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Table 5 SchemeB2: effects on base herds 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 18
Saanen
 > 0.40 0.50      0.24         0.02 (0.13)
 > 0.50   0.60      0.31        0.03 (0.17)
 > 0.60    0.68      0.39       0.05 (0.22)
 > 0.70     0.77      0.47      0.08 (0.28)
 > 0.80      0.86      0.55     0.11 (0.33)
 > 0.90       0.94      0.62    0.15 (0.39)
 1          1     0.80 0.31 (0.56)
T K-carrier frequency
Year (1)
2 3 4 5 6 7 8 9 10 11 12 13 16
Chamois Coloured
 > 0.40 0.42      0.26         0.02 (0.14)
 > 0.50   0.55      0.33        0.03 (0.18)
 > 0.60    0.66      0.40       0.05 (0.23)
 > 0.70     0.74      0.48      0.08 (0.28)
 > 0.80      0.83      0.54     0.11 (0.33)
 > 0.90       0.92      0.62    0.15 (0.38)
 1          1     0.84 0.36 (0.60)
  1. T is the nucleus 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 nucleus K-carrier frequencies (average values for different patterns of age structure, as exemplified in Additional file 6) of the last genotyping in the nucleus (the former value) and the year at which the K-carrier frequency becomes constant for the overall population (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.