基于线粒体控制区序列的花斑蛇鲻遗传多态性分析

doi:10.11978/2019115

Abstract

Abstract:

The Brushtooth lizardfish (Saurida undosquamis) is one of the economically important demersal fishes. The population genetic structure and genetic diversity of S. undosquamis from the coast of China were examined based on the complete control region (D-loop) sequences. A total of 129 individuals from six geographic populations were sequenced. Seventy-one polymorphic sites were detected, which defined 101 haplotypes. Results show S. undosquamis from the coast of China are characterized by quite high haplotype diversity (0.9873 ± 0.0048) and relative low nucleotide diversity (0.0132 ± 0.0067). Phylogenetic tree for haplotypes based on Neighbour-joining method shows shallow topology and reveals no significant divergent clades. Haplotypes from each geographic population were scattered throughout the NJ tree, showing no significant genetic differentiation between populations. Analyses of molecular variance suggest nearly all the genetic variation (99.87%) is attributed to variability within populations, while little variations (0.13%) are found between populations. Most of the pairwise F_STvalues between different populations are quite low, which implies a high rate of gene flow and genetic homogeneity between populations. The results demonstrate high genetic diversity and little genetic differentiation for S. undosquamis from the coast of China. They belong to the same population (panmixia), and a single-stock management regime could be supported in fishery management.

Key words: lizardfish, demersal fishes, fisheries management, genetic structure, genetic diversity

CLC Number:

P735

Min LI, Xiaolan KONG, Youwei XU, Zuozhi CHEN. Genetic polymorphism of the Brushtooth lizardfish Saurida undosquamis based on mitochondrial D-loop sequences[J].Journal of Tropical Oceanography, 2020, 39(4): 42-49.

Figures/Tables 6

Fig. 1

Tab. 1

Fig. 2

Tab. 2

Tab. 3

Tab. 4

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地理群体(缩写)	采样点位置	样本量/个	单倍型数量/个	单倍型多样性(h±SD)	核苷酸多样性(π±SD)
防城港(FCG)	108°30'E, 21°00'N	21	19	0.9905 ± 0.0178	0.0110 ± 0.0058
三亚(SY)	109°46'E, 17°58'N	22	21	0.9957 ± 0.0153	0.0148 ± 0.0077
海口(HK)	111°18'E, 20°18'N	22	21	0.9957 ± 0.0153	0.0135 ± 0.0071
珠海(ZH)	114°05'E, 21°41'N	21	20	0.9952 ± 0.0165	0.0142 ± 0.0074
汕头(ST)	116°55'E, 23°00'N	22	19	0.9827 ± 0.0208	0.0129 ± 0.0068
泉州(QZ)	119°02'E, 24°36'N	21	21	1.0000 ± 0.0147	0.0128 ± 0.0068
总计	/	129	101	0.9873 ± 0.0048	0.0132 ± 0.0067

变异来源	自由度(无量纲)	变异百分比/%	分化指数(F_st)
群体间	5	0.13	/	/
群体内	123	99.87	/	/
所有样本	128	/	0.0013	0.3992

	FCG	SY	HK	ZH	ST	QZ
FCG		0.0773	0.0707	0.0202	0.1060	0.1605
SY	0.0269		0.9300	0.6829	0.8408	0.7405
HK	-0.0267	-0.0211		0.7952	0.9263	0.8341
ZH	0.0478	-0.0126	-0.0155		0.9421	0.2658
ST	-0.0506	-0.0176	-0.0204	-0.0238		0.3424
QZ	0.0164	-0.0155	-0.0178	0.0071	0.0017

	FCG	SY	HK	ZH	ST
SY	0.0146
HK	0.0351	0.7368
ZH	0.2855	0.2921	0.1818
ST	0.3906	0.7042	0.8730	0.6746
QZ	0.5270	0.3033	0.4864	0.3926	0.9453

Genetic polymorphism of the Brushtooth lizardfish Saurida undosquamis based on mitochondrial D-loop sequences

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