Measuring differentiation among populations at different levels of genetic integration

BMC Genomic Data

Table 1 Genetic differentiation among four oak stands at three levels of genetic integration.

Genetic differentiation among stands for three levels of integration
Level of integration	Genetic distance between stands				Components of the differentiation snail
Gene-pool (GP)	Δ	R	B	S	Δ_R	0.137
	B	0.158			Δ_B	0.129
	S	0.182	0.163		Δ_S	0.148
	E	0.157	0.172	0.171	Δ_E	0.143
Mean	0.167				Δ_SD	0.139
Single-locus diplophase (SLD)	Δ	R	B	S	Δ_R	0.208
	B	0.226			Δ_B	0.185
	S	0.261	0.234		Δ_S	0.224
	E	0.217	0.222	0.234	Δ_E	0.186
Mean	0.232 [0.214, 0.235] 0.004 ↑ **				Δ_SD	0.200 [0.184, 0.203] 0.002 ↑ **
Multilocus diplophase (MLD)	Δ	R	B	S	Δ_R	0.501
	B	0.510			Δ_B	0.495
	S	0.540	0.531		Δ_S	0.523
	E	0.502	0.503	0.522	Δ_E	0.487
Mean	0.518 [0.507, 0.521] 0.005 ↑ **				Δ_SD	0.502 [0.489, 0.505] 0.006 ↑ **
Covariation of genetic differentiation between integration levels
Comparison	Genetic distances				Differentiation snail
GP vs. SLD	0.893 [0.421, 0.988] 0.270 n.s.				0.809 [0.545, 1.000] 0.912 n.s.
SLD vs. MLD	1.000 [0.742, 1.000] 0.084 n.s.				0.995 [0.868, 1.000] 0.532 n.s.
GP vs. MLD	0.720 [0.395, 0.954] 0.799 n.s.				0.657 [0.376, 1.000] 0.965 ↓ *

For four stands (abbr. R, B, S, and E) of pedunculate oak in north-central Germany scored at six nuclear microsatellite loci, genetic differentiation based on the elementary genic difference between genetic types was calculated at three levels of genetic integration: gene-pool, single-locus diplophase, and multilocus diplophase. The observed genetic distance Δ between each pair of stands and the observed distance Δ_j(component of differentiation snail) of each stand j from its complement are listed together with their respective means. To assess the effect of integration level on patterns of differentiation, the lower part of the table shows the covariation between integration levels of the pairwise genetic distances Δ and of the snail components Δ_j. To compare the observed distances with those obtainable if the genes were randomly arranged, 10 000 data sets were generated by random permutation of the genes at each locus within (not among) all stands. Square brackets enclose the ranges [min, max] of 10 000 distances by permutation, followed by the P-values (i.e., proportion of permutations yielding distances equal to or greater than the observed distance). Symbols ↑ ** and ↓ * indicate that fewer than 1% and more than 95%, respectively, of the permutations yielded distances equal to or greater than the observed distance

ISSN: 2730-6844