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Table 4 Expression variation in sex-biased genes

From: Gene expression variation in African and European populations of Drosophila melanogaster

 

Two-fold

FDR10%

Sex-bias classification*

Male

Female

Unbiased

Male

Female

Unbiased

Number of genes on array

669

768

3,891

1,228

857

1,534

Percentage of genes detected as expressed

61†

22

41

67†

33

41

Percentage of expressed genes

   Variable in Europe

20‡

12

16

22†

13

15

   Variable in Africa

28†

15

16

27†

16

17

   Variable overall

42†

32

31

45†

31

32

   Differentially expressed between populations

1.21§

2.86

3.54

2.46

1.75

3.10

Average percentage of pairwise differences

   Within Europe

2.50†

1.14

2.07

2.93†

1.50

1.82

   Within Africa

3.96†

1.08

1.75

3.57†

1.32

1.75

   Overall

3.16†

1.09

2.21

3.35†

1.50

2.00

  1. *Sex-biased gene sets are defined by Gnad and Parsch [36]. †Significantly different from both female and unbiased (P < 0.05) by Fisher's exact test (percentages) or Mann-Whitney U test (pairwise differences). ‡Significantly different from female (P < 0.05) by Fisher's exact test. §Significantly different from unbiased (P < 0.05) by Fisher's exact test.