›› 2007, Vol. 34 ›› Issue (2): 55-57.

• 遗传繁育 • Previous Articles     Next Articles

The Exon4 Polymorphism of IGF-Ⅰ Gene and Its Relationship with Partial Performances in Songliao Black Swine

XIAO Shuqi1,ZHANG Jiabao1,LI Shuang1,ZHAO Zhihui2,REN Wenzhi1, ZHAO Zhongli1,ZHANG Shumin3,DAI Lisheng1, GAO Yan1,LI Yi1
   

  1. 1.Laboratory Animal Center of Jilin University,Changchun 130062，China; 2.College of Animal Science and Veterinary Medicine of Jilin University,Changchun 130062，China; 3.Agricultural Sciences Academy of Jilin,Gongzhuling 136100，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-02-20 Published:2007-02-20

Abstract: IGF-Ⅰ gene was chosen as a candidate gene for growth and carcass traits of songliao black swine.The exon4(179bp) polymorphism of IGF-Ⅰ gene was detected by PCR-SSCP in 30 pigs,and the relationship between the polymorphism and growth and carcass traits was analyzed.The results showed that 2 alleles and 3 genotypes of IGF-Ⅰ gene were detected in songliao black swine,there was a higher degree of polymorphism; different IGF-Ⅰ genotypes significantly affected average daily gain after weaning.Average daily gain after weaning for AA genotype on IGF-Ⅰ was significantly higher than for AB and BB. The pigs with AA genotype had a lower lean percentage than those with AB genotype and BB genotype(P<0.01), and had a higher average backfat thickness than those with AB genotype and BB genotype(P<0.01). Other traits were not significantly affected.Therefore,the genetic analysis of IGF-Ⅰ gene revealed that IGF-Ⅰ locus significantly affected average daily gain after weaning, lean percentage,and average backfat thickness,it could be preliminarily deduced that IGF-Ⅰ gene was probably a major gene or a QTL linked gene which associated with growth and carcass traits.

Key words: songliao black swine; IGF-Ⅰ; PCR-SSCP; performance

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