Table 1.

Genomic features of the studied plants

Monocots
Genome size (Mbp)a
Sub-genome size (Mbp)
Ploidy level
Percent protein database matches
Relative gene densityb
Gene number per sub-genome
Genes per genome
Rice 400 400 2× 8.39 1 NA 41,000
Sorghum 750 750 2× 3.64 0.43 NA 33,400
Maize 2670 2670 2× 1.23 0.15 NA 40,300
Wild wheat 4000 4000 2× 0.67 0.08 NA 32,800
Barley 5400 5400 2× 0.51 0.06 NA 33,600
Bread wheat 16,800 5600 6× 1.44 0.17 98,640 295,900
Dicots
Arabidopsis 135 135 2× 22.22 1 NA 26,300
Soybean 1100 550 4× 6.03 0.27 29,110 58,200
Oilseed rape 1100 550 4× 6.78 0.30 32,720 65,400
Cabbage 760 760 2× 8.49 0.38 NA 56,600
Potato 2000 1000 4× 4.27 0.19 37,450 74,900
Tomato 1000 1000 2× 2.84 0.13 NA 24,900
Cotton 3000 1500 4× 4.07 0.18 53,550 107,100
Non-Angiosperms
Moss 380 380 2× 4.44 0.53 NA 20,600
Fern 9000 9000 2× 0.49 0.06 NA 42,300
Pine
21,600
21,600
2×
0.85
0.10
NA
224,300

a Genome sizes were taken from the Plant DNA C-values Database, Royal Botanic Gardens, Kew, UK (http://www.rbgkew.org.uk/cva1/database1.html), except for wild wheat (Li et al. 2004), fern (J. Banks, pers. comm.), Arabidopsis (http://www.arabidopsis.org; Round et al. 1997), and rice (http://www.rgp.dna.affrc.go.jp/cgi-bin/statusdb/irgsp-status.cgi). (NA) not applicable

b The relative gene density per genome or sub-genome was calculated relative to rice in monocots and non-angiosperms, and relative to Arabidopsis in dicots