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 (tm – ts) 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.