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Analysis of variance of the number of chiasmata per meiocyte among maize inbreds shown in Fig. 1
| Source of variation | Sum of squares | df | Mean sum of squares | F value |
| Between inbreds | 2,633 | 13 | 202.5 | 139.9* (P = 0.0001) |
| Error | 832.5 | 575 | 1.448 | |
| Total | 3,465 |
