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

Soto et al. BMC Evolutionary Biology 2007 7:77   doi:10.1186/1471-2148-7-77