Fig. 3

Physical maps and structural comparison of the spr9 gene. a: Primary mapping of the spr9 gene. The gene was mapped to the region between the markers RM8211 and RM5970. b: Further mapping of the spr9 gene. The gene was mapped to the region between commonmarkers RM1090 and RM1187. c: Accurate mapping of the spr9 gene. The spr9 was mapped to the region between markers Indel15-5 and Indel15-6 selected from 10 newly developed InDel markers. d: Fine mapping of the spr9 gene. The spr9 was localized to a 43-kb region between the markers Indel15-18 and Indel15-22 selected from 21 newly developed InDel markers, and the recombinant number between the markers and target genes is indicated under the linkage map. e: Candidate genes in the 43-kb target region. f: SPR9 has three exons, and spr9 exhibits a 1 bp deletion in the first exon