Importance :
(i) increases homozygosity which is necessary to evolve pure line in any organsim.
(ii) helps to evolve pure line
(iii) helps to expose harmful recessive genes
(iv) helps in accumulation of superior genes
Limitation :
It reduces the fertility and also the productivity of an animal.
Continuous inbreeding among cattle causes inbreeding depression. It decreases the fertility and, even, productivity of an animal. It can be overcome by applying outbreeding, in which mating is done between different breeds or individuals of the same breed but having no common ancestors. Outbreeding includes out-crossing, cross-breeding and interspecific hybridisation.
