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Table 1 Ratio of expression between X chromosome(s) and autosomes for males and females using minimum RPKM threshold

From: Dosage compensation and sex-specific epigenetic landscape of the X chromosome in the pea aphid

Genes taken into account

Number of genes retained

Female

Male

X

A

XX/AA ratio

p value*

X/AA ratio

p value*

All genes

13,708

19,230

0.00

<2.20E−16

0.00

<2.20E−16

Genes with RPKM >1

1886

9087

0.45

<2.20E−16

0.83

1.16E−04

Genes with RPKM >2

1484

7871

0.58

<2.20E−16

0.94

0.372

Genes with RPKM >3

1260

7010

0.62

<2.20E−16

0.99

0.891

Genes with RPKM >4

1069

6275

0.69

<2.20E−16

0.91

0.119

  1. All genes or different mean RPKM cutoffs have been considered to filter expressed genes
  2. * p values were calculated using Wilcoxon rank sum tests to compare X-linked and autosomal genes expression for a given morph