The genetic differences of 15 mitten crab populations from 6 river systems in China's Mainland and 1 population from Russia were studied based on RFLP analysis of mitochondrial cytochrome oxidase subunit I （CO I...The genetic differences of 15 mitten crab populations from 6 river systems in China's Mainland and 1 population from Russia were studied based on RFLP analysis of mitochondrial cytochrome oxidase subunit I （CO I）. The results showed that Tas I-RFLP pattern could be used as a genetic marker to distinguish Eriocheir hepuensis from Eriocheir sinensis, Eriocheirjaponica and Eriocheir leptognathus; genetic distances among 13 populations of Eriocheir sinensis range from 0 to 0.015, indicating that they were different geographic strains; the subspecies status of Eriocheir sinensis and Eriocheir hepuensis （population from Nanliujiang） were considered owning to their genetic distances of 0.02-0.044, indicating that genetic divergence between them was low; Eriocheir leptognathus （population from Nanpaihe, Tianjin） was the most distant taxon with genetic distances value of 0.147-0.195, which could be defined as genetic distances between species in genus Eriocheir.展开更多
本试验旨在研究普通棉籽粕(CSM)和发酵棉籽粕(FCSM)替代鱼粉对中华绒螯蟹(Eriocheir sinensis)幼蟹生长性能、体成分和肝胰腺消化酶活性的影响。选用初始均重为(0.56±0.04)g的中华绒螯蟹幼蟹660只,随机分成11组,每组3个重复,每个重...本试验旨在研究普通棉籽粕(CSM)和发酵棉籽粕(FCSM)替代鱼粉对中华绒螯蟹(Eriocheir sinensis)幼蟹生长性能、体成分和肝胰腺消化酶活性的影响。选用初始均重为(0.56±0.04)g的中华绒螯蟹幼蟹660只,随机分成11组,每组3个重复,每个重复20只。配制CSM添加量分别为0、8.0%、16.0%、24.0%、32.0%、40.0%(分别记为CSM0、CSM8、CSM16、CSM24、CSM32、CSM40组)和FCSM添加量分别为8.0%、16.0%、24.0%、32.0%、47.5%(分别记为FCSM8、FCSM16、FCSM24、FCSM32、FCSM47.5组)的11种等氮(粗蛋白质,38.39%)等能(总能,19.18 M J/kg)试验饲料。试验期为6周。结果表明:CSM8、CSM16、FCSM8、FCSM16、FCSM24组的增重率、特定生长率、成活率与对照组(CSM0组)差异不显著(P>0.05)。CSM8、FCSM8、FCSM16、FCSM24组的全蟹粗蛋白质含量与对照组亦无显著差异(P>0.05)。饲料中CSM添加量超过16%或FCSM添加量超过24%时,增重率、特定生长率、成活率和全蟹粗蛋白质含量显著低于对照组(P<0.05)。不同水平的CSM和FCSM替代鱼粉对全蟹水分、粗脂肪、粗灰分含量以及肝胰腺脂肪酶活性的影响均不显著(P>0.05)。随着CSM或FCSM替代水平的升高,肝胰腺胃蛋白酶和胰蛋白酶活性逐渐下降,而淀粉酶和纤维素酶活性则逐渐升高。在相同替代水平下,FCSM组的胃蛋白酶和胰蛋白酶活性均不同程度地高于CSM组,而FCSM组的纤维素酶活性则显著低于CSM组(P<0.05)。由此得出,作为中华绒螯蟹幼蟹饲料中鱼粉的替代蛋白质源时,CSM的适宜添加量为16%,FCSM的适宜添加量为24%。此外,相同替代水平下FCSM的替代效果好于CSM。展开更多
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 evaluat...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 （H0） of the Liao River population was 0.5931, and the expected heterozygosity （He） 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 （FST） 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
基金Tianjin Development Foundation of Science and Technology and International Cooperation Foundation(033803511,033803511G)Tianjin Higher Educational Development Foundation(2004BA31)
文摘The genetic differences of 15 mitten crab populations from 6 river systems in China's Mainland and 1 population from Russia were studied based on RFLP analysis of mitochondrial cytochrome oxidase subunit I （CO I）. The results showed that Tas I-RFLP pattern could be used as a genetic marker to distinguish Eriocheir hepuensis from Eriocheir sinensis, Eriocheirjaponica and Eriocheir leptognathus; genetic distances among 13 populations of Eriocheir sinensis range from 0 to 0.015, indicating that they were different geographic strains; the subspecies status of Eriocheir sinensis and Eriocheir hepuensis （population from Nanliujiang） were considered owning to their genetic distances of 0.02-0.044, indicating that genetic divergence between them was low; Eriocheir leptognathus （population from Nanpaihe, Tianjin） was the most distant taxon with genetic distances value of 0.147-0.195, which could be defined as genetic distances between species in genus Eriocheir.
文摘本试验旨在研究普通棉籽粕(CSM)和发酵棉籽粕(FCSM)替代鱼粉对中华绒螯蟹(Eriocheir sinensis)幼蟹生长性能、体成分和肝胰腺消化酶活性的影响。选用初始均重为(0.56±0.04)g的中华绒螯蟹幼蟹660只,随机分成11组,每组3个重复,每个重复20只。配制CSM添加量分别为0、8.0%、16.0%、24.0%、32.0%、40.0%(分别记为CSM0、CSM8、CSM16、CSM24、CSM32、CSM40组)和FCSM添加量分别为8.0%、16.0%、24.0%、32.0%、47.5%(分别记为FCSM8、FCSM16、FCSM24、FCSM32、FCSM47.5组)的11种等氮(粗蛋白质,38.39%)等能(总能,19.18 M J/kg)试验饲料。试验期为6周。结果表明:CSM8、CSM16、FCSM8、FCSM16、FCSM24组的增重率、特定生长率、成活率与对照组(CSM0组)差异不显著(P>0.05)。CSM8、FCSM8、FCSM16、FCSM24组的全蟹粗蛋白质含量与对照组亦无显著差异(P>0.05)。饲料中CSM添加量超过16%或FCSM添加量超过24%时,增重率、特定生长率、成活率和全蟹粗蛋白质含量显著低于对照组(P<0.05)。不同水平的CSM和FCSM替代鱼粉对全蟹水分、粗脂肪、粗灰分含量以及肝胰腺脂肪酶活性的影响均不显著(P>0.05)。随着CSM或FCSM替代水平的升高,肝胰腺胃蛋白酶和胰蛋白酶活性逐渐下降,而淀粉酶和纤维素酶活性则逐渐升高。在相同替代水平下,FCSM组的胃蛋白酶和胰蛋白酶活性均不同程度地高于CSM组,而FCSM组的纤维素酶活性则显著低于CSM组(P<0.05)。由此得出,作为中华绒螯蟹幼蟹饲料中鱼粉的替代蛋白质源时,CSM的适宜添加量为16%,FCSM的适宜添加量为24%。此外,相同替代水平下FCSM的替代效果好于CSM。
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 （H0） of the Liao River population was 0.5931, and the expected heterozygosity （He） 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 （FST） 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.
