Reproductive success of 239 crosses (478 matings). Columns represent the 16 mat A strains, and rows represent the 15 mat a strains, with isolates numbers along the row and column headings of the matrix. Numbers within matrix cells indicate the reproductive success ratings (see below) of the two reciprocal matings of the cross between the corresponding isolates (mat a isolate as the perithecial parent/mat A isolate as the perithecial parent). The matrix cells have been shaded in proportion to the reproductive success of the best mating (see Figure 5B in the corresponding publication). Additional row and column headings indicate the lineage designation (see Figure 1). Isolates P581 and TX8127 are tester strains of N. discreta sensu stricto. Categories of reproductive success, corresponding to different stages in reproductive development, from the development of perithecia, to the formation of black ascospores were scored as follows: 0 & 1 if sterile, no perithecia produced; & barren perithecia, no ostiole developed; 2 if perithecia developed ostioles, but no spores; 3 & 4 if 50% black ascospores
