Location of spring and autumn phenology QTLs on the consensus genetic linkage map from the S
pedigree on LG VIII to XIX. The peak position of the local LOD (P in Table 4) is marked as a squared symbol and a support interval of 1.5-unit drop off on either side of the LOD peak is reported for each QTL. QTLs are named as in Table 4. Candidate genes and their position in the corresponding Populus chromosome are indicated. Grey circle on LG IX: Bud burst QTLs in field (BBF) conditions from  (same mapping pedigree, tentative positions based on common AFLPs). QTLs for phenology traits in Populus (taken from literature) are indicated. Red boxes: Selected QTLs associated with bud set (several stages and sub-processes) in Populus nigra from Table six in . White boxes & Grey boxes: Bud set or bud flush QTLs from  at tentative positions, based on their distance from phenology candidate genes (Chr X) in the original publication (as in ) Green boxes: Bud set robust quantitative trait loci (QTL) regions in .