Fig. 1
Herbicide screening of the Lu37-1 cotton mutant with imazapic. a Field screening of the cotton M2 generation by pre-emergent application of the 6 × the recommended rate. b At 44 DAT, susceptible M3 plantlets under imazapic treatment in the growth chamber. c At 70 DAT, two imazapic-tolerant M3 plantlets (i.e., Lu37-1-1 and Lu37-1-2) grown normally under treatment of imazapic in the growth chamber. d At 45 DAT, herbicide response of the wild-type Lu37 seedlings under treatment with 3 × the recommended rate of imazapic in the field. e At 45 DAT, herbicide response of the mutant Lu37-1 seedlings (M4 generation) under treatment with 3 × the recommended rate of imazapic in the field. f At 45 DAT, herbicide response of the mutant Lu37-1 seedlings (M4 generation) under treatment with 6 × the recommended rate of imazapic in the field