Fig 4. SPO11 deletion mutant.

A. Number of basidia observed per plate in sporulation proficient mutants after 10 days of incubation in sporulation medium at 18°C. Error bars represent standard deviations from the mean for the three biological replicates. No significant differences were observed between the sporulation ability of the wt and spo11Δ mutant. B. Total number of basidiospores recovered from wt and spo11Δ mutant and fraction of viable spores (asterisks denote significant difference, P value = 0.000302, Chi-square statistic).