Table 1. Summary characteristics describing genetic diversity assessed using microsatellites in the three data sets, in each case separately for diploids, hexaploids and for the total data set.

	Mixed-ploidy population			Contact zone			Europe
	2x	6x	Combined	2x	6x	Combined	2x	6x	Combined
TA	28	96	104	90	129	160	98	150	179
FIS (±s.e.)	−0.045±0.11	−0.232±0.12*	−0.0371±0.02s	−0.080±−0.11s	−0.099±0.02*	−0.002±0.05	−0.035±0.07	−0.154±0.03*	−0.013±0.003
HE	0.642	0.762	0.786	0.816	0.834	0.886	0.803	0.837	0.882
Ho	0.671	0.939	0.815	0.881	0.917	0.887	0.83	0.97	0.89
HT	NA	NA	0.786	0.816	0.834	0.886	0.803	0.837	0.882
Hs	NA	NA	0.702	0.753	0.827	0.825	0.697	0.815	0.820
DST	NA	NA	0.084	0.063	0.007	0.061	0.106	0.022	0.062
Rho (±s.e.)	NA	NA	0.511±0.07*	0.182±0.03*	0.115±0.03*	0.292±0.05*	0.257±0.03*	0.177±0.02*	0.347±0.03*
AMOVA
Among regions	NA	NA	NA	NA	NA	0%	NA	NA	NA
Among cytotypes	NA	NA	31%*	NA	NA	26%*	NA	NA	22%*
Among populations	NA	NA	NA	17%*	14%*	11%*	24%*	18%*	16%*
Within populations	NA	NA	69%*	83%*	86%*	63%*	76%*	82%*	62%*

Abbreviations: AMOVA, analysis of molecular variance; D_ST, genetic diversity among populations; F_IS, inbreeding coefficient; H_E, expected heterozygosity; Ho, observed heterozygosity; Hs, mean genetic diversity within populations; H_T, total gene diversity; NA, not applicable; TA, total number of alleles.

Values of F_IS and Rho, significantly deviating from 0, are marked by *. Also shown are the proportions of genetic variation in the data set at each hierarchical level as assessed by AMOVA; again those significantly deviating from 0 are marked by *. In the mixed-ploidy population, the ‘populations' in the table are groups of diploid and group of hexaploid individuals.