Deletion of a genetic element between pseudogene 7838* and the right border of Sk-2INS1 eliminates spore killing. (A–I) The images depict asci from crosses between an SkS strain and an Sk-2 mating partner. Each Sk-2 mating partner has been deleted of a different subinterval of v5. Crosses are as follows: (A) F2-26 × ISU-3311, (B) F2-26 × ISU-3313, (C) F2-23 × ISU-3315, (D) F2-26 × ISU-3318, (E) F2-23 × ISU-3321, (F) F2-26 × ISU-3478, (G) F2-26 × ISU-3482, (H) F2-26 × ISU-3483, and (I) F2-26 × ISU-3485. B, black; W, white.