Skip to main content

Table 4 Summary statistics of runs of homozygosity (ROH) calculated in simulated populations with base allele frequencies of 0.5 over 20 replicates, using SNP1101 software (minimum window size = 20SNP, genotype error = 0.001)

From: Inbreeding and runs of homozygosity before and after genomic selection in North American Holstein cattle

Generation

Number of ROHs ± standard error

Minimum ROH length(SNP) ± standard error

Maximum ROH length(SNP) ± standard error

Average ROH length(SNP) ± standard error

 

Random selection

5

3.9 ± 0.05a

217.3 ± 6.21a

898.2 ± 15.00a

488.9 ± 8.00a

20

5.2 ± 0.05a

94.2 ± 1.19d

676.7 ± 4.95a

307.9 ± 1.25b

40

15.8 ± 0.12a

30.5 ± 0.21d

746.0 ± 5.13a

207.4 ± 0.89a

60

30.4 ± 0.24a

23.6 ± 0.11d

769.7 ± 4.50a

163.2 ± 0.41a

 

Phenotype selection

5

4.0 ± 0.07a

231.3 ± 7.93a

958.6 ± 14.48b

520.0 ± 8.98b

20

10.1 ± 0.21b

51.1 ± 0.92c

885.1 ± 9.97b

306.3 ± 1.65ab

40

34.8 ± 0.58b

24.4 ± 0.13c

959.8 ± 9.50b

212.7 ± 1.23b

60

66.0 ± 0.77b

21.6 ± 0.11c

971.8 ± 10.26b

172.1 ± 1.06b

 

BLUP-EBV selection1

5

4.2 ± 0.06b

230.9 ± 4.58a

973.71 ± 9.13b

527.2 ± 4.63b

20

25.4 ± 0.58d

30.8 ± 0.24a

1246.8 ± 18.90d

317.1 ± 3.30c

40

74.0 ± 0.82d

22.1 ± 0.09a

1511.7 ± 27.07d

264.4 ± 3.38d

60

110.6 ± 0.89c

21.2 ± 0.10b

1729.6 ± 18.29d

273.5 ± 3.03d

 

GEBV selection2

5

3.8 ± 0.07a

254.1 ± 5.07b

947.5 ± 8.92b

534.4 ± 3.43b

20

17.0 ± 0.42c

36.5 ± 0.46b

1050.2 ± 12.71c

303.3 ± 2.57a

40

62.9 ± 0.67c

22.4 ± 0.11b

1179.9 ± 14.49c

220.8 ± 1.91c

60

113.4 ± 0.90d

21.0 ± 0.00a

1242.9 ± 10.84c

197.3 ± 1.76c

  1. 1Selection based on best linear unbiased prediction estimated breeding value
  2. 2Selection based on genomic estimated breeding value
  3. Different letters indicate statistical significance within the same equivalent generation and each column (P < 0.05)