Fig. 2

Functional allografts of testicular tissue from donor medaka with a different genetic background to the recipients. a An outline of the surgical procedure used here. b An outline of the mating scheme used here. In medaka, females lay eggs after spawning and keep the eggs attached to their belly for awhile. Pigmented eggs are produced following fertilization by spermatozoa of wild-derived strain germ cells. Non-pigmented eggs result from fertilization with d-rR strain sperm. c Representative image of eggs fertilized by a recipient that had been transplanted with testicular tissue from a wild-derived medaka strain; arrowhead, pigmented egg resulting from fertilization with a wild-derived spermatozoon; scale bar, 1 mm. The boxed area is magnified in panel d