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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.
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Veterinary Research

ISSN: 1297-9716