Chinese mitten crab(Eriocheir sinensis) is an indigenous and ecologically and economically important species in the Liao River area, but its identification and genetic diversity remain poorly understood. To evaluate t...Chinese mitten crab(Eriocheir sinensis) is an indigenous and ecologically and economically important species in the Liao River area, but its identification and genetic diversity remain poorly understood. To evaluate the germplasm resources of this species, samples were collected from these locations: four sub-populations from the Liao River area and one population from the Yangtze River area; one primer was used to distinguish between the Liao River and the Yangtze River crabs. Thirteen loci were used for crab genetic diversity analysis, and basic statistics showed that the collecting samples were purebred in the Liao River area. The average observed heterozygosity(H_0) of the Liao River population was 0.5931, and the expected heterozygosity(H_e) was 0.8064. The polymorphism information content(PIC) was 0.7753, which showed that the Liao River population had high genetic diversity. The genetic differentiation index(F_(ST)) averaged 0.0342, meaning a low degree of differentiation; cluster analysis indicated that Hujia(HJ), Xinli(XL) and Chenjia(CJ) sub-populations were allocated to the same cluster, while Baqiangzi(BQZ) sub-population was isolated. In summary, these data demonstrated that the crabs in the Liao River had high genetic diversity, but low genetic differentiation. Thus, the Liao River population had the potential for breeding selection. Furthermore, this study also provided valuable genetic information for the conservation of Chinese mitten crab.展开更多
将松浦红镜鲤(Cyprinus carpio Songpu red mirror)、散鳞镜鲤(Cyprinus carpio L.mirror)和荷包红鲤(Cyprinus carpio red var.Vuguanensis)抗寒品系乌仔各705尾放养到0.047hm^2池塘中,同塘培育到鱼种;春片鱼种各500尾放养到0.2hm^2池...将松浦红镜鲤(Cyprinus carpio Songpu red mirror)、散鳞镜鲤(Cyprinus carpio L.mirror)和荷包红鲤(Cyprinus carpio red var.Vuguanensis)抗寒品系乌仔各705尾放养到0.047hm^2池塘中,同塘培育到鱼种;春片鱼种各500尾放养到0.2hm^2池塘中;各池塘的投喂和饲养管理相同,按GB/T18654.2-2008和GB/T18654.3-2008标准测定鱼体质量和形态性状。结果显示,松浦红镜鲤体长/体高、体长/尾柄高、体长/头长、头长/吻长大于散鳞镜鲤和荷包红鲤抗寒品系;三个品种的8个可量比例性状主成分分析构建的3个主成分贡献率分别为:50.94%、17.08%、13.68%,累计贡献率达81.70%;主成分散点图显示,松浦红镜鲤聚成独立一簇,与其他品种明显区分;特定增重率、相对增重率、净增重、饲养成活率及越冬成活率等主要经济性状均显著高于荷包红鲤抗寒品系(P<0.05),但与散鳞镜鲤无明显差异。展开更多
基金Supported by Open Project Program of Key Laboratory of Freshwater Aquatic Biotechnology and Breeding,Ministry of Agriculture,Heilongjiang Fisheries Research Institute,Chinese Academy of Fishery Sciences(FBB2016-01)
文摘Chinese mitten crab(Eriocheir sinensis) is an indigenous and ecologically and economically important species in the Liao River area, but its identification and genetic diversity remain poorly understood. To evaluate the germplasm resources of this species, samples were collected from these locations: four sub-populations from the Liao River area and one population from the Yangtze River area; one primer was used to distinguish between the Liao River and the Yangtze River crabs. Thirteen loci were used for crab genetic diversity analysis, and basic statistics showed that the collecting samples were purebred in the Liao River area. The average observed heterozygosity(H_0) of the Liao River population was 0.5931, and the expected heterozygosity(H_e) was 0.8064. The polymorphism information content(PIC) was 0.7753, which showed that the Liao River population had high genetic diversity. The genetic differentiation index(F_(ST)) averaged 0.0342, meaning a low degree of differentiation; cluster analysis indicated that Hujia(HJ), Xinli(XL) and Chenjia(CJ) sub-populations were allocated to the same cluster, while Baqiangzi(BQZ) sub-population was isolated. In summary, these data demonstrated that the crabs in the Liao River had high genetic diversity, but low genetic differentiation. Thus, the Liao River population had the potential for breeding selection. Furthermore, this study also provided valuable genetic information for the conservation of Chinese mitten crab.
文摘将松浦红镜鲤(Cyprinus carpio Songpu red mirror)、散鳞镜鲤(Cyprinus carpio L.mirror)和荷包红鲤(Cyprinus carpio red var.Vuguanensis)抗寒品系乌仔各705尾放养到0.047hm^2池塘中,同塘培育到鱼种;春片鱼种各500尾放养到0.2hm^2池塘中;各池塘的投喂和饲养管理相同,按GB/T18654.2-2008和GB/T18654.3-2008标准测定鱼体质量和形态性状。结果显示,松浦红镜鲤体长/体高、体长/尾柄高、体长/头长、头长/吻长大于散鳞镜鲤和荷包红鲤抗寒品系;三个品种的8个可量比例性状主成分分析构建的3个主成分贡献率分别为:50.94%、17.08%、13.68%,累计贡献率达81.70%;主成分散点图显示,松浦红镜鲤聚成独立一簇,与其他品种明显区分;特定增重率、相对增重率、净增重、饲养成活率及越冬成活率等主要经济性状均显著高于荷包红鲤抗寒品系(P<0.05),但与散鳞镜鲤无明显差异。
