Figure 2. A major QTL conferring resistance to Verticillium wilt detected on chromosome 6.

Linkage group c6 (a) was constructed from LHB22×JM11 F_2:3 population and linkage group c6 (b) was constructed from LHB22×NNG F_2:3 population. The c6 (c) map was drawn according to a consensus map of cotton [31] and only the related markers were selected. The QTL qVW-c6-1 was detected in LHB22×JM11 population in 2010 at seedling stage in greenhouse (E1), and was further detected at flowering stage in 2011 (E2) and mature stage in 2011 (E3) and 2012 (E4) in LHB2×NNG F_2:3 population.