Genetic structure and mating system of wild cowpea populations in West Africa

BMC Plant Biology

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.

ISSN: 1471-2229