Inbreeding of cross-pollinated species leads to increase in

Inbreeding of cross-pollinated species leads to an increase in Homozygosity.
Homozygosity is the case where similar or identical alleles combine to express a trait that is not otherwise expressed (recessiveness). Inbreeding exposes recessive alleles through increasing homozygosity.
Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically.