Figure 1

An overview of distribution of 91 COs and 21 GCs on 16 yeast chromosomes. (A) Sequences identical to S288C are shown as blue bars, those identical to RM11 as red bars. Empty areas near chromosome ends (repetitive telomere regions) do not have reads coverage or SNPs. There is a deduced CO event if the color changes from blue to red in one meiotic product and from red to blue in another at closely spaced positions. The number of COs on each chromosome is shown below the chromosome name. The GC positions on each chromosome are indicated by vertical lines with a number from 1 to 4 indicating the corresponding converted meiotic product. GC was not detected on chromosomes 1, 9 and 14. (B) An example of a CO from chromosome 15 shows the mapping of reads for the four meiotic products. Blue bars represent mapped reads matching the S288C sequences, red bars represent reads matching RM11. The meiotic product #1 is identical to S288C and #3 is to RM11 in this region; they were not involved in the CO event. Product #2 and #4 exchanged sequences, indicating a CO event whose minimum and maximum sizes (visible) are defined by the two horizontal range arrows at the top. Vertical gray lines show the positions of SNPs between S288C and RM11.