Table 2 Descriptive statistics of copy number variation regions identified in the Italian chicken breeds

ANC

345

7

28

380

23,529,525

61,920

2,378

565,429

2.06

BPT

54

4

22

80

5,317,732

66,472

5,580

1,862,447

0.47

BSA

137

3

40

180

13,727,398

76,263

6,464

391,642

1.20

COR

202

6

37

245

13,959,094

56,976

8,570

582,168

1.22

MER

84

0

28

112

9,360,221

83,573

5,157

814,780

0.82

MOD

20

3

4

27

648,977

24,036

4,494

77,226

0.06

MUG

99

6

26

131

6,214,065

47,436

2,726

246,916

0.54

PER

54

0

14

68

4,847,736

71,290

7,526

472,494

0.42

PLB

51

2

9

62

3,880,517

62,589

4,389

276,030

0.34

PLN

82

0

10

92

5,010,687

54,464

1,750

347,761

0.44

PML

217

5

22

244

17,840,778

73,118

4,431

333,470

1.56

PPA

30

2

6

38

2,408,448

63,380

9,035

153,514

0.21

PPB

19

6

5

30

757,175

25,239

3,023

110,042

0.07

PPC

19

3

5

27

1,343,003

49,741

3,023

221,819

0.12

PPD

39

7

8

54

1,796,233

33,264

3,023

221,819

0.16

PPN

9

2

1

12

192,241

16,020

3,023

45,506

0.02

PPP

167

0

36

203

50,708,742

249,797

4,904

2,863,848

4.44

PRL

27

2

2

31

689,461

22,241

3,614

66,137

0.06

PRM

18

3

6

27

692,116

25,634

2,378

69,072

0.06

ROM

41

4

5

50

3,862,446

44,396

6,264

160,389

0.34

SIC

40

1

8

49

2,430,370

49,599

5,105

256,437

0.21

VLD

16

3

3

22

1,488,845

67,675

3,499

1,059,613

0.13

VLP

213

5

45

263

30,904,092

117,506

3,249

1,148,469

2.71

Total identify^*

1,084

36

54

1,172

155,598,588

317,459

1,750

2,929,354

13.64