Table 1

Substitution rates in conifer protein-coding genes compared to angiosperm genes

Pairwise comparison

Gene number

dS

d4

dN

μS (×10-9)

μ4D (×10-9)

μN (×10-9)

dN/dS


Gymnosperms:

3,723

0.1908

0.1769

0.0492

0.68

0.64

0.18

0.3137


Sitka spruce


Loblolly pine


Angiosperms:

4,080

2.1846

2.0057

0.2019

9.93

9.12

0.92

0.0924


Arabidopsis

17.02

15.63

1.57


Poplar

2.84

2.61

0.26


Fold-change


Angiosperm:conifers

11.4:1

11.4:1

4.1:1

14.6:1

14.4:1

5.2:1

1:3.4


Arabidopsis:conifers

25.0:1

24.7:1

9.0:1


Poplar:conifers

4.2:1

4.1:1

1.5:1


Mean genetic distances at synonymous (dS), 4-fold degenerate (d4) and non-synonymous (dN) sites are expressed as a number of substitutions per site. Absolute substitution rates are expressed in substitutions per synonymous (μS), four-fold degenerate (μ4D) and non-synonymous (μN ) site per year. Species-specific rates for angiosperms were estimated based on the 1:6 difference in evolutionary rate between poplar and Arabidopsis [57,58].

Buschiazzo et al. BMC Evolutionary Biology 2012 12:8   doi:10.1186/1471-2148-12-8

Open Data