| Seventeen species-specific primers were chosen from 86 pairs of genetic linkage map markers of Nile tilapia. Genetic characteristics of Sudan stock and New GIFT stock of Nile tilapia, Israel stock and Maoming stock of Blue tilapia were analyzed. The result showed that the effective number of alleles in 4 stocks was New GIFT(2.8)>Sudan(2.72), Israel(2.96)>Maoming(2.6); genetic heterozygosity was Sudan (0.73)>New GIFT(0.68), Israel(0.89)>Maoming(0.56); the polymorphism information content was Sudan(0.58)>New GIFT(0.51), Israel (0.56)>Maoming (0.52). In general, New GIFT stock of Nile tilapia and Maoming stock of Blue tilapia had low genetic diversity. The average genetic distance between Nile tilapia and Blue tilapia was 0.3057, genetic distance between Sudan and New GIFT was 0.107, and distance between Israel and Maoming was 0.1268, the largest genetic distance lied between Sudan and Maoming stocks. |
