Table 2

Outcrossing rates and inbreeding coefficient
Population Sample sizes tm± SE ts± SE (tm-ts) ± SE F Fe Fe - F
m n
BUR03 112 13 0.014 ± 0.007 0.014 ± 0.007 0.000 ± 0.000 0.649 0.972 0.323
BUR05 105 11 0.095 ± 0.035 0.064 ± 0.024 0.031 ± 0.017 0.458 0.826 0.368
BUR07 148 14 0.061 ± 0.007 0.044 ± 0.006 0.017 ± 0.004 0.990 0.885 −0.105
BUR16 108 13 0.013 ± 0.002 0.014 ± 0.002 0.000 ± 0.000 0.736 0.974 0.238
BUR23 102 11 0.028 ± 0.014 0.020 ± 0.014 0.008 ± 0.003 0.753 0.946 0.193
BUR27 110 12 0.050 ± 0.008 0.038 ± 0.007 0.012 ± 0.003 0.689 0.905 0.216
BUR29 106 12 0.010 ± 0.000 0.010 ± 0.000 0.000 ± 0.000 0.906 0.980 0.074
BUR32 98 11 0.010 ± 0.000 0.010 ± 0.000 0.000 ± 0.000 0.879 0.980 0.101
Mean BUR 0.035 ± 0.011** 0.027 ± 0.007** 0.009 ± 0.004(*) 0.758 ± 0.059** 0.934 ± 0.020** 0.176 ± 0.0532*
NIG05 146 15 0.063 ± 0.019 0.020 ± 0.010 0.044 ± 0.014 0.471 0.881 0.410
NIG09 214 24 0.010 ± 0.000 0.010 ± 0.000 0.000 ± 0.000 0.892 0.980 0.088
NIG10 172 20 0.016 ± 0.002 0.012 ± 0.001 0.004 ± 0.001 0.948 0.969 0.021
NIG11 182 18 0.010 ± 0.000 0.010 ± 0.000 0.000 ± 0.000 0.889 0.980 0.091
NIG12 276 28 0.037 ± 0.003 0.025 ± 0.002 0.012 ± 0.001 0.990 0.929 −0.061
NIG13 164 17 0.034 ± 0.004 0.022 ± 0.003 0.012 ± 0.002 0.990 0.934 −0.056
NIG14 126 13 0.058 ± 0.004 0.040 ± 0.003 0.017 ± 0.002 0.990 0.890 −0.100
mean NIG 0.033 ± 0.008* 0.020 ± 0.004* 0.013 ± 0.006(*) 0.881 ± 0.070* 0.938 ± 0.016* 0.056 ± 0.065 ns
Mean 0.034 ± 0.007*** 0.024 ± 0.004*** 0.010 ± 0.003** 0.815 ± 0.028*** 0.936 ± 0.013*** 0.125 ± 0.043*

tm is the multilocus population outcrossing rate, ts is the averaged single locus estimate of outcrossing rate, a positive and significant (tmts) reflects biparental inbreeding. F is the (minimum variance estimate of) single locus inbreeding coefficient of maternal parents, Fe is the expected inbreeding coefficient at equilibrium, (Fe-F) quantifies deviation from inbreeding equilibrium based on selfing rate (Fe). tm and ts were tested to differ from 1, the other parameters were tested to differ from zero. Significance levels correspond to the results of non-parametric Wilcoxon signed rank tests, ns for P > 0.1, (*) for P < 0.1, * for P < 0.050; ** for P <0.010 and *** for P < 0.001.

Outcrossing rates estimates and inbreeding coefficient were computed for 15 wild cowpea populations by comparing the inferred maternal genotypes to the progeny genotypes.

Kouam et al.

Kouam et al. BMC Plant Biology 2012 12:113   doi:10.1186/1471-2229-12-113

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