In this paper, a total of 36 maturing river prawns (Macrobrachium nipponense) were from Taihu wild population. 6 sires and 30 dams were mated by an unbalanced nest design. Each sire was mated to 5 dams, producing 4 half-sib groups and 8 full-sib families. Each full-sib family was reared separately and all families were given as equal environmental conditions as possible. Each family was harvested and the body length, abdominal length and body weight were measured at 65 and 97 days after hatching. The results showed:(1) the survival rate in larval rearing ranged from 13.52% to 25.24%, and there were 92 larvae on average in each family. Survival rate of breeding at 65d and 97d after hatching is 82.18% and 57.88%, respectively. Sex ratio in each family is 1:0.01-0.08 and some individuals at 65d berried, and each family berried ratio is 1.75% <br> -20.51%. The above results suggested it is difficult for oriental river prawns to practise large-scale family-based breeding program. (2) The estimates of narrow-sense heritability calculated from the additive genetic component using a paternal half-sib correlation analysis ranged from 0.082 to 0.180 for body length, 0.075 to 0.160 for abdominal length, and 0.125 to 0.213 for body weight. It was suggested that the effect for improve-ment through family selection and hybridization between populations is more suitable for growth traits of orient river prawns.
NETL
NSTL
维普
万方数据
