Table 2.

Parsimony estimates of recent rates of intron gain (per gene per 10⁹ years) for some better studied lineages

Ref(s).	Gene set	Rate (intron/gene/By)	Lineage* (tree; calibration time in My)
15, 22	16,590 h	0.0034–0.0127	C. elegans ((((((Cb,Cr),Csp4),Ce),Bm),Hs),Sp); 100
24	4,690 h	0.0023	C. neoformans ((Cnn,Cng),(CgR,CgW)); 37
16	1,447 h	0.66	Three ascomycete fungi (((Mg,Nc),Fg),An); 630
19, 23	2,563 p	0.30–0.90	A. thaliana (((At1,At2),Le),Os); 20–60
20	3,101 p	0.15	O. sativa ((Os1,Os2),At); 70
21, 26	3,479 p	0.0014–0.0115	P. falciparum (((((Pk,Pv),Py),Pf),Pg),(Ta,Tp)); 100

The number next to each tree is the duration (My; from references in the leftmost column) of the branch over which rates are calculated (underlined). h, homolog; p, paralog.

*Species not given in Table 1 are Cr and Csp4, Caenorhabditis remanei and sp. 4., respectively; Bm, Brugia malayi; Sp, Schizosaccharomyces pombe; Cnn and Cng, Cryptococcus neoformans var. neoformans and C. neoformans var. grubii, respectively; CgR and CgW, Cryptococcus gattii strains R265 and WM276, respectively; Mg, Magnaporthe grisea; Nc, Neurospora crassa; Fg, Fusarium graminearum; An, Aspergillus nidulans; At1 and At2, Arabidopsis thaliana duplicates 1 and 2, respectively; Le, Lycopersicon esculentum; Os1 and Os2, Oryza sativa duplicates 1 and 2, respectively; Pk, Pv, Py, Pf, and Pg, Plasmodium knowlesi, P. vivax, P. yoelii, P. falciparum, and P. gallinaceum, respectively; Ta and Tp, Theileria annulata and T. parva, respectively.