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Table 4 Sources of variation of male genitalia interspecific crosses.

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

Sources of variation Crosses
  3512 4855 8832 4853
Size         
  df F df F df F df F
Genotype 2 359.96** 2 204.17** 2 609.06** 2 176.73**
Cactus 1 0.33 1 0.41   -   -
Genotype × Cactus 2 0.14 2 4.49*   -   -
Error 38   69   56   34  
Shape         
  df λ df λ df λ df λ
Genotype 20 0.015** 20 0.095** 20 0.015** 20 0.014**
Cactus 10 0.865 10 0.914   -   -
Genotype × Cactus 20 0.635 20 0.672   -   -
  1. F values of the ANOVAs and Wilk's lambda of MANOVAs for aedeagus size and shape respectively. *p < 0.05; ** p < 0.01