Table 2.
A. niger, spontaneous mutation frequencies in nine different strains
| Slope and strain | Conidial color mutants, % | Morphological mutants, % | Total mutants,% | Total colonies |
|---|---|---|---|---|
| ES/NFS | ||||
| 22 | 0.82 | 0.68 | 1.50 | 9,106 |
| 23 | 0.36 | 0.92 | 1.28 | 8,148 |
| 24 | 0.33 | 0.08 | 0.42 | 14,467 |
| AS/SFS | ||||
| 25 | 0.78 | 1.74 | 2.52 | 13,585 |
| 26 | 1.45 | 2.51 | 3.97 | 11,801 |
| 28 | 0.63 | 4.12 | 4.75 | 3,349 |
| 29 | 0.24 | 2.06 | 2.30 | 5,966 |
| 30 | 2.08 | 2.81 | 4.89 | 10,568 |
| 31 | 1.13 | 3.31 | 4.44 | 5,862 |
Homogeneity 2 × n χ2tests, within slopes in all cases. Conidial color mutants, ES/NFS, χ2 = 31.84; df, 2; P < 0.001; AS/SFS, χ2 = 156.60; df, 5; P < 0.001. Morphological mutants, ES/NFS, χ2 = 90.39; df, 2; P < 0.001; AS/SFS, χ2 = 92.59; df, 5; P < 0.001. Total mutants, ES/NFS, χ2 = 83.12; df, 2; P < 0.001; AS/SFS, χ2 = 150.73; df, 5; P < 0.001.