The sand lizard is a species of conservation concern in Sweden. It's populations are small and fragmented with low genetic diversity. A genetic rescue experiment has established an admixed population via cross-breeding of several sand lizard populations. I study the consequences of the genetic rescue for genome-wide diversity and the functionally important immunogenetic diversity. For this, I focus on three populations: the admixed population, its main founder population that suffered from inbreeding depression, and a population in its vicinity that does not show such signs.