Transcriptomic analysis of photoperiod regulated dormancy induction in grapevine.

Transcriptomics study of F2 siblings with different dormancy responsiveness due to photoperiod subjected to long day and short day. F2 040 and F2 110 genotypes were previously described as part of a larger F2 population (Fennell et al., 2005, Acta Hort 689:533-539). The F2 040 and 110 genotypes exhibit photoperiod responsive characteristics similar to the Seyval and V. riparia grandparent, respectively (Fennell et al., 2015, doi: 10.3389/fpls.2015.00834) Spur-pruned grapevines were grown under long days until shoots reached 12-15 nodes and then randomized into a continued long (LD, 15 h) or short photoperiod (13 h) for 28 or 42 days (George et al. 2018, J.Prot:187:13-24). Buds were harvested from nodes 3 to 12 on the shoot at 28 or 42 days of LD or SD. Three replications (10 vines per replicate) were harvested for each photoperiod treatment.