Genetic variations and population structure in three populations of beardless barb, Cyclocheilichthys apogon (Valenciennes, 1842) inferred from mitochondrial cytochrome b sequences

IF 1.1 4区生物学 Q4 GENETICS & HEREDITY Mitochondrial Dna Part a Pub Date : 2018-01-02 DOI:10.1080/24701394.2016.1242581

Anan Kenthao, P. Wangsomnuk, P. Jearranaiprepame

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引用次数: 4

Abstract

Abstract This study aimed to investigate the relation of dispersal barrier and genetic diversity, population structure, and demographic history of 46 samples of beardless barb, Cyclocheilichthys apogon (Valenciennes, 1842) collected from three different locations in North-eastern Thailand. The analysis of molecular variance (AMOVA) was employed in order to determine the genetic variability within and among populations of this fish. The neutrality tests and mismatch distribution analysis were additionally applied to assess the neutrality and demographic expansion of the populations, respectively. Contiguous sequences within range from 1100 to1140 bp were obtained with varying 16 different haplotypes with high-haplotype diversity (0.8773 ± 0.0327) and low-nucleotide diversity (0.00215 ± 0.00020). The variations within and among populations accounted for 98.98 and 1.02% of the total variation, respectively. The low level of pairwise Fst estimations indicated a possible gene flow among populations and a suggestion of genetic homogeneity at this geographical range. A supportive idea of having a single-maternal lineage and past demographic expansion or selection experiencing has distinctly appeared among these populations. The current data suggests that all three populations distinctly exist as a single stock unit and that is an important factor in identifying genetic variation of C. apogon in this geographical area to be used in establishing effective plans and strategies for a conservation and management.

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根据线粒体细胞色素b序列推断的三个无须barb, Cyclocheilichthys apogon (valencienne, 1842)群体的遗传变异和群体结构

摘要本研究旨在探讨在泰国东北部3个不同地点采集的46份无须刺，Cyclocheilichthys apogon (Valenciennes, 1842)的传播屏障与遗传多样性、种群结构和人口统计学历史的关系。采用分子变异分析(AMOVA)来确定该鱼种群内和种群间的遗传变异。此外，中性检验和错配分布分析分别用于评估人口的中性和人口扩张。在1100 ~ 1140 bp范围内获得了16种不同单倍型的连续序列，高单倍型多样性为0.8773±0.0327，低单倍型多样性为0.00215±0.00020。种群内变异和种群间变异分别占总变异的98.98%和1.02%。低水平的成对Fst估计表明种群之间可能存在基因流动，表明该地理范围内存在遗传同质性。在这些人群中明显出现了一种支持性的观点，即具有单母血统和过去的人口扩张或选择经历。目前的资料表明，这3个种群明显是作为一个种群单位存在的，这是确定该地理区域阿格龙遗传变异的重要因素，可用于制定有效的保护和管理计划和策略。

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来源期刊

Mitochondrial Dna Part a Biochemistry, Genetics and Molecular Biology-Genetics

CiteScore

3.00

自引率

0.00%

发文量

期刊介绍： Mitochondrial DNA Part A publishes original high-quality manuscripts on physical, chemical, and biochemical aspects of mtDNA and proteins involved in mtDNA metabolism, and/or interactions. Manuscripts on cytosolic and extracellular mtDNA, and on dysfunction caused by alterations in mtDNA integrity as well as methodological papers detailing novel approaches for mtDNA manipulation in vitro and in vivo are welcome. Descriptive papers on DNA sequences from mitochondrial genomes, and also analytical papers in the areas of population genetics, phylogenetics and human evolution that use mitochondrial DNA as a source of evidence for studies will be considered for publication. The Journal also considers manuscripts that examine population genetic and systematic theory that specifically address the use of mitochondrial DNA sequences, as well as papers that discuss the utility of mitochondrial DNA information in medical studies and in human evolutionary biology.