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猪13号染色体q41区的3个功能基因STS多态性与产肠毒素大肠杆菌F4ab/ac易感性相关 被引量:1

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摘要 由产肠毒素大肠杆菌(Escherichia coli)F4(ETEC F4)引起的断奶前仔猪腹泻病是一种常见细菌感染病,对养猪业造成了巨大经济损失.编码ETECF4ab/ac受体的位点已被定位于猪(Sus scrofa)13号染色体(SSC13)q41区域,S0075为最紧密连锁的标记之一.本研究从S0075侧翼染色体区域选择了SLC12A8,MYLK和KPNA13个基因,建立猪特异性序列标签位点(STS).利用白色杜洛克×二花脸资源家系群体中的ETECF4ab/ac侵染抗性和易感个体,通过比较测序法,建立了这3个基因的STS,并鉴别到7个单核苷酸多态位点.进一步检测了白色杜洛克×二花脸资源家系群体祖代、亲本代和755头F2个体在SLC12A8g.159A>G,MYLKg.1673A>G和KPNA1g.306A>G多态位点的基因型.传递不平衡检测(TDT)分析表明:这些多态位点和相应的单倍型与ETEC F4ab/ac(特别是F4ac)刷状缘黏附表型存在显著相关,表明这些多态位点和单倍型与ETEC F4ab/ac受体的编码基因因果突变存在连锁不平衡.本研究进一步证实了SSC13q41存在ETEC F4ab/ac侵染易感性的遗传位点,为ETEC F4ab/ac受体基因的精细定位提供了新型多态标记.
出处 《中国科学(C辑)》 CSCD 北大核心 2008年第3期271-276,共6页 Science in China(Series C)
基金 国家高技术研究发展计划(批准号:2006AA10Z194) 江西省重大科技创新计划资助项目
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