Abstract:Establishing meiotic gynogenesis, mitotic gynogenesis, and inbred lines is important for trait purification during selective fish breeding. Yet how these three genetic pathways affect heredity remains the focus of much genetics research. In this study, we used the female parents from family F09119 to establish mitotic gynogenesis (F1346), meiotic gynogenesis (F1324), and an inbred line (F1313) and analyzed their growth and genetic characteristics. Body length, body width, and weight were measured in the three families from 85 to 388 d post fertilization (dpf). Results on 338 dpf showed that growth rate of F1346 was the highest[body length, (28.89±2.77) cm; body width, (10.00±1.21) cm; and weight, (254.91±83.11) g] and that of F1324 was the lowest (<0.05). Survival rate of F1324 on 263 dpf was the highest (46.50%) and that of F1346 was the lowest (26.80%). The numbers of alleles for mitotic gynogenesis, meiotic gynogenesis, and the inbred line were 2.0, 2.0 and 2.35, respectively. The effective numbers of alleles were 1.87, 1.95, and 2.1; polymorphic information content values were 0.35, 0.36, and 0.4; and mean observed heterozygosity values were 0, 0.8155, and 0.6366, respectively, indicating that genetic variation of mitotic gynogenesis and meiotic gynogenesis was less than that of the inbred line. The trend for unbiased expected homozygosity was F1313 (0.503) < F1324 (0.5105) < F1346 (0.532) and that of unbiased expected heterozygosity was F1313 (0.4967) > F1324 (0.4894) > F1346 (0.4679). Homozygosity of meiotic gynogenesis was 1.0421-fold higher than that of meiotic gynogenesis and 1.0577-fold higher than that of the inbred line, whereas that of meiotic gynogenesis was 1.0149-fold higher than that of the inbred line. The genetic distance between F1346 and F1313 was longest (0.1568) but genetic similarity was the lowest (0.8549), whereas the genetic distance between F1346 and F1324 was the shortest (0.0406), and genetic similarity was the greatest (0.9602). These results provide a theoretical basis for establishing an inbred line of and analyses of genetic variations among meiotic gynogenesis, mitotic gynogenesis, and the inbred line.