Fig. 4

Duplication events of NLR Genes in S. bicolor. a Collinearity analyses of NLR genes between BTx623 and GJH1. Red and blue represent BTx623 and GJH1 chromosomes, respectively. Gray lines in the background show the collinear relationship of the whole gene pairs, while the purple line highlights the collinear NLR gene pairs between BTx623 and GJH1. b Collinearity blocks containing whole genome duplication gene pairs, with red lines indicating NLR gene pairs. c Ks values of different types of duplicated NLR gene pairs. d Ka/Ks values of different types of duplicated NLR gene pairs