G protein signaling protein 2 (RGS2), estrogen-related receptor γ (ESRRG), peroxisome proliferators- activated receptor- γ coactivator 1 A (PPARGC1A), myotubularin-related protein 6 (MTMR6), ankyrin repeat domain 9 (ANKRD9), transmembrane protein 160 (TMEM160), XVI phospholipase A2 (group XVI phospholipase A2, PLA2G16), fos-like antigen 1 (FOSL1) and a disintegrin and metalloproteinase with thrombospondin motifs 4 (ADAMTS4). Randomly selected RGS2, ANKRD9, FOSL1 and ADAMTS4 genes were verified by qPCR technology. Results showed that the trend of 4 genes expressed in 3 different age group were basically identical with the transcriptome sequencing results. The differentially expressed genes obtained in this study can provide basic data for the further study of meat quality characteristics of Daqingshan goat.

Key words： Daqingshan goat Ages Longissimus dorsi muscle Fat deposition Transcriptome Differentially expressed genes

Received: 11 July 2022

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Corresponding Authors: *heyinf6468@163.com; lilijie1978@163.com

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	ZHANG Bao-Jun
	TIAN Jian-Jun
	ZHANG Yan-Jun
	LI Jin-Quan
	LI Li-Jie1
	HE Yin-Feng

Cite this article:

ZHANG Bao-Jun,TIAN Jian-Jun,ZHANG Yan-Jun, et al. Genes Screening Related to Fat Metabolism Function and Analysis of Daqingshan Goat's (Capra hircus) Longissimus Dorsi Muscle of Different Ages Based on RNA-seq[J]. 农业生物技术学报, 2023, 31(6): 1193-1205.

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http://journal05.magtech.org.cn/Jwk_ny/EN/10.3969/j.issn.1674-7968.2023.06.008 OR http://journal05.magtech.org.cn/Jwk_ny/EN/Y2023/V31/I6/1193

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