以辽河、大洋河及鸭绿江3个水系的75尾刀鲚( Coilia nasus)为试验材料,利用PCR扩增和测序技术研究了3个刀鲚群体的遗传结构。获得的1130~1171 D-loop同源序列中检测出94变异位点和60个单倍型,总群体单倍型和核苷酸多样性指数分别为0.992 ± 0.004和0.010 ± 0.000。分子方差分析(AMOVA)结果表明,98.27%遗传变异来自群体内,群体间遗传分化较小,单倍型聚类分析和网络图显示单倍型分布没有明显的地理谱系结构,3个群体可作为一个遗传管理单元。该结果可为刀鲚的种质资源保护提供参考。 The genetic structure of Coilia nasus was studied based on the sequences analysis of mitochondrial D-loop in 75 individuals from Liao River (n = 20), Dayang River (n = 27) and Yalu River (n = 28), Liaoning province. In 1130~1171 bp of D-loop sequences, there were 94 polymorphic sites and 60 haplotypes. The haplotype and nucleotide diversities were 0.992 ± 0.004 and 0.010 ± 0.000, respectively. AMOVA revealed 98.27% of the total variation was resulted from intra-population differentiation, there was little genetic differentiation among populations. Both NJ tree and MJ network of 60 haplotypes indicated there was no geographic structure among populations. Three populations of C. nasus should be considered as a genetic management unit. The findings may be very useful to protect this species stock.
刀鲚,D-loop,遗传结构,辽河,大洋河,鸭绿江, Coilia nasus
D-loop
Genetic Structure
Liao River
Dayang River
Yalu River
摘要
The genetic structure of Coilia nasus was studied based on the sequences analysis of mitochondrial D-loop in 75 individuals from Liao River (n = 20), Dayang River (n = 27) and Yalu River (n = 28), Liaoning province. In 1130~1171 bp of D-loop sequences, there were 94 polymorphic sites and 60 haplotypes. The haplotype and nucleotide diversities were 0.992 ± 0.004 and 0.010 ± 0.000, respectively. AMOVA revealed 98.27% of the total variation was resulted from intra-population differentiation, there was little genetic differentiation among populations. Both NJ tree and MJ network of 60 haplotypes indicated there was no geographic structure among populations. Three populations of C. nasus should be considered as a genetic management unit. The findings may be very useful to protect this species stock.
Keywords:Coilia nasus, D-loop, Genetic Structure, Liao River, Dayang River, Yalu River
胡宗云,杨培民,张 健,王建军. 基于线粒体D-loop序列的辽宁刀鲚三个群体遗传分析Genetic Structure Analysis of Three Wild Populations of Coilia nasus in Liaoning Province Based on Mitochondrial D-loop Sequences[J]. 水产研究, 2021, 08(04): 165-174. https://doi.org/10.12677/OJFR.2021.84020
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