Table 1.

Gene Conversion Rates and Ages of Homologous Strata Inferred on Chromosomes R11, R12, S5, and S8

StrataChromosomePhysical Location (Mb)Gene No.Gene DensityaColinear GenesbQuartet No.cConversion RatedKs MedianDate (mya)P Valuee
Rice-specific
 RSAR110.00–0.1417123.3811f410.005<0.5RSA–RSB 3.89E-04
R120.00–0.131396.42
 RSBR110.14–2.19245119.72131670.910.1159.4RSB–RSC 7.37E-12
R120.14–2.22256122.89
 RSCR112.21–2.7259114.3529170.470.47739.1RSC–CSA 1.75E-07
R122.23–2.987093.38
Sorghum-specific
 SSAS50.03–0.6779123.8139270.930.16313.4SSA–SSB 5.83E-13
S80.01–0.8487104.37
 SSBS50.73–4.23359102.4567610.560.48659.7SSB–CSA 6.86E-11
S80.86–4.29351102.4
Common to rice and sorghum
 CSAR112.74–7.7635470.538340.080.79465.1CSA–CSB 5.00E-02
R122.98–5.7119872.65
S54.24–8.9050352.78410
12.06–16.93g
S84.30–10.1432755.92
 CSBR117.79–28.8697146.08371300.98580.7CSB–CSC 2.03E-01
R125.76–22.8471241.67
S511.62–12.06114927.8110
18.66–59.55
S810.73–47.5263617.29
 CSCR1129.03–30.6611771.8981000.65353.5
R1222.87–23.8093100.81
S560.21–61.37119102.7590
S847.85–48.585372.31
  • a Gene number per Mb.

  • b Numbers of those colinear genes estimated with their Ks values.

  • c Quartets with good alignment.

  • d Bootstrap percentage > 0.8.

  • e Wilcoxon rank-sum test.

  • f Three additional genes annotated by the authors.

  • g An inversion in S5 produced two segments of CSA therein.