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Table 2 Sources of variation of male genitalia in Drosophila buzzatii and D. koepferae.

From: Evolution of male genitalia: environmental and genetic factors affect genital morphology in two Drosophila sibling species and their hybrids

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