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On the use of the coefficient of variation to quantify and compare trait variation

机译:关于使用变异系数来量化和比较特质变异

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Meaningful comparison of variation in quantitative trait requires controlling for both the dimension of the varying entity and the dimension of the factor generating variation. Although the coefficient of variation (CV; standard deviation divided by the mean) is often used to measure and compare variation of quantitative traits, it only accounts for the dimension of the former, and its use for comparing variation may sometimes be inappropriate. Here, we discuss the use of the CV to compare measures of evolvability and phenotypic plasticity, two variational properties of quantitative traits. Using a dimensional analysis, we show that contrary to evolvability, phenotypic plasticity cannot be meaningfully compared across traits and environments by mean‐scaling trait variation. We further emphasize the need of remaining cognizant of the dimensions of the traits and the relationship between mean and standard deviation when comparing CVs, even when the scales on which traits are expressed allow meaningful calculation of the CV.
机译:定量特征的变化的有意义的比较需要控制变化实体的尺寸和因子产生变化的尺寸。虽然变异系数(CV;标准偏差除以平均值),但通常用于测量和比较定量性状的变化,它仅占前者的维度,并且其用于比较变化的用途有时可能是不合适的。在这里,我们讨论CV的使用以比较进化性和表型可塑性的测量,定量性状的两个变分性。使用尺寸分析,我们表明,通过平均缩放特质变异,不能在特征和环境中有意义地比较表型可塑性。我们进一步强调需要在比较CV时依赖于特征的尺寸和平均值和标准偏差之间的关系,即使表达特征的尺度允许有意义的CV计算。

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