The present study is conducted to determinate fatty acids(FA) composition in 3 adipose tissues. Subcutaneous and perirenal adipose tissues were prepared from 24 Ningxiang castrated boars and 24 castrated gilts fattene...The present study is conducted to determinate fatty acids(FA) composition in 3 adipose tissues. Subcutaneous and perirenal adipose tissues were prepared from 24 Ningxiang castrated boars and 24 castrated gilts fattened by a traditional diet for 56 d, respectively. The results showed that the FA profile in the 3 adipose tissues(dorsal subcutaneous adipose [DSA], abdominal subcutaneous adipose [ASA], and perirenal adipose [PA]) differed greatly. In boars, the proportions of oleic acid(c18:1 n9 c)(P < 0.05), cis-11-20 c acid(c20:1)(P < 0.05), and a-linolenic acid(c18:3 n3)(P < 0.05) in DSA were the highest among 3 adipose tissues, whereas palmitic acid(c16:0)(P < 0.05) and stearic acid(c18:0)(P < 0.05) in DSA had the lowest proportion. In gilts, cis-11-20 c acid(c20:1)(P < 0.05) in DSA was the highest, while stearic acid(c18:0)(P < 0.05) in subcutaneous adipose was the lowest among these deposits. Overall, the results indicate that from external to inner carcass of boars, the sum of saturated fatty acids(SFA) increase, but the sum of monounsaturated fatty acids(MUFA) decrease, while ASA of gilts have the greatest proportion of MUFA and the lowest SFA. Sex and adipose locations as significant effects on the FA profile are interaction.展开更多
基金jointly supported by the Major Project of Hunan Province(2015NK1002)Hunan Provincial Innovation Foundation for Postgraduate(CX2016B277)+1 种基金Key Project of Hunan Provincial Education Department(16A096)Strategic Cooperation Project between Hunan Agricultural University and People's Government of Ningxiang(basic research in Ningxiang pigs)
文摘The present study is conducted to determinate fatty acids(FA) composition in 3 adipose tissues. Subcutaneous and perirenal adipose tissues were prepared from 24 Ningxiang castrated boars and 24 castrated gilts fattened by a traditional diet for 56 d, respectively. The results showed that the FA profile in the 3 adipose tissues(dorsal subcutaneous adipose [DSA], abdominal subcutaneous adipose [ASA], and perirenal adipose [PA]) differed greatly. In boars, the proportions of oleic acid(c18:1 n9 c)(P < 0.05), cis-11-20 c acid(c20:1)(P < 0.05), and a-linolenic acid(c18:3 n3)(P < 0.05) in DSA were the highest among 3 adipose tissues, whereas palmitic acid(c16:0)(P < 0.05) and stearic acid(c18:0)(P < 0.05) in DSA had the lowest proportion. In gilts, cis-11-20 c acid(c20:1)(P < 0.05) in DSA was the highest, while stearic acid(c18:0)(P < 0.05) in subcutaneous adipose was the lowest among these deposits. Overall, the results indicate that from external to inner carcass of boars, the sum of saturated fatty acids(SFA) increase, but the sum of monounsaturated fatty acids(MUFA) decrease, while ASA of gilts have the greatest proportion of MUFA and the lowest SFA. Sex and adipose locations as significant effects on the FA profile are interaction.
文摘为了比较分析宁乡猪皮下脂肪(subcutaneous fat,SAF)和肌内脂肪(intramuscular fat,IMF)组织脂肪沉积的分子机制,本文利用RNA-seq技术鉴定和分析宁乡猪SAF和IMF组织中差异基因表达谱。选取6头250日龄健康状况良好、种内个体体重相近(约85 kg)的雄性宁乡猪为实验材料,采集SAF与IMF组织样品。通过对两个脂肪组织转录组测序并进行GO(Gene Ontology)功能注释及KEGG(Kyoto Encyclopedia of Genes and Genomes)信号通路富集分析,得到与脂肪沉积和脂质代谢相关的差异基因。为验证测序数据结果的可靠性,本研究随机选取6个差异基因进行qRT-PCR验证。结果表明,宁乡猪SAF和IMF组织中有2406个基因差异表达,其中1422个基因表达上调,984个基因表达下调。通过GO功能注释分析发现,差异表达基因主要通过参与类固醇生物合成、不饱和脂肪酸的生物合成、甘油磷脂代谢及自噬途径等与脂质代谢相关途径,调控宁乡猪SAF和IMF的沉积。KEGG通路富集结果显示,差异基因主要富集在脂质结合、脂肪酸代谢过程、甘油酯代谢过程、脂类生物合成等与脂质代谢相关的生物学过程。qRT-PCR结果与测序结果一致,表明测序结果可靠。通过对宁乡猪SAF与IMF组织进行转录组测序以及生物信息学分析,筛选到TCAP、NR4A1、ACACA、LPL、ELOVL6、DGAT1、PRKAA1、ATG101、TP53INP2、FDFT1、ACOX1和SCD等基因与脂质代谢相关,这些基因可能在宁乡猪SAF与IMF组织中脂肪沉积和代谢过程发挥重要调控作用,对进一步研究宁乡猪脂肪沉积机制具有重要意义。
