Bins are segments of approximately 20 cM delimited by two fixed Core Markers (Gardiner et al., 1993). These bins are designated by a chromosome number followed by a two-digit decimal (e.g., 1.00, 1.01, 1.02, etc). The bin is an interval that includes all loci from the leftmost or top Core Marker to the next Core Marker. Placement of a locus to a bin is dependent on the precision of mapping data, and increases in certainty as markers increase in number or populations increase in size. On the Gramene version of this map, the position of each core marker is based on the Maize UMC 1998 map.

The Maize Bins QTL map displays all maize QTLs imported from Maize GDB. Those QTLs were originally curated in Maize GDB with minor modifications according Gramene SOPs. We acknowledge Carolyn Lawrence, Mary Polacco, Trent Seigfried, and Darwin Campbell in MaizeGDB for their collaboration and sharing of data.