Table 2.

Distances Between Gene Orthologs and Rates of Synonymous Substitution

		Sorghum-maize (6/1/10/4)		Sorghum-maize (9/5/2/10)		Maize-maize
Gene	Chars.	Ks	Ka	Ks	Ka	Ks	Ka	Rate × 10−9 (95% CI)
pg1 (6-9)a	2415	0.147 (0.022)	0.050 (0.007)	0.134 (0.020)	0.043 (0.006)	0.164 (0.023)	0.064 (0.008)	6.38 (±0.37)
pg2 (6-9)	2229	0.157 (0.021)	0.024 (0.004)	0.207 (0.024)	0.033 (0.005)	0.210 (0.023)	0.036 (0.005)	8.29 (±0.41)
c1/p/1 (6-9)	924	0.322 (0.063)	0.080 (0.012)	0.233 (0.050)	0.072 (0.012)	0.301 (0.055)	0.074 (0.011)	12.61 (±1.41)
grf1 (6-9)	1026	0.296 (0.058)	0.080 (0.012)	0.244 (0.050)	0.044 (0.008)	0.330 (0.065)	0.111 (0.014)	8.39 (±0.86)
tb1/2 (1-5)	1194	0.166 (0.032)	0.037 (0.007)	0.219 (0.024)	0.070 (0.008)	0.257 (0.031)	0.090 (0.010)	16.67 (±1.69)
pg3 (1-5)	1407	0.348 (0.062)	0.063 (0.008)	0.278 (0.051)	0.060 (0.008)	0.299 (0.050)	0.057 (0.007)	9.49 (±0.87)
tbp1/2 (1-5)	603	0.183 (0.053)	0.028 (0.009)	0.136 (0.043)	0.029 (0.010)	0.118 (0.006)	0.0001 (0.00)	11.61 (±1.49)
pg4 (1-5)	309	0.320 (0.093)	0.068 (0.016)	0.216 (0.087)	0.093 (0.020)	0.324 (0.146)	0.085 (0.020)	13.03 (±2.68)
r1/b1 (10-2)	2019					0.309 (0.042)	0.088 (0.010)	15.70 (±1.15)
sorghum1		0.431 (0.052)	0.088 (0.010)	0.255 (0.035)	0.092 (0.010)
sorghum2		0.420 (0.052)	0.073 (0.009)	0.288 (0.039)	0.075 (0.009)
gp (10-2)	501	0.133 (0.041)	0.023 (0.008)	0.137 (0.043)	0.010 (0.005)	0.128 (0.038)	0.035 (0.010)	6.75 (±0.76)
orp1/2 (4-10)	1128	0.311 (0.042)	0.007 (0.003)	0.267 (0.037)	0.006 (0.002)	0.307 (0.043)	0.008 (0.003)	7.50 (±0.52)

Ks/Ka refer to estimates of synonymous/nonsynonymous distance between two sequences. Standard deviations are shown in parentheses. Rates of synonymous substitution with 95% confidence interval are presented in the rightmost column.

^aNumbers in parentheses refer to chromosomal location.