(a, b) Line plots of the six RI populations showing the distribution of fatty acids, expressed as the percentage of total seed fatty acid content. DS, CL and fatty acid ratios are also shown. Seed oil content is expressed as percentage of dry weight. The trait values are grouped in bins along the X axis, and the number of plants per bin are given on the Y axis. The line colours are used to denote the populations as follows: CA, Dark blue; KB, Red; NG, Green; SG, Purple; TJ, Light blue; WC, Orange. CA and WC are the normalised means of the CER and the GH experiments.

The physical positions of QTLs identified for fatty acid contents, ratios and oil contents across the six Arabidopsis RI populations. CA and WC are described under both CER and GH environments. The positions were determined using the marker with the most significant LOD value for each QTL. The map was constructed using the physical positions of the markers used to generate the genetic maps. The populations and environments are colour coded. Coincident QTLs share the same line and where there are many a vertical line is used to indicate the grouping with the midpoint of the line at the marker position. QTLs were considered to be coincident if the marker positions were 0.5 Mb or less apart. The chemical symbols used represent the following: 16:0, palmitic acid; 18:0, oleic acid; 18:1, stearic acid; 18:2, linoleic acid; 18:3, linolenic acid; 20:0, arachidic acid; 20:1, eicosenoic acid; 20:2, eicosadienoic acid; 22:1, erucic acid; oil, % of total dry seed weight; 18:0/16:0, the ratio of oleic acid and palmitic acid; 18:1/18:0, the ratio of stearic acid and oleic acid; 18:2/18:1, the ratio of linoleic acid and stearic acid; 18:3/18:2, the ratio of linolenic acid and linoleic acid; CL (calculated as described in Material and methods) and DS (calculated as described in Material and methods).