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首页> 外文期刊>ICES Journal of Marine Science >Genetic evaluation of population structure in white marlin (Kajikia albida): the importance of statistical power
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Genetic evaluation of population structure in white marlin (Kajikia albida): the importance of statistical power

机译：白枪鱼（Kajikia albida）种群结构的遗传评价：统计能力的重要性

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摘要

The genetic basis of population structure in white marlin (Kajikia albida) is not well understood. Previous evaluation of genetic population structure in this species utilized a small number of molecular markers to survey genetic variation across opportunistically collected samples of adults, resulting in statistically significant levels of genetic differentiation for some pairwise comparisons and global levels of genetic differentiation that approached statistical significance. This study increased statistical power to improve resolution of genetic population structure in white marlin by surveying a larger number of molecular markers across sample collections of increased size, including collections from additional geographic locations and a robust collection of larvae. Increased statistical power resulted in lower levels of genetic heterogeneity compared with the previous study, and results were consistent with the presence of a single genetic stock of white marlin in the Atlantic Ocean. These results indicate that when statistical power is low, the ability to distinguish noise from a true signal of population structure is compromised. This relationship is especially important for population genetic assessments of marine fishes where genetic differentiation, if it exists, is expected to be low.
机译：白马林（Kajikia albida）种群结构的遗传基础尚不十分清楚。先前对该物种的遗传种群结构进行的评估使用少量的分子标记来调查机会性收集的成年样本中的遗传变异，从而导致统计学上的显着水平的遗传分化，从而进行成对比较，而遗传分化的总体水平接近统计学意义。这项研究通过调查大小增加的样本集合（包括来自其他地理位置的集合和幼虫的强大集合）中的大量分子标记，从而提高了统计能力，从而提高了白枪鱼遗传种群结构的分辨率。与以前的研究相比，增加的统计能力导致较低的遗传异质性水平，并且结果与大西洋中存在的单个马林鱼遗传种群相符。这些结果表明，当统计功效低时，区分噪声和真实种群结构信号的能力会受到损害。这种关系对于海洋鱼类的种群遗传评估特别重要，因为如果存在这种遗传分化，则该遗传分化将很低。

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