Abstract: To investigate the genetic structure of inbred line of Guangxi Bama miniature pig from the 10^th to the 15^th generations,33 individuals of the inbred line and 19 microsatellite loci were used to estimate their number alleles (N),polymorphic information content (PIC) and inbreeding coefficients (F).The results showed that there were a total of 31 alleles at the 19 loci,and the number of allele on F10,F11,F12,F13,F14 and F15 groups were 27,29,28,27,26 and 25,respectively;Average loci alleles were 1.42,1.53,1.47,1.42,1.37 and 1.32,respectively;The average inbreeding coefficients of animals from the 10^th to the 15^th generations were 0.8070,0.8263,0.8491,0.8710,0.8904 and 0.9118,respectively.In addition,the average PIC was 0.1044.The results indicated that the inbred line of Guangxi Bama miniature pig had low gene polymorphism and high inbreeding coefficients and it was concluded that this inbreeding line had already become a genetically stable animal herd.

Key words: Guangxi Bama miniature pig; microsatellite; polymorphic information content (PIC); inbreeding line