Table 1.

Analyses of variance and covariance for five traits of commercial soya bean (G. max) in response to intra-specific neighbour relatedness and cultivar identity across relatedness treatments. Stem biomass was used as covariate for elongation, root/stem and leaf/stem allocation. Leaf biomass was used as covariate for root/leaf allocation. Italics indicate significant values.

		total biomass		elongation		root/stem allocation		root/leaf allocation		leaf/stem allocation
covariance parameters		Z	PrZ	Z	PrZ	Z	PrZ	Z	PrZ	Z	PrZ
replicate		1.2	0.1124	1.1	0.1270	1.2	0.1129	1.2	0.1120	1.2	0.1221
Rep × Rel		0.4	0.3341	—	—	0.2	0.4093	0.3	0.3653	0.8	0.2121
Rep × Cul		—	—	0.6	0.2763	1.1	0.1362	1.1	0.1330	0.2	0.4094
residual		15.8	<0.0001	15.7	<0.0001	15.7	<0.0001	15.7	<0.0001	15.7	<0.0001

fixed effects	ndf/ddf	F	p	F	p	F	p	F	p	F	p
relatedness	1/3	0.02	0.8996	0.7	0.4580	0.2	0.6616	0.2	0.6858	0.9	0.4125
cultivar	2/6	5.08	0.0513	20.4	0.0021	3.6	0.0930	2.6	0.1545	2.0	0.2228
Rel × Cul	2/491	1.18	0.3077	0.1	0.9519	0.5	0.6132	0.01	0.9856	1.6	0.1982
covariate	1/491	—	—	301.4	<0.0001	765.8	<0.0001	1093.8	<0.0001	1765.2	<0.0001