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Table 3 Results of linkage disequilibrium analysis of allelic profile data from Cryptosporidium parvum at eight genetic loci

From: Population structure and geographical segregation of Cryptosporidium parvum IId subtypes in cattle in China

Populations

n

ISA

PMC

VD

L

VD > L

LD or LE

Guangdong

10

−0.0137

0.537

0.7091

1.3455

No

LE

Hebei

12

−0.0110

1

0.2564

0.5641

No

LE

Heilongjiang

5

1

Jiangsu

4

0.0286

1

0.2667

0.2667

No

LE

Shanghai

10

0.0816

0.067

1.9727

2.0182

No

LE

Xinjiang

5

−0.0128

0.472

1.2111

3.2111

No

LE

IIdA19G1

24

0.0272

0.175

1.2794

1.483

No

LE

IIdA20G1

17

0.0867

< 0.001

0.9638

0.8008

Yes

LD

IIdA15G1

5

−0.0128

0.472

1.2111

3.2111

No

LE

Total

46

0.0672

< 0.001

2.202

1.8848

Yes

LD

Guangdonga

6

−0.051

0.898

0.6

1.7429

No

LE

Hebeia

2

Heilongjianga

1

Jiangsua

2

< 0.001

Shanghaia

7

−0.0158

0.589

0.9476

2.2476

No

LE

Xinjianga

3

0.2321

0.029

2.3333

2.3333

No

LE

IIdA19G1a

12

−0.0695

0.986

0.5979

1.8287

No

LE

IIdA20G1a

2

< 0.001

IIdA15G1a

3

0.2321

0.029

2.3333

2.3333

No

LE

Totala

17

−0.0421

0.889

1.1307

2.3307

No

LE

  1. aConsidering isolates with the same MLG as one individual
  2. Abbreviations: n number of isolates; \(I_{A}^{S}\), standardized index of association calculated using the program LIAN 3.5; PMC, significance for obtaining this value in 1000 simulations using the Monte Carlo method; VD, variance of pairwise difference; L, 95% critical value for VD; VD > L, presence of linkage disequilibrium