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Table 5 Distribution of records for body weight traits in different inbreeding classes of animals grouped by the type of birth and born between 1994 and 2011

From: Population genetic structure analysis and effect of inbreeding on body weights at different ages in Iranian Mehraban sheep

Birth type Inbreeding class   Traits (kg)         
BW   WW   6 MW   9 MW   YW  
   N Mean ± SE N Mean ± SE N Mean ± SE N Mean ± SE N Mean ± SE
  F= 0 1344 3.96 ± 0.47a 681 22.44 ± 4.92a 281 34.66 ± 8.13a 33 39.07 ± 8.29b 12 50.20 ± 0.01a
Single 0< F<0.05 6820 3.87 ± 0.68a 4476 21.98 ± 4.59a 3317 36.73 ± 7.47a 2198 45.78 ± 6.66a 1474 52.35 ± 8.73a
  F ≥ 0.05 11 3.85 ± 0.65a 6 22.37 ± 3.36a 6 36.22 ± 5.51a 6 46.57 ± 3.36a 4 52.60 ± 3.99a
  F= 0 192 3.33 ± 0.46a 121 22.61 ± 4.19a 67 34.41 ± 5.83b - - - -
Twin 0< F<0.05 1880 2.96 ± 0.77b 1427 22.55 ± 3.92a 1186 36.71 ± 6.24ab 897 44.76 ± 5.77b 524 53.65 ± 5.28b
  F ≥ 0.05 8 2.59 ± 0.83c 4 18.98 ± 1.69b 5 39.00 ± 2.53a 5 48.98 ± 0.67a 5 57.56 ± 1.28a
  1. a,b,cMeans with similar letters in each sub class within a column do not differ significantly at P<0.05. BW: birth weight, WW: weaning weight, 6 MW: 6-month weight, 9 MW: 9-month weight, YW: yearling weight. F: inbreeding coefficient. SE: standard error.