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荣昌猪基因组DNA甲基化水平分析 被引量:4

Analysis of genome DNA methylation level in Rongchang Pigs
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摘要 【目的】探讨荣昌猪基因组DNA甲基化水平随生长发育阶段和组织类型不同而变异的规律。【方法】采用HPLC法分别检测了荣昌猪阉公猪心脏、肝脏、半膜肌3种组织在10,20,35,50,80和100 kg体质量阶段基因组DNA的甲基化水平,分别以体质量和组织类型为影响因素进行单因素方差分析。【结果】与10 kg体质量阶段的基因组DNA甲基化水平相比,3种组织基因组DNA甲基化水平均随个体体质量的增加而呈下降趋势,但不同组织下降的幅度不同:心脏基因组DNA甲基化水平在35 kg时开始明显下降(P<0.01),到100 kg时下降了44.00%;肝脏基因组DNA甲基化水平在80 kg时开始明显下降(P<0.05),到100 kg时下降了26.06%;半膜肌基因组DNA甲基化水平在20 kg时开始明显下降(P<0.01),到100 kg时下降了60.78%。半膜肌的基因组DNA甲基化水平在10 kg体质量阶段显著高于心脏(P<0.05),极显著高于肝脏(P<0.01),在20 kg体质量阶段极显著低于心脏和肝脏(P<0.01);肝脏的基因组DNA甲基化水平在35 kg体质量阶段显著高于半膜肌(P<0.05),在50和80 kg体质量阶段极显著高于心脏和半膜肌(P<0.01),在100 kg体质量阶段显著高于心脏(P<0.05),极显著高于半膜肌(P<0.01)。【结论】体质量阶段是猪基因组DNA甲基化水平的重要影响因素之一。DNA甲基化水平在肝脏与半膜肌间具有组织特异性,而在心脏与肝脏间、心脏与半膜肌间是否具有组织特异性与体质量阶段明显相关。 【Objective】The objective of this study was to explore the variations of DNA methylation level among different development stages and different tissues in Rongchang pigs.【Method】5-methylcytosine contents of heart,liver and semimembranosus tissues genomic DNA of Rongchang Pigs,among 6 different live weight stages including 10,20,35,50,80 and 100 kg were separately detected by high performance liquild chromatography(HPLC) in this study.One-factor analysis of variance was employed independently using live weigh...
出处 《西北农林科技大学学报(自然科学版)》 CSCD 北大核心 2010年第2期31-35,46,共6页 Journal of Northwest A&F University(Natural Science Edition)
基金 重庆市自然科学基金项目(CSTC2007BB0251)
关键词 荣昌猪 高效液相色谱 DNA甲基化 Rongchang Pig HPLC DNA methylation
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