Abstract：From early June to early October, 2016—2018, the megalopa with body weight of 1.5×105—1.6×105 ind./kg of one-year old precocious Chinese mitten crab Eriocheir sinensis, the F3, F2 and F1 of self-bred selective one-year old precocious crab in the family, and non-selective crab (i.e. crab seedlings) were raised in an effective area of 40 m2 enclosure in a paddy field with rice planted at a row spacing of 30 cm and a plant spacing of 20 cm at stocking density of 2500 ind. seedlings per enclosure to compare the breeding characteristics of the selective breeding crab and the non-selective Chinese mitten crab. The results showed that the self-bred selective F1 had slightly lower recapture rate of precocious crab (P>0.05), and sharply decrease in F2 (P<0.01), and the recapture rate of precocious crab was very significant positively correlated with juvenile crab size (P<0.01), and very significant negatively correlated with the recapture rate of juvenile crab and total recapture rate (P<0.01). There was significantly different recapture rate of precocious crab in F1 from that in non-selective crab in the same period (P<0.01), higher in F1, with very significant different from non breeding crab and non-selective crab (P<0.01), higher in non breeding crab. The very significant difference was observed between F2 and the same period breeding crab and non breeding crab (P<0.01), higher in F2. There was significant difference in recapture rate of precocious crab between F3 and the same period breeding crab and non breeding crab (P<0.01), the minimal in F3 and the maximal in the non breeding crab. It is speculated that inheritance is the main factor leading to precocious puberty, and the genes related to precocious puberty are relatively easy to clear through inbreeding. Selective breeding is an effective way to improve the germplasm of Chinese mitten crab and reduce the precocious ratio.
郑岩, 梁芳, 耿丹, 李杨, 刘胥. 1龄性早熟中华绒螯蟹早熟性状遗传能力的研究[J]. 水产科学, 2021, 40(6): 889-894.
ZHENG Yan, LIANG Fang, GENG Dan, LI Yang, LIU Xu. Genetic Ability of Precocious Characters of One-Year Old Sexual Precocity of Chinese Mitten Crab Eriocheir sinensis. Fisheries Science, 2021, 40(6): 889-894.
2021, Vol. 40 
