Table 2 Expression types for all genes in the study

Untested

Few transcripts present in any sample

19,391

Low-expression

Expression was too low to classify, but clearly present

8,488

E-only

Environmental response; gene expression levels change over the time-course, but there were no genotypic differences

9,208

E-ambiguous

Expression levels change over the time-course; genotypic differences may be present but minor.

3,619

G-only

No environmental response, but a constant genotypic difference across time-points

75

GxE

A substantial genotypic difference between two time-points; genotype is conditioning environmental response

542

G + E

An environmental response and a constant genotypic difference across time-points

84

G + E- ambiguous

Response is either a GxE or G + E, but difficult to specify which.

1,437

Constant

Expression was constant between genotypes and across time-points

7,290

Ambiguous

Expression was too erratic across replicates to classify.

3,511

Total

53,645