Table 2 Summary statistics of the runs of homozygosity (ROH) based on length classes
Chicken population
Class of ROHLayersBroilersWild birds
WL (n= 25)BL (n= 25)BRA (n= 20)BRB (n= 20)RJF (n= 25)
0.3-1Mb9458 (73.9%)4631 (58.8%)2352 (70%)2820 (71.1%)1083 (51.6%)
1-2Mb2619 (20.4%)1866 (23.7%)593 (17.6%)718 (18.1%)504 (24.0%)
2-4Mb688 (5.4%)1001 (12.7%)327 (9.7%)350 (8.8%)330 (15.7%)
4-8Mb42 (0.3%)335 (4.3%)79 (2.3%)77 (1.9%)153 (7.3%)
8-10Mb023 (0.3%)6 (0.2%)4 (0.1%)17 (0.8%)
10-16Mb015 (0.2%)5 (0.1%)012 (0.6%)
>16Mb01 (0.01%)001 (0.05%)
Total N. a128077872336239692100
Mean N.b512.28314.88168.1198.4584
Total L. (Mb) c1080210189352639233365
Max. (Mb) d7.0421.8313.859.8517.92
Min. (Mb) d0.300.300.300.300.30
  • a Total N.: Total number of ROH detected in the population.

  • b Mean N.: average number of ROH per individual calculated as the Total N. divided by the number of individuals.

  • c Total L.: Total length of ROH detected in the population.

  • d Max, Min.: respectively revealed maximum and minimum length of ROH segments among the total number of ROH.