Fig. 4.

Days to ear emergence measured at growth stage 55 (Zadoks et al., 1974) of four independent Spark X Rialto Backcross 2 (BC2) SSD populations (POP1–POP4) scored at F5 (BC2F5). The two NILs, NIL10 and NIL12, carrying the Spark and Rialto 1DL alleles, respectively, were used as controls and grown together with SSD populations. Key: DTH was measured at growth stage 55 (Zadoks et al., 1974) shown by the arrows pointing at the uncoloured numbers. The coloured numbers are the individual SSD lines. POP1, POP2, POP3, and POP4 are the four Spark X rialto 1DL SSD populations at BC₂F₅. Spark and Rialto alleles are the 1DL deletion and intact chromosomes, respectively.