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Table 3 Genetic diversity, alternative inbreeding measures and characterization of runs of homozygosity in Canadian pig breeds

From: Genetic diversity, extent of linkage disequilibrium and persistence of gametic phase in Canadian pigs

Parameter

 

Breed

 

Duroc

Landrace

Yorkshire

Crossbred

HE ± SD

0.37 ± 0.12

0.38 ± 0.12

0.37 ± 0.12

0.37 ± 0.11

HO ± SD

0.36 ± 0.12

0.37 ± 0.12

0.36 ± 0.11

0.42 ± 0.14

DST

0.30

0.31

0.30

0.28

MAF ± SD

0.28 ± 0.13

0.29 ± 0.13

0.28 ± 0.13

0.29 ± 0.13

Inbreeding coefficients

 FPED

mean ± SD

0.07 ± 0.03

0.04 ± 0.04

0.05 ± 0.04

0.00 ± 0.00

min

0.00

0.00

0.00

0.00

max

0.27

0.33

0.29

0.00

 FROH

mean ± SD

0.03 ± 0.01

0.05 ± 0.02

0.05 ± 0.02

0.01 ± 0.01

min

0.01

0.01

0.00

0.00

max

0.06

0.14

0.18

0.07

 FEH

mean ± SD

0.04 ± 0.06

0.03 ± 0.06

0.03 ± 0.06

−0.10 ± 0.04

min

−0.23

−0.17

−0.31

−0.17

max

0.37

0.33

0.32

0.16

 FVR

mean ± SD

0.04 ± 0.08

0.03 ± 0.07

0.03 ± 0.08

−0.11 ± 0.09

min

−0.12

−0.13

−0.12

−0.19

max

0.38

0.32

0.33

0.03

Runs of homozygosity

 NSEG

mean ± SD

16.72 ± 3.66

23.19 ± 6.80

25.88 ± 5.71

8.25 ± 3.92

min

2

0

0

2

max

28

45

45

38

 KB

mean ± SD

67,468 ± 18,889

112,729 ± 46,956

119,948 ± 42,314

26,519 ± 17,652

min

5,393

0

0

5,050

max

138,427

353,376

445,224

178,955

 KBAVG

mean ± SD

4,033 ± 745

4,808 ± 1,519

4,584 ± 1,269

3,204 ± 1,047

min

2,573

0

0

2,262

max

9,345

13,110

13,492

12,194

 NSNP

91.24

113.80

108.60

76.38

 Density

43.68

41.67

41.59

41.72

  1. F EH , F VR , F ROH and F PED inbreeding coefficients based on excess of homozygosity, VanRaden, runs of homozygosity and pedigree, respectively, NSEG Average number of segments for the individual declared homozygous, KB Average of total number of kb contained within homozygous segments, KB AVER Average size of homozygous segments, NSNP average number of SNPs in run, min minimum, max maximum; SD standard deviation