Fig. 2

Distinct [AT]-increase among subgenomes from wild progenitors to bread wheat at chromosome and chromosomal window levels. a Chromosomal [AT] values of bread wheat and its wild progenitors. Three groups of bread wheat including variety, landrace-west, and landrace-east are colored dark green, green, and light green, respectively. Wild emmer and Ae. tauschii are colored yellow, while durum is colored red. b [AT]-differences across 2-Mb windows between bread wheat and wild emmer on A and B subgenomes (gray), and between bread wheat and Ae. tauschii on D subgenome (green). Gray horizontal line at [AT]-difference = 0 indicates the separation of chromosomal windows following [AT]-increase pattern (98.6%, 13,693/13,879) and others. Red horizontal line is another important boundary at [AT]-difference = 0.1, due to that there are less chromosomal windows above the line in A and B subgenomes (26.1%, 2599/9962), but more in D subgenome (58.1%, 2277/3917). Numbers above violins are the proportions of chromosomal window above the red horizontal line. c [AT]-difference between bread wheat and its wild progenitors on 21 chromosomes and 105 differential-recombination regions. X-axis indicates [AT]-difference, and the Y-axis indicates chromosome and differential-recombination regions within. For chromosomal violins, the adjacent numbers are the proportion of chromosomal window above the red horizontal line. For differential-recombination zones, the adjacent letters indicate significant differences (p < 0.05) when analyzed by Duncan’s test