QIANG Guangfeng
College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaYANG Guoliang
Key Laboratory of Freshwater Aquatic Animal Genetic Breeding of Zhejiang ProvinceNational Genetic Breeding Center for Macrobrachium rosenbergiiZhejiang Institute of Freshwater Fisheries, Huzhou 313001, ChinaCHEN Xuefeng
Key Laboratory of Freshwater Aquatic Animal Genetic Breeding of Zhejiang ProvinceNational Genetic Breeding Center for Macrobrachium rosenbergiiZhejiang Institute of Freshwater Fisheries, Huzhou 313001, ChinaKONG Jie
The Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of AgricultureYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, ChinaXIA Zhenglong
Huzhou University, Huzhou 313000, ChinaGAO Qiang
Key Laboratory of Freshwater Aquatic Animal Genetic Breeding of Zhejiang ProvinceNational Genetic Breeding Center for Macrobrachium rosenbergiiZhejiang Institute of Freshwater Fisheries, Huzhou 313001, ChinaLUO Kun
The Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of AgricultureYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, ChinaLUAN Sheng
The Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of AgricultureYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China1. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China;
2. The Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture;Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China;
3. Laboratory for Marine Fisheries Science and Food Production Processes;Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;
4. Key Laboratory of Freshwater Aquatic Animal Genetic Breeding of Zhejiang Province;National Genetic Breeding Center for Macrobrachium rosenbergii;Zhejiang Institute of Freshwater Fisheries, Huzhou 313001, China;
5. Huzhou University, Huzhou 313000, China
S917
The accurate estimation of additive and dominant genetic effects is fundamental to improving the accuracy of selective breeding and accelerating genetic gains. This study harvested 29523 individuals from 343 full-sib families (244 half-sib families) and examined the G7, G8, and G9 generations. The variance components of harvest body weight for four datasets (G7, G8, G9, and G8+G9) were estimated using average information restricted maximum likelihood. Two single-trait animal models were used for the analysis:(1) an additive genetic model comprising additive genetic effects plus common environmental effects (A+C), and (2) an additive-dominant model that includes dominant genetic effects (D) (A+D+C). For the A+C model, heritability estimates of harvest body weight for the four datasets were all low ( ≤ 0.15), ranging from 0.046 to 0.082. For the A+D+C model, heritability ranged 0.063-0.096, and the ratio of dominant genetic variance to phenotypic variance spanned 0.027 to 0.571. Harvest-body-weight heritability decreased in three datasets (G7, G9, and G8+G9), while increasing in G8. Low heritability estimates indicate that wild or improved populations with strong production performance must be introduced and integrated with the nucleus breeding population. Additionally, large between-dataset differences in the ratio of dominant genetic variance to phenotypic variance suggest that the accuracy of dominance variance estimates should be improved with new algorithms including more generations.
强光峰,杨国梁,陈雪峰,孔杰,夏正龙,高强,罗坤,栾生. 罗氏沼虾高世代育种群体收获体重加性和显性遗传效应[J]. Jounal of Fishery Sciences of China, 2017,[volume_no](5):1027-1034
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