Inbreeding isn’t generally considered a good trait in any offspring, but bedbugs and a few other insects are pretty good at it.
Coby Schal at North Carolina State University studied the genetic diversity of bedbugs in US buildings. Interestingly, the diversity is so low that sometimes an entire buildings infestation can stem from one pregnant female.
Normally inbreeding leads to genetic defects hidden in the recessive genes of the parents. Bedbugs, along with cockroaches are the exception to the rule. Schal believes that some inbred populations may already be on their 70th generation. If that’s true, you can bet that many are far further along.
That puts a damper on using inbreeding as a weakness to kill them, but we already have some good common sense ways to avoid infestations anyway, like keeping your home clean and clutter-free. So it turns out, the vacuum may still be the best defense.