Fig. 1.

Phenotypes of Tibetan turnip in response to vernalization. A. Representative turnip plants cultivated without vernalization (NV) or with vernalization treatment (V20-60 d). Scale bar is 10 cm. B. Average flowering time (d, days to flower) after different vernalizaton treatments. C. Duration of the flowering phase after different times of vernalizaton. D. Diameter of tuber in response to cold exposure. Data are means ± SD of three biological replicates. ANOVA was performed for statistical analysis. Bars with different letters are significantly different from each other (P < 0.05).