No Gene Gene ID Chromosome location Start positionin scaffold Genomic sequence length (bp) CDS sequence length (bp) Amino acid  sequence length (aa) No of exons CDS identity(%) Amino acid identity (%) Duplication time (MYA) Ks Catalytic site C220 H360 H396 N413 R399 1 KAS Ia-1 Lus10025390 scaffold46 (LG12) 408940 2,695 1,410 469 7 91.7 94.9 9.5 0.123 + + + G K 2 KAS Ia-2 Lus10015267 scaffold924 (LG12) 234076 2,638† 1,425 470 6         + + + G K 3 KAS Ib-1 Lus10040883 scaffold156 (LG3) 2043083 3,012 1,425 474 7 68.4 67.3 16.8 0.219 + + + G K 4 KAS Ib-2 Lus10004935 scaffold858 (LG8) 182334 1,923 1,092 363 7         + + + G K 5 KAS Ic-1 Lus10001814 scaffold3494 (LG7) 17887 2,893 1,719 582 8 75.7 77.7 15.0 0.195 + + + G K 6 KAS Ic-2 Lus10003195 scaffold1056 (LG9) 24875 2,847 1,455 484 6         + + + G K 7 KAS II-1 Lus10034886 scaffold66 (LG5) 1423486 4,672 1,692 563 13 77.5 76.6 4.4 0.057 + + + G H 8 KAS II-2 Lus10033422 scaffold488 (LG3) 1269585 4,837 1,401 466 12         + + + G H 9 KAS IIIa-1 Lus10024608 scaffold349 (LG8) 281086 2,572 1,227 408 8 96.6 97.1 6.2 0.081 + + N + + 10 KAS IIIa-2 Lus10032246 scaffold291 (LG5) 266433 2,572 1,227 408 8         + + N + + 11 KAS IIIb-1 Lus10004342 scaffold1134 (LG9) 133755 2,362 1,212 403 8 94.7 93.1 7.5 0.098 + + N + + 12 KAS IIIb-2 Lus10028925 scaffold540 (LG7) 890572 2,453 1,209 402 8         + + N + + 13 mtKAS-1 Lus10014622 scaffold398 (LG3) 39249 2,888 1,428 475 13 86.8 86.4 5.5 0.071 + + + G T 14 mtKAS-2 Lus10033810 scaffold222 (LG15) 385235 3,987 1,584 527 14         + + + G T †Corrected length. Catalytic site: +indicates the presence of the residues of the putative catalytic sites. The residue position is based on the sequence of KAS Ia-1.

Table 1: KAS gene family involved in fatty acid elongation and condensation identified in flax cv. CDC Bethune.