Response to selection from generations G1 to G7 in the F252 (a) and MBS (b) populations. Flowering time was measured on S2 families for each genotype of the genealogies in a two years evaluation trial (2004 and 2005). For each population, the average genotypic values (circles) and the interval between the extremes genotypic values (dashed bars) are plotted against the number of generations. Black and Grey colors represent the Early and the Late population respectively. In the Late F252 population, we estimated genotypic values separately for the Late-NVL F252 (dark-grey) and the Late-VL F252 (light-grey). The response to selection is significant in all populations except the Early MBS (see Table 2). For example in G7, the Late MBS flowers on average 3 days later than both the initial seed lot (not shown) and the Early MBS population. Note that the Late-VL F252 genotypes at generation G6 and G7, all descend from a single individual at generation G4 (Figure 3).
Durand et al. BMC Evolutionary Biology 2010 10:2 doi:10.1186/1471-2148-10-2