文章采用CRS-RFLP技术对长白猪、大白猪和杜洛克猪3个品种的整合素β1基因第5外显子T32207C位点及第7外显子A35230G位点进行单核苷酸多态性分析, 并将基因多态性与猪的产仔数进行关联分析。结果表明：32207多态位点的基因型效应对3个品种的总产仔数(TNB)和产活仔数(NBA)影响均不显著; 35230多态位点的基因型效应对大白猪和长白猪头胎、二胎及所有胎次的TNB和NBA的影响达到显著(P<0.05)或者极显著水平(P<0.01), 基因型GG、AG与AA对产仔数的影响存在差异, 其效应为GG, AG>AA。可见整合素β1基因35230位点的G等位基因对大白猪和长白猪的产仔数性状有显著影响。
Single nucleotide polymorphisms of exon 5 T32207C and exon 7 A35230G of integrin β1 gene were detected in Landrace, Large White and Duroc by CRS-RFLP. Association between the polymorphism and litter size was analyzed by the method of least square means. At 32207 polymorphic loci, there was no significant difference on TNB and NBA between the genotypes in Landrace, Large White, and Duroc. At 35230 polymorphic loci, there was significant difference (P<0.05) or greatly significant difference (P<0.01) on TNB and NBA between genotypes in the first, second, and all parities in Large White and Landrace. The effects of GG and AG genotypes were different from that of AA genotypes with the order of GG, AG>AA. These results suggested that the effect of G allele of integrin β1 gene on litter size is significant in Large White and Landrace.
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