Fig. 6.
Effect of a 4D chromosomal fragment on plant height, spike number and grain weight in durum grown in the absence of Al3+ toxicity. Three pairs of T and S sibling lines were planted into soil (pH 6·2) and assessed for (A) plant height, (B) spike number, (C) grain yield at maturity and (D) the weight of 100 grains. Since the pairs of lines were sown at different times, comparisons could only be made between individual lines of each pair. For (D), data were only collected from two pairs of lines. Differences between T and S lines as identified using a two-tailed Student's t-test are denoted by * (P < 0·05) and ** (P < 0·001). Error bars denote the s.e.m. (n = 20 for A, B and C; n = 5–7 for D).