Seed vigour traits for the 8 MAGIC parental lines. (a) longevity (percentage of germination after 110d of storage at 35 °C and 75% RH), data are the mean of duplicates (with minimum and maximul values as error bars) of 50 seeds. (b) percentage of germination, (c) percentage of germination capacity, (d) germination speed (t50), (e) germination homogeneity (t80t20). Data are the mean of triplicates (±SD) of 30 seeds. Stars indicate significant difference between control and heat stress using a z-test (p < 0.05) for longevity and a t-test (p < 0.05) for germination, germination capacity, t50 and t80t20.