Authors: CEYHAN ÖZBEYAZ, MEHMET ALİ YILDIZ, HANDAN ÇAMDEVİREN
Abstract: Average heterozygosity (h^-_s), F-statistics and genetic distance (d_ij) of different Brown Swiss cattle herds in Turkey (Malya, Konuklar and Anadolu State Farms, Eskişehir Sugar Factory Farm and Van Agriculture Secondary School Farm) were compared with each other by using Hb, Tf, Am-I, Am-II and Cp (monomorphic) loci. Average heterozygosity values were estimated to be 0.2371 ± 0.1076 to 0.2876 ± 0.1027 and there were no significant differences among herds. F-statistics F^~_IS_w, F^~_IT_w and F^~_ST_w were estimated to be 0.0601 (p<0.05), 0.1064 (p<0.01) and 0.0493 (p<0.01) for whole loci, respectively. Matings in the populations were not random and the genetic differences among populations resulted from Tf, Pa and Am-I loci. Genetic distance values were found to be between 0.0043 and 0.0237. Cluster analysis (UPGMA) results showed that Konuklar State Farm and Eskişehir Sugar Factory herds were in the same class and this main group was joint first with Anadolu State Farm herd, joint second with Malya State Farm herd, followed by Van Agriculture Secondary School herd. It was concluded that there have been inbreeding structures in all Swiss Brown herds and the genetic differences between herds should be determined by using F-statistics and genetic distance values. In addition, classification of populations by the cluster analysis was a useful method.
Keywords: Cattle, Brown Swiss, Heterozygosity, F-statistics, Genetic Distance, Cluster Analysis
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