TABLE 4

Comparison of the mean number of chiasmata for four different inbred lines and a hybrid between two inbred lines (B73/Mo17)

Inbred lineNo. of cells (bivalents)Mean no. of chiasmata (SD)No. of bivalents witha
0 chiasmata1 chiasmata2 chiasmata≥3 chiasmata
W22267 (2670)21.2 (1.9)2 (0.1)303 (11.3)1758 (65.8)607 (22.7)
B73/Mo17267 (2670)21.0 (1.8)1 (0.0)267 (10.0)1892 (70.9)510 (19.1)
B73270 (2700)20.9 (2.2)10 (0.4)355 (13.1)1753 (64.9)582 (21.6)
KYS278 (2780)18.9 (2.5)31 (1.1)667 (24.0)1673 (60.2)409 (14.7)
Mo17283 (2830)18.5 (1.8)15 (0.5)607 (21.4)1983 (70.1)225 (8.0)

Five plants from each line were sampled. The mean number of chiasmata varies significantly between lines (ANOVA, P < 0.001) as do the variances (Levene's P < 0.001).

  • a Numbers in parentheses represent percentages.