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Table 2 Descriptive statistics of runs of homozygosity (ROH) number and length (in Mb) by ROH length class (ROH 1–2 Mb, ROH 2–4 Mb, ROH 4–8 Mb, ROH > 8 Mb and total)

From: Genome-wide selection signatures detection in Shanghai Holstein cattle population identified genes related to adaption, health and reproduction traits

Class

No. of ROH

Percent (%)

Mean length

Standard deviation

Genome coverage (%)

ROH1 − 2 Mb

13,992

31.00

1.54

0.28

0.79

ROH2 − 4 Mb

20,915

47.00

2.84

0.57

2.16

ROH4 − 8 Mb

9279

21.00

5.08

0.89

1.72

ROH> 8 Mb

323

1.00

9.41

1.37

0.11

Total

44,509

100

2.95

1.49

4.8