Figure 2

Colorado potato beetle performance on S. pennellii introgression lines. (a) CPB larval mass and (b) survivorship were recorded 10 days after infestation. Black bars show performance and survival on parental lines. Green bars represent introgression lines where CPB has either significantly better performance than on M82 or greater survival than on S. pennellii (P < 0.05, Dunnett’s test). Red bars represent introgression lines where CPB has the same performance or survivorship as on S. pennellii plants and lower than on M82 (P < 0.05, Dunnett’s test). All bars represent the mean of 2 or 3 plants. (c) Representation of the chromosomes with introgression lines that affect CPB resistance. Each chromosome is divided into bins based on the classic tomato genetic map (marked with italics, 6 A, 6B, etc.) Horizontal bars are marked with the name of the respective introgression lines carrying segments of S. pennellii introgressed into S. lycopersicum. The approximate position of the flanking markers is shown in centimorgans (Tomato Expen 2000 map, www.solgenomics.net). The most susceptible (IL 6-2, IL 6-2-2, green) and the most resistant (IL 8-1-3, IL 10-2; red) lines are indicated by colored bars.