Table 1.

Comparisons of CpDNA Features among Cycas, Cryptomeria, and Two Pinaceae Subfamilies

	Features	Cycadaceae	Cupressaceae	Abitoideae		Pinoideae
Cycas taitungensis	Cryptomeria japonica	Cedrus deodara	Keteleeria davidiana	Cathaya argyrophylla	Pinus thunbergii	P. koraiensis
Size (bp)	163,403	131,810	119,299	117,720	107,122	119,707	117,190
LSC length	90,216	NA	65,052	64,648	64,197	65,696	64,563
SSC length	23,039	NA	53,775	52,538	42,067	53,021	51,717
IR length	25,074	NA	236	267	429	495	455
% AT content	60.5	64.7	60.9	61.4	61.2	61.5	61.2
% Coding genes	57.2	60.8	56.4	57.7	58.7	56.7	57.7
Total	133	118	114	113	106	115	113
Number of protein-coding genes	87	82	75	75	70	75	73
Number of duplicated genes	15	2	6	5	3	6	5
Number of tRNA genes	38	32	35	34	32	36	36
Number of rRNA genes	8	4	4	4	4	4	4
Number of genes with introns	20	17	14	14	13	14	14