Maps of <i>Sclerotinia sclerotiorum</i> mating type alleles that differ by a 3.6-kb inversion.

<p>Inv- (top) and Inv+ (bottom) <i>MAT</i> alleles are shown, the 3.6-kb <i>MAT</i> inversion region is indicated by a gray horizontal line. Genes are colored boxes, white and dotted boxes within genes correspond to alpha1 and HMG domains, respectively, flanking genes are white boxes, directions of transcription are indicated by arrows, gene names are inside or by the boxes. Dashed box and arrow represent <i>MAT1-1-1</i> 3’-fragment lacking an in frame start codon. Diagrams are to scale. The Inv+ alpha1 box is truncated after 45 bp and is not illustrated, for details see text.