Design of cross-mating experiments to obtain F1 and BC generations, performed with four B. plicatilis populations. TOS population was regarded as a resident population and the other three (HOS, TUR and CHI) as alternative immigrant source populations. N is the number of eggs tested for hatching.
Tortajada et al. BMC Evolutionary Biology 2010 10:312 doi:10.1186/1471-2148-10-312