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Table 1 PGLS regression analysis of the relationship between aerobiosis and GC content

From: Aerobic prokaryotes do not have higher GC contents than anaerobic prokaryotes, but obligate aerobic prokaryotes have

  

whole-genome GC content

GC content at 4FDS

GC content at ZRS

 

No. of species

λ

Slope

P

λ

Slope

P

λ

Slope

P

Aerobes + obligate aerobes (3) vs. anaerobes + obligate anaerobes (2)

884

1.0

0.44

0.552

1.0

−0.25

0.882

1.0

0.42

0.153

Aerobe (3) vs. anaerobe (2)

799

1.0

0.34

0.661

1.0

−0.29

0.865

1.0

0.36

0.239

Obligate aerobes (3) vs. obligate anaerobes (2)

85

1.0

8.82

0.004

1.0

15.0

0.023

1.0

4.36

6 × 10−4

Obligate aerobes (3) vs. anaerobes (2)

333

1.0

5.21

0.001

1.0

7.87

0.037

1.0

4.50

0.005

Obligate aerobes (3) vs. aerobes (2)

546

1.0

1.47

0.014

1.0

3.19

0.014

1.0

2.13

0.324

Aerobes (3) vs. obligate anaerobes (2)

551

1.0

3.26

0.077

1.0

6.75

0.096

1.0

−0.68

0.294

Anaerobes (3) vs. obligate anaerobes (2)

338

1.0

0.86

0.407

1.0

3.50

0.143

1.0

−2.26

0.225

  1. The numbers in parentheses are those assigned to each group of organisms in PGLS regression analyses. The data used in this analysis are deposited in Additional file 2. 4FDS: 4-fold degenerate sites, ZRS: zerofold redundant sites