Colocalizations considered between 59 cell wall digestibility QTLs and 442 cell wall related genes.
176 candidate genes colocalized with 38 non-overlapping QTL positions.
Most frequent QTL colocalizations with genes encoding transcription factors.
Close colocalizations somewhat infrequent with genes involved in monolignol biosynthesis.
Probable prevalent role of regulation factors over constitutive wall genes on digestibility variation.