Figure 2.—

Relative mean fitness of mutation accumulation lines grown under four different conditions, shown on the x-axis from left to right: (i) 25° on SD medium; (ii) 25° on YEPD medium; (iii) 37° on SD medium; (iv) 37° on YEPD medium. Only clones from G₆₀₀ are shown here. (A) MA lines maintained at 25° on YEPD medium. (B) MA lines maintained at 37° on YEPD medium. All MA lines correspond to those in Table 1.