workers. Therefore, microsatellite index, which
is probability and ranges from 0 to 1, was logittransformed,
to better meet the assumptions of
linear regression. There was highly significant
correlation between morphometric index and
logit-transformed microsatellite index, both at
the level of individual and colony level (Fig. 2a,
b). As expected, the relationship was stronger at
colony level—the proportion of the total variation
that was explained by the models equalled
0.50 for individuals and 0.74 for colonies.