Table 2

Estimated dates of the duplication events leading to pairs of SET genes in Populus and Arabidopsis

Species

Duplicated pair

Number of anchors

Mean Ks

SD Ks

Estimated time (Mya)


Populus

Suvh2

Suvh9

777

0.2674

0.0922

14.69


Suvh3

Suvh10

84

0.2841

0.1030

15.61


Suvh4b

Suvh4c

14

0.2566

0.0642

14.10


Suvh7

Suvh1

105

0.2597

0.0715

14.27


Suvr1

Suvr2

176

0.283

0.0956

15.55


Suvr4a

Suvr4b

15

0.2898

0.0978

15.93


Suvr5a

Suvr5b

19

0.2686

0.0968

14.76


Atxr5a

Atxr5b

118

0.2737

0.0927

15.04


Atxr6a

Atxr6b

46

0.2657

0.0875

14.60


Ashh2a

Ashh2b

381

0.2683

0.0894

14.74


Ashh4

Ashh3

16

0.2568

0.0723

14.11


Atxr3a

Atxr3b

109

0.2758

0.0877

15.15


Clfa

Clfb

29

0.2844

0.0966

15.62


Swna

Swnb

394

0.2697

0.0842

14.82


Atx1

Atx2

11

0.2483

0.0665

13.64


Atx3a

Atx3b

394

0.2697

0.0842

14.82


Atx4

Atx5

46

0.2657

0.0875

14.60


Atxr7a

Atxr7b

566

0.2517

0.0548

13.83


Setd2a

Setd2b

1034

0.2594

0.0583

14.09


Atx4/5

Atx3a/b

46

1.5129

0.1836

83.13


Arabidopsis

SUVH3

SUVH7

177

0.8413

0.2201

28.04


SUVR2

SUVR1

33

0.8419

0.2180

28.06


SWN

MEA

41

0.8182

0.1871

27.27


ATX1

ATX2

113

0.8635

0.2162

28.78


ASHH4

ASHH3

138

0.8422

0.2319

28.07


The mean Ks value was calculated for each pair of protein-coding genes within a duplicated block and used to date the duplication events. Ks values of all duplicated gene pairs greater than 1.5 and less than 0.5 were discarded for Arabidopsis; Ks greater than 0.4 for Populus was also discarded, except Atx4/5 and Atx3a/b

Lei et al. BMC Evolutionary Biology 2012 12:51   doi:10.1186/1471-2148-12-51

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