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Table 2 Long's test for heterogeneity of admixture rates

From: Rapid fixation of non-native alleles revealed by genome-wide SNP analysis of hybrid tiger salamanders

Pond n M F LS X2 (63 df) X2 (60 df) X2 (59 df)
Bluestone 41 0.591 0.041 588.4 *** 26.1  
Melindy 55 0.095 0.486 1120.5 *** 31.1  
Pond H 51 0.621 0.094 412.5 *** 61.4  
Sycamore 56 0.306 0.108 1786.7 *** 23.6  
Toro 52 0.518 0.148 1058.6 *** 414.8 *** 53.3
  1. Sample size (n), mean admixture proportion (M = introduced allele frequency across all markers), standardized variance of the introduced allele frequencies among markers within samples (F LS – analogous to F ST among subpopulations within a metapopulation [30]), and Long's test statistic for goodness-of-fit to the null hypothesis of neutral admixture (accounting for variation owing to drift). The test with 63 df includes all markers, the test with 60 df eliminated the three most introgressed markers (E06E11, E12C11, and E23C06), and the test with 59 df also eliminated mtDNA (Toro only). *** P << 0.0001