Table 2.

ANOVA results for probability of producing selectable seed, mass of selectable seed produced, and adjusted fitness.

	Overall			Lowland populations			Midland populations			Highland populations
Effect	DF†	F	Signif.	DF	F	Signif.	DF	F	Signif.	DF	F	Signif.
A. Probability of producing selectable seed
Common garden	1, 80	97.16	****	1, 24	0.01	ns	1, 24	9.47	**	1, 24	131.67	****
Replication	4, 80	1.32	ns	4, 24	0.47	ns	4, 24	0.9	ns	4, 24	0.72	ns
Altitudinal grouping	2, 80	73.73	****	–	–	–	–	–	–	–	–	–
CG*Alt	2, 80	57.47	****	–	–	–	–	–	–	–	–	–
CG*Population (Alt)	36, 80	8.65	****	12, 24	0.46	ns	12, 24	28.7	****	12, 24	2.88	**
B. Weight of selectable seed (g)
Common garden	1, 71	339.02	****	1, 24	226.5	****	1, 19	91.8	****	1, 20	76.7	****
Replication	4, 71	3.84	**	4, 24	5.33	**	4, 19	1.61	ns	4, 20	0.38	ns
Altitudinal grouping	2, 71	11.35	****	–	–	–	–	–	–	–	–	–
CG*Alt	2, 71	11.26	****	–	–	–	–	–	–	–	–	–
CG*Population (Alt)	32, 71	2.44	***	12, 24	4.19	***	10, 19	0.94	ns	10, 20	2.85	*
C. Adjusted fitness (g)
Common garden	1, 80	706.99	****	1, 24	95.39	****	1, 24	110	****	1, 24	1188.8	****
Replication	4, 80	0.67	ns	4, 24	1.59	ns	4, 24	0.22	ns	4, 24	0.38	ns
Altitudinal grouping	2, 80	1.15	ns	–	–	–	–	–	–	–	–	–
CG*Alt	2, 80	45.02	****	–	–	–	–	–	–	–	–	–
CG*Population (Alt)	36, 80	10.9	****	12, 24	1.76	ns	12, 24	14.33	****	12, 24	16.56	****

Separate analyses were run with PROC MIXED: overall and by altitudinal grouping of maize populations. Data were collected in 2004 from maize plants grown in a highland garden in San Cristobal de Las Casas and a midland garden in Comitan, Chiapas, Mexico.

^*<0.05,

^**<0.01,

^***<0.001,

^****<0.0001; †numerator df, denominator df.