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Table 1 Mean number and length of ROH and genome-wide ROH-based inbreeding coefficients

From: Runs of homozygosity in Sable Island feral horses reveal the genomic consequences of inbreeding and divergence from domestic breeds

Population (n)

Mean N ROH

Mean ROH length (Mb)

Mean FROH

(min, max)

(min, max)

(min, max)

Sable Island (212)

139 (109, 212)

4.72 (2.50, 7.23)

0.29 (0.16, 0.42)

Clydesdale (24)

131 (99, 155)

4.94 (3.16, 6.02)

0.29 (0.14, 0.35)

Mangalara Paulista (14)

119 (89, 167)

5.00 (2.99, 6.39)

0.26 (0.19, 0.34)

Exmoor (24)

121 (65, 205)

4.72 (2.95, 7.49)

0.25 (0.08, 0.52)

Thoroughbred (Europe) (19)

121 (104, 139)

4.10 (3.66, 4.59)

0.22 (0.19, 0.25)

Thoroughbred (US) (17)

119 (97, 137)

4.11 (3.54, 5.14)

0.21 (0.17, 0.26)

Shetland (27)

118 (89, 228)

3.65 (2.76, 5.92)

0.19 (0.12, 0.32)

Standardbred (25)

87 (69, 102)

4.84 (3.45, 5.87)

0.19 (0.12, 0.24)

Arabian (24)

105 (84, 127)

3.67 (2.53, 7.48)

0.17 (0.09, 0.38)

Andalusian (18)

74 (52, 99)

5.02 (2.97, 9.68)

0.17 (0.08, 0.35)

Shire (22)

117 (24, 173)

3.35 (1.99, 4.37)

0.17 (0.02, 0.26)

French Trotter (17)

83 (71, 104)

4.30 (3.14, 5.42)

0.16 (0.10, 0.21)

North Swedish Horse (19)

89 (70, 132)

3.75 (2.85, 5.89)

0.15 (0.09, 0.23)

Norwegian Fjord (21)

78 (57, 96)

4.36 (3.17, 6.07)

0.15 (0.09, 0.21)

Saddlebred (25)

73 (55, 90)

4.41 (3.45, 5.80)

0.14 (0.09, 0.20)

Fell Pony (21)

79 (63, 109)

4.03 (2.81, 5.81)

0.14 (0.09, 0.19)

Franches-Montagnes (19)

73 (56, 91)

3.93 (3.35, 5.89)

0.13 (0.08, 0.23)

Belgian (30)

84 (58, 106)

3.54 (2.57, 4.68)

0.13 (0.08, 0.17)

Morgan (43)

67 (41, 113)

4.31 (2.51, 10.84)

0.13 (0.06, 0.33)

Puerto Rican Paso Fino (20)

79 (44, 103)

3.72 (1.97, 7.00)

0.13 (0.04, 0.32)

Akhal Teke (19)

80 (62, 97)

3.36 (2.48, 4.29)

0.12 (0.08, 0.16)

Swiss Warmblood (14)

78 (62, 101)

3.23 (2.73, 4.29)

0.11 (0.08, 0.19)

Hanoverian (15)

75 (48, 95)

3.21 (2.38, 3.78)

0.11 (0.05, 0.15)

Icelandic (25)

85 (70, 99)

2.65 (2.15, 5.71)

0.10 (0.07, 0.25)

Quarter Horse (40)

67 (51, 103)

3.42 (2.24, 6.01)

0.10 (0.06, 0.18)

Miniature (25)

71 (55, 91)

3.08 (1.98, 10.12)

0.10 (0.05, 0.34)

Percheron (20)

81 (49, 105)

2.74 (2.12, 3.74)

0.10 (0.05, 0.14)

Paint (25)

67 (46, 100)

3.08 (2.42, 4.57)

0.09 (0.06, 0.16)

Peruvian Paso (21)

62 (41, 77)

3.29 (2.11, 5.25)

0.09 (0.05, 0.16)

Finnhorse (27)

46 (29, 60)

3.21 (1.89, 4.72)

0.07 (0.03, 0.12)

Caspian (14)

48 (13, 95)

2.43 (1.81, 3.81)

0.06 (0.01, 0.11)

New Forest Pony (15)

44 (35, 56)

2.80 (2.18, 4.47)

0.05 (0.04, 0.10)

Tuva (15)

39 (24, 51)

2.83 (1.72, 6.28)

0.05 (0.02, 0.14)

  1. Values shown for individuals from 33 domestic horse breeds and Sable Island feral horses. Sample sizes and data ranges are shown in parentheses. Breeds are ordered by FROH values