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首页> 外文期刊>Journal of genetics >Identification of genes showing differential expression profile associated with growth rate in skeletal muscle tissue of Landrace weanling pig
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Identification of genes showing differential expression profile associated with growth rate in skeletal muscle tissue of Landrace weanling pig

机译:鉴定显示长白猪断奶仔猪骨骼肌组织中与生长速率相关的差异表达谱的基因

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Suppression subtractive hybridization was used to identify genes showing differential expression profile associated with growth rate in skeletal muscle tissue of Landrace weanling pig. Two subtracted cDNA populations were generated from musculus longissimus muscle tissues of selected pigs with extreme expected breeding values at the age of 100 kg. Three upregulated genes (EEF1A2, TSG101 and TTN) and six downregulated genes (ATP5B, ATP5C1, COQ3, HADHA, MYH1 and MYH7) in pig with genetic propensity for higher growth rate were identified by sequence analysis of 12 differentially expressed clones selected by differential screening following the generation of the subtracted cDNA population. Real-time PCR analysis confirmed difference in expression profiles of the identified genes in musculus longissimus muscle tissues between the two Landrace weanling pig groups with divergent genetic propensity for growth rate. Further, differential expression of the identified genes except for the TTN was validated by Western blot analysis. Additionally, the eight genes other than the ATP5C1 co-localized with the same chromosomal positions as QTLs that have been previously identified for growth rate traits. Finally, the changes of expression predicted from gene function suggested association of upregulation of expression of the EEF1A2, TSG101 and TTN genes and downregulation of the ATP5B, ATP5C1, COQ3, HADHA, MYH1 and MYH7 gene expression with increased growth rate. The identified genes will provide an important insight in understanding of the molecular mechanism underlying growth rate in Landrace pig breed.
机译:使用抑制性消减杂交来鉴定基因,这些基因显示出与长白猪断奶仔猪骨骼肌组织中生长速率相关的差异表达谱。从选定猪的小肌肌肉组织中产生两个减去的cDNA群体,它们在100公斤龄时具有极高的预期繁殖值。通过差异筛选筛选的12个差异表达克隆的序列分析,确定了猪具有较高生长速率的3个上调基因(EEF1A2,TSG101和TTN)和6个下调基因(ATP5B,ATP5C1,COQ3,HADHA,MYH1和MYH7)。产生减去的cDNA群体。实时PCR分析证实了两个长势断奶仔猪群体中长肌小肌肉组织中已鉴定基因的表达谱存在差异,其生长速率具有不同的遗传倾向。此外,通过蛋白质印迹分析验证了除TTN以外的已鉴定基因的差异表达。此外,除ATP5C1以外的其他8个基因与QTL的染色体位置相同,这些QTL先前已针对生长速率性状进行了鉴定。最后,从基因功能预测的表达变化提示EEF1A2,TSG101和TTN基因表达上调与ATP5B,ATP5C1,COQ3,HADHA,MYH1和MYH7基因表达下调与生长速率增加相关。鉴定出的基因将为了解长白猪品种生长速度的分子机制提供重要的见识。

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