Figure 6.

Comparative mapping of an Hm1-specific probe in maize, rice, and sorghum. The genetic maps are based on marker orders, recombinational distances, and populations described elsewhere (21, 22). DNA marker loci indicated by (—) were mapped directly in the cited populations, whereas those indicated by ← were mapped in other populations (ref. 23 and unpublished data), and the appropriate locations were inferred based on map positions of flanking markers. For DNA markers that conflict with the most parsimonious interpretation of chromosomal correspondence between taxa, conflicting map positions are indicated in parentheses (M, maize). Comparative markers were mapped in as few as 56 individuals, and thus reversals in order of closely linked loci (<3 cM) are not conclusive evidence of chromosomal rearrangement.