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利用微卫星标记分析阿根廷滑柔鱼(Illex argentinus)冬生群体与秋生群体的遗传变异性,并检验冬生群体在时间上的遗传差异。结果表明,7个位点平均等位基因数为23.14,平均有效等位基因数为10.43,各位点均为高度多态性位点(PIC=0.590～0.931)。3个群体显示出较高的遗传多样性水平(Ho=0.796～0.904)。两两群体间的Fst值以及AMOVA分析表明,群体遗传分化不显著(Fst=0.008 3,P>0.05);阿根廷滑柔鱼冬生与秋生2个群体间及冬生群体在时间上的遗传差异不显著。基于Nei’s遗传距离构建的UPGMA聚类树显示,冬生群体2个群体聚在一起。阿根廷滑柔鱼为大型洄游性种类,不同产卵群体有可能在生殖洄游过程中发生混合并进行基因交流,从而表现出遗传同质性。
Microsatellite markers were used to analyze the genetic variability of winter and autumn populations of Illex argentinus and to examine the temporal differences in the population of winter sows. The results showed that the average number of alleles at 7 loci was 23.14, the average number of effective alleles was 10.43, and all loci were highly polymorphic (PIC = 0.590 ~ 0.931). Three groups showed a higher level of genetic diversity (Ho = 0.796 ~ 0.904). The Fst value and AMOVA analysis showed that the genetic differentiation was not significant (Fst = 0.008 3, P> 0.05) between two groups. The genetic differences in the temporal distributions between two populations Not obvious. UPGMA clustering trees based on Nei’s genetic distance showed that two populations of winter-winged populations clustered together. Argentinian slippery fish is a large migratory species, and different spawning populations are likely to be mixed and genetically communicated during reproductive migratory processes, thus showing genetic homogeneity.