Table 3

Correlation between breadth of expression and level of selective pressure, dN/dS.

Breadth typea

C. impatiens

C. resedifolia


Flower development

-0.156

****^

-0.156

****^

Leaf development

-0.115

****^

-0.145

****^

Organs

-0.131

****^

-0.135

****^

Organ specificity τ

0.125

****^

0.113

****^

UV-B stress

0.061

**§

0.036

NS

Salt stress

0.057

**§

0.070

***§

Osmotic stress

0.039

*

0.057

**§

Drought stress

0.050

*

0.032

NS

Cold stress

0.043

*

0.052

**§


* Spearman's P < 0.05, ** P < 0.01, *** P < 0.001, **** P < 0.0001, NS = non significant.

^ partial correlations are significant after correcting for the length of the A. thaliana orthologue.

§ significant after Holm-Bonferroni multiple test correction (only for stress responses, n = 10)

a Breadth of expression can be either spatial (i.e., number of tissues in which a gene is expressed) or temporal (when a gene is expressed, during either development or stress exposure). Note that the organ-specificity index τ is inversely correlated with the number (breadth) of organs at which a gene is expressed.

Ometto et al. BMC Evolutionary Biology 2012 12:7   doi:10.1186/1471-2148-12-7

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