Genetic crosses of rodent malaria parasites are performed by feeding two genetically distinct parasites to mosquitoes. Recombinant progeny are cloned from mouse blood after allowing mosquitoes to bite infected mice. This video shows how to produce genetic crosses of Plasmodium yoelii and is applicable to other rodent malaria parasites.
Pattaradilokrat, S., Li, J., Su, X. Protocol for Production of a Genetic Cross of the Rodent Malaria Parasites. J. Vis. Exp. (47), e2365, doi:10.3791/2365 (2011).