Abstract: In order to observe the polymorphism distribution of H-FABP and LPIN1 gene in different breeds of swines,analysis was carried out upon 61 Junmu 1 White pigs,51 Durocs pigs and 51 Tibetian pigs by PCR-RFLP. The results revealed that all these three breeds showed a single genotype of HH on the Hinf Ⅰ locus and showed polymorphism on the Hae Ⅲ locus for H-FABP,with D allelic frequency of 0.1475,0.2255 and 0.7647,respectively. The H-FABP/Msp Ⅰ locus,however,behaved a single genotype of aa in Junmu 1 White pigs and the A allelic frequency was 0.6078 and 0.4609 in Duroc and Tibetian pigs respectively. For LPIN1 /Eco88 Ⅰ,Duroc pigs showed single genotype of AA and Junmu 1 White and Tibetian pigs showed polymorphism with A allelic frequency of 0.4262 and 0.2059, respectively. For LPIN1/Bsh1236 Ⅰ locus,Duroc pigs showed single genotype of TT,Junmu 1 White and Tibetian pigs showed polymorphism with the T allelic frequency of 0.7459 and 0.2059, respectively.

Key words: Junmu 1 White pig; Duroc pig; Tibetian pig; H-FABP gene; LPIN1 gene