TABLE 2.

The chi-square values and test results from the combined population analyses (see text for details)

	Null hypothesis
	No maternal effect:	No epistasis:
Untransformed trait values
Corolla width	1.39	4.06
Days to flower	3.96*	2.25
Corolla length	0.00	1.79
Pistil length	0.76	0.82
Anther length	0.73	0.07
Stigma-anther separation	0.15	0.32
Pollen no.	0.16	4.49
PSI	1.86	45.19***
Viable pollen	0.34	8.03*
Log-transformed pollen values
Ln(pollen no.)	2.03	3.78
Ln(PSI)	2.33	42.53***
Ln(viable pollen)	3.85	16.51***

The test for the maternal effect has 1 d.f. while the test for epistasis has 2 d.f. Significance levels: *0.01 < P < 0.05, ***P < 0.001.