Corrections and additions to the data may change the map relationships of some loci. All locus symbols should be in italics but for readability we have used plain text. The maps are made by omitting all single-locus double recombinants and inferring missing typings from surrounding data where possible. Occasional missing crossover typings have been arbitrarily assigned in order to maintain correct spacing of flanking markers, and these loci are shown in italics. Loci mapped on the BSB cross are given to the left of the map, and loci mapped on the BSS cross are given to the right.
Lines join the maps where the same locus is typed in both crosses.
For cosegregating loci, no order within each group is implied. The number at the bottom of each chromosome indicates the total number of centimorgans for each chromosome map. MIT SSLP loci are red. For further information about a locus on this map use the data listings at BSB Chr 18 Data or BSS Chr 18 Data to link with references and notes.