Table 2

Response to selection and estimates of initial () and mutational () heritabilities in the four populations

Population

Estimated parameters

Late-NVL F252

Early F252

Late MBS

Early MBS


28.35

21.31

38.45

34.95

Rb

0.34***

- 0.18***

0.40***

- 0.04ns

R s.e.c

0.081

0.044

0.039

0.030


Model 1

* 10-2

2.9 (1.3-6.1)

1.4 (0.7-2.9)

3.3 (1.9-6.9)

0.3 (0.0-0.8)

Model 2

* 10-2

20.8 (9.7-44.0)

12.5 (5.8-25.8)

28.4 (16.5-56.8)

2.4 (0.0-6.4)

Model 3

* 10-2

1.2

0.5

4.8

ns

* 10-2

2.5 (1.03-5.79)

1.3 (0.5-2.8)

1.9 (0.49-5.36)

ns


a Average genotypic value at G7. b Response to selection as estimated using (3). Significance is indicated (*** = p < 0.001, ns = non significant). c standard error of R.

Heritabilities are computed from the average response to selection as the ratio of the additive genetic variance to the residual variance by using an EM algorithm (11 and 9). In parentheses are the 95% confidence intervals that were simulated by taking into account uncertainty in the estimated response to selection and in the residual variance, (see Material and Methods). Genetic variance is assumed to come either from new mutations (Model 1, = 0) or from standing variation (Model 2, = 0) or else from both (Model 3). In Model 3, the value for corresponds to the minimum value which gives a non zero estimate of the mutational heritability.

Durand et al. BMC Evolutionary Biology 2010 10:2   doi:10.1186/1471-2148-10-2

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