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Table 4 Two sample (pair-wise) nonparametric Wilcoxon test P values (Csl family in the column vs. in the row)

From: The cellulose synthase superfamily in fully sequenced plants and algae

All plants (a)

CslA

CslC

cesA

CslD

Seed plants (b)

CslA

CslC

cesA

CslD

CslF

0.1584*

2.76e-05

7.44e-07

0.0009

CslF

0.2707*

5.66e-06

1.26e-07

0.0065

CslB

3.36e-05

1.10e-06

5.56e-08

2.05e-06

CslB

3.52e-05

4.93e-10

1.78e-08

3.93e-08

CslH

0.0307

0.0012

0.0006

0.0033

CslH

0.0349

7.06e-05

0.0002

0.0020

CslE

0.0017

8.94e-07

3.64e-08

6.22e-06

CslE

0.0028

7.27e-09

3.43e-09

3.46e-06

CslG

3.97e-05

1.84e-07

2.94e-09

3.34e-07

CslG

5.26e-05

1.07e-10

5.71e-10

1.21e-08

CslJ

0.2187*

0.0261

0.0156

0.0463

CslJ

0.2554*

0.0178

0.0010

0.0805*

Dicot plants (c)

CslA

CslC

cesA

CslD

Monocot plants (d)

CslA

CslC

cesA

CslD

CslB

0.0010

4.99e-08

4.97e-08

3.23e-08

CslF

0.3520*

0.0008

8.69e-06

0.0521*

CslE

0.0185

2.04e-06

9.67e-07

0.0001

CslH

0.0399

0.0019

0.0013

0.0063

CslG

0.0017

3.77e-09

2.13e-09

3.18e-08

CslE

0.0386

0.0024

0.0007

0.0112

CslJ

0.0933*

0.0003

0.0006

0.0123

     
  1. In a hypothesis testing, a P-value is usually calculated to indicate if the null hypothesis is statistically supported. In this case, genes of Csl families in the column are tested against those in the row in terms of their Ka/Ks values. The null hypothesis is that the column is equal to the row, and the alternative hypothesis is that the column is larger than the row. If the P-value is less than 0.05, the null hypothesis is rejected and the alternative hypothesis is statistically significantly supported. This table shows that except for a very few cases (those with asterisks), the columns are always significantly larger than the rows.