Figure Legends
Figure 1. The differences in the average air-temperature and daylength between the EARLY and LATE rice-cultivation season. (a ) Patterns of 10-year average daily air-temperature and daylength variation in the EARLY (ES) and LATE (LS) rice-cultivation seasons, respectively. Grey lines represent the air-temperature, and black lines for daylength. (b ) Air-temperature differences between the two rice-cultivation seasons at different rice growth stages. White bars represent the early rice-cultivation season, and grey bars for the late season. (c ) Daylength differences between the two rice-cultivation seasons at different rice growth stages. White bars represent the early rice-cultivation season, and black bars for the late season. S, seedling; T, tillering; F, flowering; R, ripening. ***,p <0.001. Error bar, standard deviation.
Figure 2. Plant height of weedy rice populations at different stages in the EARLY (-E) and LATE (-L) rice-cultivation seasons. Bar plots show the plant height in CDE/L (a ), HJE/L (b ) and DCE/L (c ) population pairs at different stages, respectively. *, p <0.05, ***, p <0.001.
Figure 3. Number of tillers per plant of weedy rice populations at different stages in the EARLY (-E) and LATE (-L) rice-cultivation seasons. Bar plots show the number of tillers per plant in CDE/L (a ), HJE/L (b ) and DCE/L (c ) population pairs at different stages, respectively. *, p <0.05, **,p <0.01, ***, p <0.001.
Figure 4. The flowering time patterns of weedy rice populations in the EARLY rice-cultivation season. Flowering time patterns within population pair are showed in (a) CDE/L, (b) HJE/L and (c) DCE/L, respectively. Horizontal axes represent the date of flowering, indicated by days after germination (DAG), and vertical axes represent the proportion of flowering plants. Curves of weedy rice populations belong to the same pair are plotted together to show the disjunction in flowering time between the early- and late-season weedy rice populations. Grey curves indicate the early-season weedy rice populations, and black curves indicate the late-season weedy rice populations.
Figure 5. Flowering time of weedy rice populations in the EARLY (-E) and LATE (-L) rice-cultivation at different stages. Bar plots show the flowering time when the proportion of flowering plants is determined as 1%, 30%, 50% and 80% in (a) CDE/L, (b) HJE/L and (c) DCE/L population pairs, respectively. *, p <0.05, **,p <0.01, ***, p <0.001.
Figure 6. Reproductive traits of the early- and late-season weedy rice populations planting in the EARLY (-E) and LATE (-L) rice-cultivation seasons. (a ) Grain per plant; (b ) Seed setting ratio; (c ) 100-seeds weight. *,p <0.05, **, p <0.01, ***,p <0.001. CD, Chi Dou; HJ, He Jia; DC, Dong Cun. E/L-E, the early-/late-season populations planting in the EARLY rice-cultivation season; E/L-L, the early-/late-season populations planting in the LATE rice-cultivation season.
Figure 7. The model of local adaptation in weedy rice associated with ambient temperature and daylength. WRE, the weedy rice collected from the EARLY rice-cultivation seasons. WRL, the weedy rice collected from the LATE rice-cultivation seasons.