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

similar between 25% and 28% for all populations except NRW with 14%. More than
62% of the pigs in B but less than 15% in LS and NRW were inbred. Proportions of
inbred pigs in SH and BW were 50.10% and 41.19%, respectively. The highest
values for percentage of inbred pigs with 65.56% as well as for the maximum
individual inbreeding coefficient with 28.65% were found when analyzing the whole
pedigree.
Measures of connectedness
As shown in Table 3, all five herdbook populations had boars in common. The
number ranged from 67 (NRW - SH) to 248 (B-BW). North Rhine-Westphalia shared
the lowest number of boars with SH, B and LS. In contrast, B and BW had the
highest average number of common ancestors with any other populations.
Table 3: Common boars represented in each pair of herdbook populations.
B BW LS NRW SH
Bavaria (B)
Baden-Württemberg (BW) 248
Lower Saxony (LS) 141 112
North Rhine-Westphalia (NRW) 85 121 95
Schleswig-Holstein (SH) 117 101 96 67
Estimates of GS between the five populations for the whole time period are shown in
Table 4. The GS ranged from 5.71% (NRW-BW) to 20.36% (BW-B). The contribution
to GS by population varied from 18.87% / 81.13% (NRW-SH) to 52.31% / 47.69%
(LS-NRW). For six pairs of populations the contribution to the GS was relatively
balanced with values between 40% and 60%.
Table 4: Genetic similarities between herdbook populations (in % above diagonal) and the
contribution by herdbook population in column (in % below diagonal).
B BW LS NRW SH
Bavaria (B) 20.36 14.29 6.94 11.49
Baden-Württemberg (BW) 47.04 8.67 5.71 8.73
Lower Saxony (LS) 66.24 57.49 9.99 14.78
North Rhine-Westphalia (NRW) 72.06 60.67 52.31 10.70
Schleswig-Holstein (SH) 56.60 52.63 29.36 18.87
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