Review Article

The Transcriptomics of Secondary Growth and Wood Formation in Conifers

Table 1

Last releases relative to the number of inputs (ESTs) and output sequences (EST, ET, and TC) per forestry genus available on the Gene Index project database.

GenusInput sequencesUnique output sequences
ESTsESTsETs1TCs2

Quercus (OGI project)148,87622,470019,674
Pinus (PGI project)452,25632,33713144,858
Populus (PplGI)423,55650,06524850,563
Picea (Sgi project)541,49034,8662644,517

ETs: nonredundant transcripts (contain a set of nucleotide sequences that represent mature transcripts); TCs: tentative consensus sequences that are created by assembling ESTs into virtual transcripts, and they could be based on two or more ESTs (and possibly an ET) that overlap for at least 40 bases with at least 94% of sequence identity. They could comprise ESTs derived from different tissues.