Table 2.

Sources of variation of male genitalia in Drosophila buzzatii and D. koepferae.

Sources of variation	df	Size	Shape
			PC1	PC2	PC3	PC4	PC5
a)
Species (Sp)	1	1812.95*	3519.85*	3.39	0.15	0.11	5.07*
Cactus	1	6.56*	0.04	0.95	1.47	0.39	2.62
Species × Cactus	1	0.77	0.53	0.02	0.99	1.42	1.18
Line(Sp)	28	2.05*	5.91*	2.36*	3.66*	3.08*	1.75
Line(Sp)*Cactus	28	1.99*	1.33	1.72*	0.99	1.88*	1.74*
Error	487
b)
Drosophila koepferae
Line	14	4.71*	6.99*	4.35*	3.97*	3.29*	2.63*
Cactus	1	4.02	0.62	0.24	0.5	0.49	0.23
Line × Cactus	14	1.12	0.89	1.1	2.00*	1.41	1.35
Error	264
Drosophila buzzatii
Line	14	1.39	3.25*	3.71*	4.08*	6.87*	3.65*
Cactus	1	3.31	0.07	1.67	2.71	1.88	0.04
Line × Cactus	14	2.47*	2.18*	1.1	1.06	1.25	1.33
Error	224

F values of the ANOVAs and MANOVAs for aedeagus size and shape respectively in interspecific (a) and intraspecific (b) analyses. * p < 0.01