【摘要】 运用PCR-SSCP方法,研究了山西省外种猪(长白、大白和杜洛克)ESR基因PvuⅡ位点多态性及其与产仔数的关系。结果表明,三个外种猪在该位点均存在多态性,等位基因B的频率较低,均小于0.5。不同基因型对总产仔数和活产仔数的影响差异显著(<0.05)。头胎总产仔数和活产仔数均存在BB高于AB,AB高于AA的规律,BB和AA纯合子间总产仔数(TNB)和活产仔数(NBA)分别相差3.361头和1.913头,等位基因B的加性效应对总产仔数和活产仔数分别为1.680和0.957。更多还原

【Abstract】 TheESR genewasstudiedforpolymorphismsatPvuⅡ locusand their associationswith litter sizetraits inthreeforeign procine breeds in Shanxi province by PCR-SSCP method.The result indicated that ESR PvuⅡ locus existed pol-ymorphism in the three foreign breeds swine. B allele frequency was lower than 0.5.Significant variance was found on totalnumber born (TNB) and number born alive (NBA) between various genotyp(e < 0.05).TNB and NBA tended to be in aformula of BB>AB>AA in first parity.TNB and NBA of BB gilts were higher than those of AA gilts by 3.361 piglet/litterand 1.913 piglet/litter respectively.The additive effect of allele B on TNB and NBA was 1.680 and 0.957,respectively.更多还原