Figure 1

Schematic diagram showing the development process of clubroot resistant (CR) resynthesized (RS) and semi-resynthesized (SRS) B. napus (AACC). Reciprocal crosses were initiated between B. rapa (AA) line T19 and B. oleracea (CC) lines ECD11, and non-reciprocal crosses were made between B. rapa (AA) line T19 and B. oleracea (CC) lines JL04. Semi-resynthesized (SRS) B. napus (AACC) lines were created by crossing resynthesized (RS) F2 plants with doubled haploid (DH) B. napus canola line DH16516 (DHT).