A fourth subgenome of the Camelina genus reveals gene dominance is influenced by chromosomal proximity (opens in new tab)

Camelina sativa, an oilseed crop of the Brassicaceae family, has close relatives that vary in ploidy levels, providing a unique platform for studying plant genome evolution. Here, we report an improved assembly of the widely used C. sativa reference DH55 and three additional genome assemblies of Camelina microcarpa: one tetraploid, and two hexaploids with divergent chromosome numbers, Type 1 (2n = 40) and Type 2 (2n = 38). We uncover the fourth subgenome of the Camelina genus that of C. micro...