Genetics: Estimation of genetic differentiation measures

Description Usage Arguments Value References Examples

View source: R/spader.R


Genetics: Estimation allelic differentiation among subpopulations based on multiple-subpopulation genetics data. The richness-based indices include the classic Jaccard and Sorensen dissimilarity indices; the abundance-based indices include the conventional Gst measure, Horn, Morisita-Horn and regional species-differentiation indices.

Only Type (1) abundance data (datatype="abundance") is supported; input data for each sub-population include sample frequencies in an empirical sample of individuals. When there are multiple subpopulations, input data consist of an allele-by-subpopulation frequency matrix.


Genetics(X, q = 2, nboot = 200)



a matrix, or a data.frame of allele frequencies.


a specified order to use to compute pairwise dissimilarity measures. If q = 0, this function computes the estimated pairwise Jaccard and Sorensen dissimilarity indices. If q = 1, this function computes the estimated pairwise equal-weighted and size-weighted Horn indices; If q = 2, this function computes the estimated pairwise Morisita-Horn and regional species-diffrentiation indices.


an integer specifying the number of bootstrap replications.


a list of ten objects:

$info for summarizing data information.

$Empirical_richness for showing the observed values of the richness-based dis-similarity indices including the classic Jaccard and Sorensen indices.

$Empirical_relative for showing the observed values of the equal-weighted dis-similarity indices for comparing allele relative abundances including Gst, Horn, Morisita-Horn and regional differentiation measures.

$Empirical_WtRelative for showing the observed value of the dis-similarity index for comparing size-weighted allele relative abundances, i.e., Horn size-weighted measure based on Shannon-entropy under equal-effort sampling.

The corresponding three objects for showing the estimated dis-similarity indies are:
$estimated_richness, $estimated_relative and $estimated_WtRelative.

$pairwise and $dissimilarity.matrix for showing respectively the pairwise dis-similarity estimates (with related statistics) and the dissimilarity matrix for various measures depending on the diversity order q specified in the function argument.

$q for showing which diversity order q to compute pairwise dissimilarity.


Chao, A., and Chiu, C. H. (2016). Bridging the variance and diversity decomposition approaches to beta diversity via similarity and differentiation measures. Methods in Ecology and Evolution, 7, 919-928.

Chao, A., Jost, L., Hsieh, T. C., Ma, K. H., Sherwin, W. B. and Rollins, L. A. (2015). Expected Shannon entropy and Shannon differentiation between subpopulations for neutral genes under the finite island model. Plos One, 10:e0125471.

Jost, L. (2008). G_{ST} and its relatives do not measure differentiation. Molecular Ecology, 17, 4015-4026.


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# Type (1) abundance data 

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SpadeR documentation built on May 30, 2017, 8:12 a.m.