Reinforcement of Gametic Isolation in Drosophila
Figure 2
Noncompetitive gametic isolation between D. yakuba and D. santomea.
(A) D. santomea sympatric females produced the same amount of progeny as allopatric lines after being mated to D. yakuba males. Bars A–F (dark grey): allopatric lines; bars G–O (white bars): sympatric lines. (B) Reproductive character displacement in D. yakuba. Females derived from flies sympatric to D. santomea yield fewer progeny than do allopatric females after being mated with D. santomea, suggesting a higher level of gametic isolation in sympatric females. Bars A–M (dark grey): allopatric lines; bars N–V (white): sympatric lines. Each bar represents the mean (SE) number of eggs from independent heterospecific single matings of D. yakuba and D. santomea females. The list of crosses can be found in Tables S2 and S3.
