Appalachian Trechus of the vandykei Group 
141 
Table 3. Genetic variability at eight enzymatic loci for five subgroups of the 
Trechus vandykei species group. 
Population 
N a 
P b 
Observed 
H c 
Expected 
CG 
27.8 
bowlingi 
0.25 
0.123 
0.150 
HE 
16.0 
0.25 
0.095 
0.095 
RC 
6.3 
0.25 
0.029 
0.1 17 
WP 
25.0 
0.25 
0.056 
0.124 
Mean 
0.25 
0.076 
0.122 
HA 
21.9 
haoe 
0.25 
0.059 
0.075 
BG 
15.8 
pisgahensis 
0.125 
0.015 
0.014 
BP 
13.6 
0.0 
0.0 
0.0 
DG 
9.5 
0.0 
0.0 
0.0 
MP 
15.1 
0.125 
0.018 
0.017 
SM 
17.4 
0.125 
0.023 
0.034 
WH 
12.9 
0.0 
0.0 
0.0 
Mean 
0.063 
0.009 
0.011 
CH 
15.5 
tusquitee 
0.25 
0.117 
0.134 
TU 
26.8 
0.25 
0.102 
0.1 13 
Mean 
0.25 
0.110 
0.124 
BA 
25.5 
vandykei 
0.25 
0.096 
0.087 
BB 
27.9 
0.25 
0.075 
0.083 
CC 
32.5 
0.25 
0.056 
0.055 
MM 
37.3 
0.25 
0.083 
0.093 
SN 
14.4 
0.25 
0.090 
0.086 
UN 
9.9 
0.25 
0.056 
0.078 
Mean 
0.25 
0.076 
0.080 
a Mean sample size per locus. 
^Proportion of polymorphic loci per population. 
c Average proportion of heterozygous loci per individual. 
