利用12对微卫星分子标记对大菱鲆Scophthalmus maximus 4个引进地理群体进行遗传多样性分析。结果表明,等位基因数(A)为2~10个,平均等位基因数为4.3,有效等位基因数(Ne)为1.6~6.1,平均有效等位基因数为2.7,各位点的杂合度观测值(H...利用12对微卫星分子标记对大菱鲆Scophthalmus maximus 4个引进地理群体进行遗传多样性分析。结果表明,等位基因数(A)为2~10个,平均等位基因数为4.3,有效等位基因数(Ne)为1.6~6.1,平均有效等位基因数为2.7,各位点的杂合度观测值(Ho)为0.0000~0.5625,杂合度期望值(He)为0.3823~0.8416。各群体之间无偏倚杂合度期望值由小到大依次为丹麦群体、英国群体、法国群体、挪威群体,运用SPSS软件对无偏倚杂合度期望值进行Kruskal-Wallis检验,其结果(H=4.438,df=3,P=0.218)表明,4个群体的遗传多样性差异不显著。群体间平均遗传分化指数(Fst)为0.1117,各群体之间存在中度遗传分化。用UPGMA法进行聚类分析,4个群体聚为两类,挪威群体和丹麦群体聚为一类,法国群体和英国群体聚为一类。结合Hardy-Weinberg平衡和遗传偏离指数(d),4个群体都不同程度的偏离平衡。4个群体具有一定的遗传分化、较好的遗传多样性,适合作为大规模家系选育的基础群体。展开更多
在相同的养殖条件下,选取英国、法国、丹麦和挪威4个不同群体的大菱鲆Scophthalmus maximus L.,进行了1年生长性能的比较。结果表明,在3、6、9和12月龄,群体间体长和体重的差异均较大,在每一个生长时期各群体体长和体重的差异排...在相同的养殖条件下,选取英国、法国、丹麦和挪威4个不同群体的大菱鲆Scophthalmus maximus L.,进行了1年生长性能的比较。结果表明,在3、6、9和12月龄,群体间体长和体重的差异均较大,在每一个生长时期各群体体长和体重的差异排序相同。4个群体的大菱鲆体长以线性速度生长,体重以指数形式生长。综合0~3月龄、0~12月龄的绝对增重率和3~6、6~9、9~12月龄的绝对增重率和瞬时增重率,在生长速度上依次为法国、英国、丹麦和挪威群体,在生长差异上丹麦和挪威及英国和法国之间的差异较小,丹麦、挪威和英国、法国之间的差异较大。大菱鲆各群体在3、6、9和12月龄的体重变异系数分别为22.84%~33.48%、21.36%~30.30%、19.64%~26.97%和21.06%~35.07%,认为这4个群体的大菱鲆均可作为选育的基础群体。展开更多
Turbot(Scophthalmus maximus) is a flatfish species commercially important for aquaculture.In this study,we generated a microsatellite-enriched genomic DNA library for Scophthalmus maximus,and then isolated and charact...Turbot(Scophthalmus maximus) is a flatfish species commercially important for aquaculture.In this study,we generated a microsatellite-enriched genomic DNA library for Scophthalmus maximus,and then isolated and characterized 45 microsatellite loci by genotyping 30 individuals.The observed number of alleles ranged from 2 to 19 with an average of 6.24,while the effective number of alleles ranged from 1.30 to 11.11 with an average of 3.66.The expected heterozygosities varied from 0.235 to 0.925 4 and polymorphic information content ranged from 0.204 4 to 0.903 3,with an average of 0.622.Twelve loci deviated significantly from Hardy-Weinberg equilibrium,and no significant linkage disequilibrium was observed between any pair of loci after Bonferroni correction.In cross-species amplification,five flatfish species(Paralichthys lethostigma,Verasper moseri,platichthys stellatus,Hippoglossoides dubius and Cynoglossus semilaevis) showed at least one polymorphic locus.These polymorphic microsatellite loci should prove useful for population analysis of turbot and other related species.展开更多
文摘利用12对微卫星分子标记对大菱鲆Scophthalmus maximus 4个引进地理群体进行遗传多样性分析。结果表明,等位基因数(A)为2~10个,平均等位基因数为4.3,有效等位基因数(Ne)为1.6~6.1,平均有效等位基因数为2.7,各位点的杂合度观测值(Ho)为0.0000~0.5625,杂合度期望值(He)为0.3823~0.8416。各群体之间无偏倚杂合度期望值由小到大依次为丹麦群体、英国群体、法国群体、挪威群体,运用SPSS软件对无偏倚杂合度期望值进行Kruskal-Wallis检验,其结果(H=4.438,df=3,P=0.218)表明,4个群体的遗传多样性差异不显著。群体间平均遗传分化指数(Fst)为0.1117,各群体之间存在中度遗传分化。用UPGMA法进行聚类分析,4个群体聚为两类,挪威群体和丹麦群体聚为一类,法国群体和英国群体聚为一类。结合Hardy-Weinberg平衡和遗传偏离指数(d),4个群体都不同程度的偏离平衡。4个群体具有一定的遗传分化、较好的遗传多样性,适合作为大规模家系选育的基础群体。
文摘在相同的养殖条件下,选取英国、法国、丹麦和挪威4个不同群体的大菱鲆Scophthalmus maximus L.,进行了1年生长性能的比较。结果表明,在3、6、9和12月龄,群体间体长和体重的差异均较大,在每一个生长时期各群体体长和体重的差异排序相同。4个群体的大菱鲆体长以线性速度生长,体重以指数形式生长。综合0~3月龄、0~12月龄的绝对增重率和3~6、6~9、9~12月龄的绝对增重率和瞬时增重率,在生长速度上依次为法国、英国、丹麦和挪威群体,在生长差异上丹麦和挪威及英国和法国之间的差异较小,丹麦、挪威和英国、法国之间的差异较大。大菱鲆各群体在3、6、9和12月龄的体重变异系数分别为22.84%~33.48%、21.36%~30.30%、19.64%~26.97%和21.06%~35.07%,认为这4个群体的大菱鲆均可作为选育的基础群体。
基金Supported by the Fund for Modern Agro-Industry Technology Research System (No. nycytx-50)the National Sustainability Plan of China (No. 2006BAD01A12012)+1 种基金the Agriculture Commonwealth Scientific Research Plan (No. nyhyzx07-046)the Yellow Sea Fisheries Research Institute Scientific and Research Fund (No. 2009-ts-11)
文摘Turbot(Scophthalmus maximus) is a flatfish species commercially important for aquaculture.In this study,we generated a microsatellite-enriched genomic DNA library for Scophthalmus maximus,and then isolated and characterized 45 microsatellite loci by genotyping 30 individuals.The observed number of alleles ranged from 2 to 19 with an average of 6.24,while the effective number of alleles ranged from 1.30 to 11.11 with an average of 3.66.The expected heterozygosities varied from 0.235 to 0.925 4 and polymorphic information content ranged from 0.204 4 to 0.903 3,with an average of 0.622.Twelve loci deviated significantly from Hardy-Weinberg equilibrium,and no significant linkage disequilibrium was observed between any pair of loci after Bonferroni correction.In cross-species amplification,five flatfish species(Paralichthys lethostigma,Verasper moseri,platichthys stellatus,Hippoglossoides dubius and Cynoglossus semilaevis) showed at least one polymorphic locus.These polymorphic microsatellite loci should prove useful for population analysis of turbot and other related species.