In 20 °C, fog-mutated lines had higher reproductive success than wild type (p = 0.005) and xol-mutated (p = 0.002) lines, whereas in 25 °C the situation was reversed (both p < 0.001) (Fig. 2), which was largely due to the high levels of infertility in fog-mutated lines (see above). The gene discussed is ZFPM1; the disease is Infertility.