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Table 2 Mean x2' with Increasing Genetic Distance

From: Linkage disequilibrium compared between five populations of domestic sheep

 

Population

Distance bin

WFS

PD

MER

MxB

EMAI

0–5 cM

0.167 (0.076)

0.151 (0.086)

0.084 (0.048)

0.120 (0.064)

0.283 (0.199)

5–10 cM

0.129 (0.063)

0.111 (0.056)

0.084 (0.051)

0.075 (0.051)

0.192 (0.131)

0–10 cM

0.156 (0.073)

0.139 (0.079)

0.084 (0.048)

0.102 (0.062)

0.250 (0.179)

10–20 cM

0.139 (0.056)

0.100 (0.032)

0.072 (0.035)

0.096 (0.054)

0.067 (0.055)

20–30 cM

0.098 (0.030)

0.096 (0.110)

0.062 (0.037)

0.060 (0.034)

0.042 (0.030)

30–40 cM

0.095 (0.033)

0.096 (0.033)

0.063 (0.033)

0.072 (0.033)

0.028 (0.017)

40–115 cM

0.105 (0.055)

0.096 (0.065)

0.073 (0.032)

0.093 (0.047)

0.042 (0.034)

Non-syntenic

0.099 (0.047)

0.088 (0.047)

0.073 (0.033)

0.087 (0.047)

0.048 (0.071)

n Marker Pairs

     

Syntenic

153

153

171

171

120

Non-Syntenic

198

198

207

207

180

Critical Threshold 5%

0.141

0.065

0.151

0.151

0.053

b j from formula 3

0.802

1.066

9.015

4.875

0.239

  1. Mean values for x2' (standard deviation) were calculated following classification of marker pairs into distance bins. The number of both syntenic and non-syntenic marker pairs used for the calculation of mean x2' are given for each population. The x2' value which corresponds to the 5% level of significance is given for each population. This appears as a horizontal red line in Figure 2. The decay of LD with distance is quantified using b j (formula 3).