A comparative study of ripening among berries of the grape cluster reveals altered transcriptional program and enhanced ripening rate in delayed berries !

Ripening progress in each class in relation to RS berries during the first 3-week period To assess the progress of ripening during early-véraison in GH, GS, and PS berries relative to that of RS berries, principle component analyses were performed using TSS, color index, and elasticity data of individual berries from each under-ripe berry class along with those of RS berry class during the first 3-week period following mid-véraison (Supplementary Fig. S3A-C). No ripening progress was observed in GH berries between V and Week 1 (Supplementary Fig. S3A). In contrast, the ripening progress of GS berries was apparent at V but still lagged behind RS berries at Week 3 (Supplementary Fig. S3B). PS berries matched the RS berry ripening state by Week 1 and further progress was concomitant in both classes (Supplementary Fig. S3C). Discriminant analyses to examine the advancement of individual berries of a class (Supplementary Fig. S3D-G) showed that the majority of berries in a class advanced together during the first 3-week period, after which each berry class ceases to maintain its unique identity.