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Fig. 4. Standard, accelerated aging, and cold test germination for seed lots of hybrid A harvested at different developmental stages in 1998 (solid line), 1999 (dashed line), and 2000 (dotted line). Solid symbols represent the germination from one replication of unfrozen seed while the open symbols represent the germination from seed that was frozen at –6°C for 6 (1998) or 7 (1999, 2000) hours. Symbols with the dot were used in the linear model. The 95% confidence interval around regression lines can be used to compare differences among years. Seed moisture content at physiological maturity in 1998, 1999, and 2000 was 342, 344, and 374 g kg–1, respectively.
