Fig. 3.   Transformation of the ixr1-2 mutant with a wild-type IXR1 gene results in isoxaben sensitive progeny. (A) Segregating T2 progeny of an ixr1-2 mutant transformed with cosmid I (Fig. 2). Approximately 75% of the progeny, representing heterozygous and homozygous ixr1-2 transformants, are herbicide-sensitive when grown on vertical MS plates containing 600 nM isoxaben. (B) Progeny of an ixr1-2 mutant transformed with cosmid F were 100% isoxaben-resistant. [from Scheible et al. 2001]