Verena Gonzalez Lopez, 2011 - Institut für Tierzucht und Tierhaltung ...

contribution (%)
0 10 20 30 40 50 60
contribution (%)
0 10 20 30 40 50 60
a) b)
50 100 150 200
EBV
50 100 150 200
EBV
contribution (%)
0 10 20 30 40 50 60
contribution (%)
0 10 20 30 40 50 60
c) d)
50 100 150 200
50 100 150 200
EBV
Figure 5: Relation between estimated breeding values (EBV) of selected boars and
optimized contributions for different constraints on relationship in GENCONT a) 2.0%, b)
2.2%, c) 2.4%, d) 2.6% with restriction on maximal contributions (cmax = 0.1) of selected
boars (Schleswig-Holstein boars in black, Baden-Württemberg boars in red).
EBV
Optimal contribution selection combined with minimum coancestry mating
In Figure 6 the impact of minimum coancestry mating after applying optimum
contribution theory to select boars and sows is illustrated. Minimum coancestry
mating provided a mating plan with an average coancestry coefficient for matings
that are substantially lower than when they were mated at random.
As expected, on average the same expected breeding value of selected animals was
achieved with both mating schemes. By comparison, boars and sows mated at
random resulted in a much higher average coefficient. The reduction of average
minimum coancestry through minimum coancestry mating was in the range from 74%
up to 76% for SH boars. Including BW boars, average minimum coancestry could be
reduced by 64% to 69%. The decrease in average coancestry applying minimum
50