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| Genetic Ability of Precocious Characters of One-Year Old Sexual Precocity of Chinese Mitten Crab Eriocheir sinensis |
| ZHENG Yan, LIANG Fang, GENG Dan, LI Yang, LIU Xu |
| Liaoning Provincial Key Laboratory of Eriocheir sinensis Breeding,Panjin Guanghe Crab Industry Co., Ltd., Panjin 124200, China |
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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.
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Received: 19 May 2020
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[1]付龙龙,周刚,李跃华,等.中华绒螯蟹蟹种性早熟研究进展[J].江苏农业科学,2017,45(12):19-23.
[2]徐兴川,朱正东.中华绒螯蟹性成熟蟹种的形成、危害、识别及预防的探讨[J].淡水渔业,1994,24(6):3-6.
[3]何正侃,印骏,朱雅珠.密度、营养与河蟹蟹种生长及性早熟之间的相关关系[J].水产科技情报,1999,26(2):73-75.
[4]张列士,徐琴英.自然及养殖水体河蟹性成熟和性早熟的研究[J].水产科技情报,2001,28(3):106-111.
[5]章星明.降低幼蟹性早熟比例的技术研究[J].中国水产,2012(6):68-69.
[6]朱雅珠,王建军,张根玉,等.饲料中胆固醇的添加量及蛋白含量对蟹种生长及性早熟的影响[J].渔业现代化,1999,26(3):3-6.
[7]杜晓燕,张德隆,赵金利,等.池养河蟹性早熟现象的初步分析[J].大连水产学院学报,2000,15(4):254-258.
[8]魏薇,吴嘉敏,魏华.盐度对中华绒螯蟹性早熟生理机制的影响[J].中国水产科学,2007,14(2):275-280.
[9]张佳鑫,徐敏杰,黄根勇,等.正常与性早熟中华绒螯蟹的Y-器官转录组分析[J].水产学报,2017,41(11):1667-1679.
[10]李海燕,侯林,魏凤艳.中华绒螯蟹辽河种群野生、养殖及 “性早熟” 个体RAPD分析[J].水产科学,2003,22(3):1-3.
[11]顾景龄,王庆奎,王茜.养殖河蟹(Eriochir sinensis)性早熟的原因及防范措施[G]∥2004年甲壳动物学分会会员代表大会暨学术年会论文集.青岛:中国动物学会甲壳动物学分会,中国海洋与湖沼学会甲壳动物学分会,2004:62-63.
[12]马大勇,胡红浪,孔杰.近交及其对水产养殖的影响[J].水产学报,2005,29(6):849-856.
[13]殷悦,徐宇,唐刘秀,等.中华绒螯蟹蜕皮抑制激素基因单核苷酸多态与性早熟的关联性分析[J].水产养殖,2019,40(1):14-17.
[14]羊茜,占家智.辽河蟹与长江蟹生长速度的对比试验[J].淡水渔业,1999,29(10):40-42.
[15]周刚,朱清顺,胡本龙.不同水系中华绒螯蟹生长比较的初步研究[J].水产养殖,2003,24(6):34-37.
[16]王海宁,刘青,吴旭干,等.中华绒螯蟹一龄性早熟和二龄成熟家系子一代成蟹阶段生长发育性能的比较研究[J].淡水渔业,2017,47(3):84-89.
[17]朱王玲,姜晓东,吴旭干,等.中华绒螯蟹一龄早熟和二龄成熟家系生长规律的比较研究[J].动物学杂志,2017,52(6):1037-1047. |
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