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Table 4 SchemeA2: effects after ceasing selection at different threshold frequencies

From: Predicting the impact of selection for scrapie resistance on PRNP genotype frequencies in goats

T K-carrier frequency
Year (1)
5 6 7 8 9 10 11 12 13 14 15 16 17
Saanen
 > 0.4 0.50       0.53        0.10 (0.31)
 > 0.5   0.60       0.62       0.15 (0.38)
 > 0.6    0.69       0.70      0.22 (0.46)
 > 0.7     0.78       0.79     0.30 (0.54)
 > 0.8      0.87       0.85    0.39 (0.62)
 > 0.9       0.94       0.90   0.48 (0.69)
 1          1     0.97 0.68 (0.82)
T K-carrier frequency
Year (1)
2 3 4 5 6 7 8 9 10 11 12 13 14
Chamois Coloured
 > 0.4 0.42       0.49        0.08 (0.28)
 > 0.5   0.55       0.58       0.12 (0.35)
 > 0.6    0.66       0.67      0.18 (0.42)
 > 0.7     0.74       0.75     0.26 (0.51)
 > 0.8      0.83       0.83    0.35 (0.59)
 > 0.9       0.91       0.88   0.44 (0.66)
 1          1     0.96 0.65 (0.81)
  1. T is the K-carrier frequency attained as a threshold at the last genotyping, after which selection ceases. For each T-value, the figures drawn up in the next columns are the K-carrier frequencies (average values for different patterns of age structure, as exemplified in Additional file 5) of the last genotyping (the former value) and the year at which the K-carrier frequency becomes constant (final frequency, i.e., the latter value).
  2. (1) KK frequency in progeny at the year that the K-carrier frequency becomes constant and the frequency of K allele in parenthesis.