Studies On Microsatellite Genetic Marker And Real-Time Ultrasound Measurements For Major Performance Traits In Beef Cattle

Seven cattle breeds, including Simmental, Charolais, Limousin, Angus, Jinnan, Qinchuan, Luxi, were used as experimental population. The genetic variatipn (gene frequency, heterozygosity, polymorphic information content and effective number of alleles ) and genetic structure of 8 microsatellite loci ( BM8125, RM113, TEXAN2,FCB48, INRA027, IDVGA37. BMS2137. ILSTS098 ) was analyzed in 7 cattle populations. The results showed that 6 of 8 microsatellite loci were highly plymorphic in these 7 breeds, The clustering dendrogram by genetic distance of the 8 microsatellites can correctly reflect geographical distribution of and the relationship among the 7 cattle populations.Eight microsatellite loci were associated to beef performance traits of Jinnan, Qinchuan,Charolais,Limousin. For microsatellite TEXAN2, allele 120/120 had a positive relation with back fat thickness, however, microsatellite BM8125, allele 125/125 showed a significant negative correlation with back fat thickness. For allele 118/134 of microsatellite BM8125, allele 116/133 of microsatellite TEXAN2 and allele 158/178 168/192 of microsatellite INRA027, had a positive relation with marbling, however, allele 129/144 of microsatellite BSM2317 and allele 159/159 of microsatellite FCB48 showed a significant negative correlation with marbling.In this experiment,the correcte of ultrasound measures was analyzed. The results Substantiate the correcte.