Days to flowering in the field. Detailed legend: Days to flowering of 70 winter cultivars planted on March 25th, 2010, after 0, 15, 30, 45 or 60 d of vernalization at 3°C under a 9-h light/15-h dark photoperiod with low light intensity. Orange - dominant allele (PPDH2); blue - recessive allele (ppdH2). Error bars represent the LSD (P < 0.05).
Casao et al. BMC Plant Biology 2011 11:164 doi:10.1186/1471-2229-11-164