Table 1 Search strings used to query online databases

i. Inbreeding related strings

“In*breeding coefficient$”

“Cost$ of in*breeding”

(inbred SAME mating*) NOT ((“Quantitative trait loc*”)OR(QTL*))

(inbred SAME (offspring OR progeny))

Selfed SAME out*

“Optimal outcrossing” OR “Outcrossing distance”

“Benefit* of dispersal”

“Cost* of dispersal”

(“Natal dispersal” AND (inbred OR in*breeding OR heterosis OR self* OR fitness))

(Philopatr* AND (inbred OR in*breeding OR heterosis OR self* OR fitness))

ii. Fitness related strings

(Heterosis AND in*breeding)

(Depression SAME in*bre*)

(Depression SAME fitness)

“Genetic load”