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松辽黑猪IGF-Ⅰ基因的单核苷酸多态性(SNP)及其与生长和胴体性状的关联性 被引量:11

SNP of the IGF-I gene and its association with growth and carcass traits in Songliao black pig
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摘要 采用PCR-SSCP技术分析了IGF-Ⅰ基因的5’UTR、外显子4在松辽黑猪群体中的遗传多态性。结果在所扩增的IGF-Ⅰ基因的5’UTR中的2个目的片段均未发现PCR-SSCP遗传多态;在第4外显子中发现PCR-SSCP多态,有2种等位基因A和B,有3种基因型AA型、AB型、BB型。对多态片段的测序分析表明:在IGF-Ⅰ基因第4外显子中存在有1碱基A→G突变。适合性卡方检验表明,该位点的不同基因型频率处于Hardy-Weinberg平衡。用最小二乘法分析IGF-Ⅰ基因第4外显子不同基因型与松辽黑猪生长和胴体性状的相关性,发现IGF-Ⅰ不同基因型对断奶后日增重有显著影响,AA型显著高于AB型和BB型(P<0.01)。AA型猪的瘦肉率显著低于AB型和BB型(P<0.01),而AA型猪的平均背膘厚显著高于AB型和BB型(P<0.01),对其他性状的影响差异不显著。结果表明,松辽黑猪IGF-Ⅰ基因应是影响生长和胴体性状的一个主效基因或与影响这些性状的主效基因紧密连锁。 The single nucleotide polymorphism of the IGF-Ⅰ gene in Songliao black pig was analyzed by PCR-SSCP.The results showed that the polymorphisms were not detected by PCR-SSCP in the 5 UTR of the IGF-Ⅰ gene.And two alleles,A,and B,three genotypes,AA,AB,and BB,were detected in the exon 4 of the IGF-Ⅰ gene.The polymorphism fragments were cloned and sequenced.The sequencing results indicated there was one single nucleotide mutation:A→G in the exon 4 of the IGF-I gene.The Chi-square test for goodness of fit showed ...
出处 《中国兽医学报》 CAS CSCD 北大核心 2008年第6期724-728,共5页 Chinese Journal of Veterinary Science
基金 国家振兴东北老工业基地科技攻关项目(2004BA907A22) 吉林省重大科技专项基金资助项目(20065019) 吉林省牧业科技项目
关键词 松辽黑猪 IGF-Ⅰ基因 PCR-SSCP 单核苷酸多态性(SNP) 相关分析 Songliao black pig IGF-Ⅰ gene PCR-SSCP single nucleotide polymorphism correlation analysis
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