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Table 1 Mutagenesis efficiency and spectrum of mutants

From: Bistability and hysteresis of the 'Secteur' differentiation are controlled by a two-gene locus in Nectria haematococca

Mutagena Total number of irradiated thalli Total number of fast-growing sectors Types of mutantsb
    nas s* s
UV1 12 15 15 - -
UV2 26 53 53 (13) - -
UV3 21 40 39 (6) 1 (s*11) -
UV4 28 50 49 (16) 1 (s*27) -
UV5 44 75 74 1 (s*4) -
UV6 21 17 17 - -
NG1 28 25 22 2 1(s1)
NG2 22 38 37 1 (s*18) -
NG3 26 42 37 5 -
Total 228 354 343 11 1
   1.5 per dish 97 3  
  1. aUV, 254 nm UV irradiation; NG, N-methyl-N'-nitro-N-nitrosoguanidine. b nas mutants differentiate neither Anneaux nor Secteurs at 26°C but some may do so at other temperatures. Their number are indicated in brackets; s* mutants differentiate Anneaux but not Secteurs, though they have the σ determinant throughout the mycelium; s, cultures differentiate Anneaux but not Secteurs, and never contain the σ determinant.