Table 5.

Test for Relaxed Selection of IR Genes in Seven Species of Santalales

Gene	Test and Reference Branches	Relaxation Coefficient (k)	P Value	Likelihood Ratio (LR)	AICc Null	AICc Alternative
rpl2	Obligate (4) versus other Santalales (3)	1.18	0.6533	0.20	2,973.30	2,975.17
	Obligate (4) versus facultative (2)	3.53	0.2776	1.18	2,987.23	2,988.13
	Parasitic (6) versus nonparasitic (1)	0.88	0.8305	0.05	2,972.70	2,989.33
rpl23	Obligate (4) versus other Santalales (3)	1.34	0.5754	0.31	1,192.24	1,194.13
	Obligate (4) versus facultative (2)	0.84	0.7473	0.10	1,200.95	1,203.09
	Parasitic (6) versus nonparasitic (1)	11.77	0.0382	4.30	1,192.24	1,190.14
rps7	Obligate (4) versus other Santalales (3)	1.28	0.8426	0.04	1,686.88	1,688.98
	Obligate (4) versus facultative (2)	1.20	0.8922	0.02	1,699.77	1,701.92
	Parasitic (6) versus nonparasitic (1)	0.97	1.0000	0.00	1,686.88	1,689.02
rps12	Obligate (4) versus other Santalales (3)	0.38	0.2730	1.20	892.37	893.40
	Obligate (4) versus facultative (2)	0.38	0.3065	1.05	905.74	906.97
	Parasitic (6) versus nonparasitic (1)	0.61	0.7092	0.14	892.37	894.46
ycf2	Obligate (4) versus other Santalales (3)	3.43	0.0000	21.93	29,701.22	29,681.30
	Obligate (4) versus facultative (2)	3.42	0.0000	17.87	29,700.87	29,680.73
	Parasitic (6) versus nonparasitic (1)	1.86	0.0657	3.39	29,699.85	29,698.47
Concatenated	Obligate (4) versus other Santalales (3)	3.91	0.0000	25.31	35,643.12	35,623.89
	Obligate (4) versus facultative (2)	3.11	0.0000	20.26	35,644.29	35,626.04
	Parasitic (6) versus nonparasitic (1)	2.18	0.0263	4.94	35,638.67	35,635.74
	Parasitic (6) versus nonparasitic (1 + 7)	2.13	0.0000	30.32	51,239.15	51,210.83

Note.—Numbers in parentheses are species with a given type of parasitism. The last comparison includes seven non-Santalales dicots.