Table 2.

Siring success in conspecific (Con), heterospecific (Het), and mixed-species (Mix) treatments (backtransformed mean/tree; n = # of progeny scored)

Maternal species				RCS		G	P
	Proportion of seeds germinated
	Con	Het	Mix	Single species	Mixed species
Water birch	0.180	0.015	0.134	0.923	0.982	8.95	0.005
	n = 1,693	n = 1,650	n = 1,673		n = 128
HC paper	0.470	0.292	0.436	0.617	0.992	28.22	<0.0001
birch	n = 378	n = 211	n = 457		n = 32
HI paper	0.172	0.006	0.197	0.966	0.982	1.07	0.300
birch	n = 1,317	n = 1,299	n = 1,442		n = 112

G tests compare RCS in single-species versus mixed-species crosses. In the single-species crosses, RCS was calculated as % conspecific germination/(% conspecific germination + % heterospecific germination). In the mixed-species crosses RCS was calculated as the proportion of seedlings sired by conspecific fathers, as determined by paternity analysis. A value of 0.5 would indicate equivalent success.