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Table 1 Detailed geographical environment information of different ethnic regions

From: Association of pigmentation related-genes polymorphisms and geographic environmental variables in the Chinese population

Ethnic

Residence

N

Altitude (m)

Longitude (°)

Latitude (°)

Atmosphere pressure (kPa)

Sunshine duration (hours)

Year-round average temperature (°C)

Tibetan

Naqu

4

4505

92.058

31.482

58

2879

11

Linzhi

9

2994

94.368

29.655

70

2005

11

Shannan

13

3572

91.78

29.243

65

2800

10

Shigatse

20

3844

88.887

29.273

63

3248

8

Lhasa

59

3651

91.129

29.659

64

3055

10

Total

105

      

Ewenki

Ewenki Autonomous Banner Huisumuhakemugacha

10

690

119.172

48.379

93

2900

3

Yiminhe Town, Ewenki Autonomous Banner

19

673

119.791

48.583

93

2900

3

Bayantuohai Town, Ewenki Autonomous Banner

21

617

119.762

49.143

94

2900

3

Dayan Town, Ewenki Autonomous Banner

23

682

120.558

49.237

93

2900

3

Ewenki Autonomous Banner, Xinihe East Sumu

27

788

120.3

48.867

92

2900

3

Total

100

      

Hainan-Han

Haikou City, Hainan

49

9

110.339

20.035

101

2041

24.4

Hui

Haiyuan County, Zhongwei City, Ningxia

5

1841

105.65

36.571

81

1609

11

Guyuan City, Ningxia

10

1778

106.249

36.022

82

1602

9

Tongxin County, Wuzhong City, Ningxia

85

1316

105.816

36.986

86

1690

12.5

Total

100

      

Li

Wangxia Town, Changjiang, Hainan

5

357

109.157

19.009

97

2300

26

Baoting Li and Miao Autonomous County

8

54

109.707

18.647

101

2300

26

Changjiang Li Autonomous County, Hainan

38

140

109.062

19.304

100

2300

26

Qicha Town, Changjiang, Hainan

48

107

109.062

19.118

100

2300

26

Total

99

      

Mongolian

Chenqiba Town, Inner Mongolia

19

597

119.446

49.334

94

3205

7.7

Hohhot

81

1056

111.668

40.819

89

2588

7.3

Total

100

      

Miao

Gaopo Township, Huaxi District, Guiyang City

39

1459

106.819

26.302

85

1060

14.8

Mengguan Township, Huaxi District, Guiyang City

50

1196

106.755

26.415

88

1060

14.8

Total

89

      

Uighur

Bazhou

23

944

86.152

41.77

90

2990

11.5

Ili

23

646

81.331

43.923

94

2977

5.8

Aqsu

30

1109

80.314

41.15

89

2911

12.5

Kashgar

30

1298

75.996

39.476

87

2760

13

Total

106

      

Shaanxi-Han

Yan’an

1

1070

109.496

36.591

89

2056

15.5

Hancheng

1

457

110.449

35.483

96

2056

15.5

Fuping

2

520

109.364

34.95

95

2056

15.5

Weinan

3

355

109.516

34.506

93

2056

15.5

Xi’an

40

381

108.947

34.27

96

2056

15.5

Total

47

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