Table 1 Characterization of the goat datasets in terms of admixture and shared IBD segments.

From: IBD sharing patterns as intra-breed admixture indicators in small ruminants

Dataset origin (number of breeds considered)

Proportion of “admixed” (Q < 0.85) breeds (“genetic integrity level”: mean; s.d.)

Mean length of IBD for “admixed” breeds - “slightly admixed” breeds (s.d.) Mb

Mean number of IBD for “admixed” breeds – “slightly admixed” breeds (s.d.)

Spearman correlations

Europe

South European dataset (32)

67.65% (0.71; 0.17)

5.71 (4.00) - 10.37 (1.73)***

9.81 (12.00) - 22.51 (18.07)*

 

North Europe (8)

12.5% (0.91; 0.19)

2.15 (single value) - 11.26 (2.65)

9.82 (single value) - 55.08 (38.18)

 

All European datasets (40)

60% (0.75; 0.19)

5.56 (3.98) - 10.76 (2.15)***

9.81 (11.73) - 36.76 (32.18)**

integrity level/IBD No: 0.52***

integrity level/IBD size: 0.63**

AV/IBD No: 0.77***

AV/IBD size: 0.71***

Asian dataset (19)

84.21% (0.65; 0.22)

7.06 (4.75) - 14.74 (2.55) nt

12.55 (12.54) - 53.42 (21.82) nt

integrity level/IBD No: 0.76***

integrity level/IBD size: 0.77***

AV/IBD No: 0.90 ***

AV/IBD size: 0.84***

Africa

East Africa (33)

70% (0.71; 0.20)

2.42 (3.21) - 6.46 (4.50)**

4.27 (9.02) - 16.44 (15.52)*

 

North and West Africa (19)

94.44% (0.57; 0.20)

2.87 (3.13) - 12.37 (single value)

1.03 (3.32) - 11.66 (single value)

 

All African datasets (52)

78.43% (0.66;0.21)

1.89 (3.09) - 6.99 (4.63)***

2.89 (7.28) - 16.00 (14.79)*

integrity level/IBD No: 0.37**

integrity level/IBD size: 0.39**

AV/IBD No: 0.68 ***

AV/IBD size: 0.67***

All datasets (111)

72.30% (0.69; 0.21)

3.98 (4.29) – 9.78 (4.03)***

6.82 (10.61) – 30.82 (28.28)***

integrity level/IBD No: 0.50 ***

integrity level/IBD size: 0.52 ***

AV/IBD No: 0.83 ***

AV/IBD size: 0.77 ***

  1. Statistical comparison of the mean “length” and mean “number” of IBD shared segments between “admixed” and “slightly admixed” breeds, and Spearman correlations between “AV index” or “genetic integrity level” and the “length” or “number of IBD shared”. s.d. standard deviation, No number, ns p value > 0.1, •0.1 < p value > 0.05, *p value ≤ 0.05, **p value ≤ 0.01, ***p value ≤ 0.001, nt not tested, due to size imbalance between the two groups.
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