Table 1.

Organisms used in this study and information about their genomes^a

Taxon	Assembly size (Mb)	Deserts (n)	Deserts (%)	18S GenBank accession number
P. troglodytes	3175.6	949	36.80	AC183378
H. sapiens	3047.0	915	38.33	NR_003286
M. mulatta	2863.7	810	30.44	CN805008
M. musculus	2654.9	895	34.26	NR_003278
R. norvegicus	2718.9	743	23.19	X01117
C. lupus familaris	2445.1	552	20.14	DQ287955
B. taurus	2422.9	149	4.26	DQ222453
E. caballus	2367.1	573	23.13	AJ311673
M. domestica	3431.4	1098	27.77	AJ311676
O. anatinus	1843.0	161	8.37	AJ311679
G. gallus	1031.9	200	16.13	AF173612
D. rerio	1277.1	129	7.10	XR_045186
O. latipes	724.2	29	6.06	AB105163
G. aculeatus	400.9	0	0.00	DW607648
T. nigroviridis	217.4	5	1.17	AJ270032
C. intestinalis	938.1	0	0.00	AB013017
A. gambiae	228.2	0	0.00	AM157179
D. melanogaster	120.4	0	0.00	EU188739
C. elegans	100.3	0	0.00	AY284652
C. briggsae	91.2	0	0.00	U13929
A. fumigatus	29.4	0	0.00	NT_166520
C. glabrata	12.3	0	0.00	AF114470
S. cervisiae	12.1	0	0.00	J01353
Z. mays	1979.4	0	0.00	NC_008332
A. thaliana	119.2	0	0.00	X16077
O. sativa	370.8	0	0.00	AY120865
V. vinifera	303.1	0	0.00	AF321270
O. lucimarinus	13.2	0	0.00	DQ007077
L. major	32.8	0	0.00	NC_007268
P. falciparum	22.9	0	0.00	NC_004325

Deserts (n)—number of gene deserts (>500 kB) in a given genome; deserts (%)—size fraction of gene deserts (>500 kB) in a given genome; 18S acc. no

^aGenBank accession numbers of 18S sequences used for regression equation mapping are also given. Data were obtained from GenBank. Note that no information on the size of intergenic regions was available for A. thaliana, A. fumigatus, L. ajor, O. sativa, and Z. mays. Also note that assembly size does not necessarily equal actual genome size