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Table 2 SNPs genomic distribution among chromosomes

From: Extensive genomic characterization of a set of near-isogenic lines for heterotic QTL in maize (Zea mays L.)

Chromosomes

SNP distribution

No.

Length (Mbp)

%a

Total

Polymorphic

Monomorphic

PM ratio

   

(T)

(P)

(M)

 
   

No.

%b

No.

%c

No.

%c

 

1

300.2

14.7%

6,812

15.9%▲

2,272

33.4%

4,540

66.6%▲

▼

2

234.8

11.5%

4,910

11.5%

1,625

33.1%▼

3,285

66.9%

▼

3

230.6

11.3%

4,697

11.0%

1,730

36.8%

2,967

63.2%▼

▲

4

247.1

12.1%

4,770

11.2%▼

1,752

36.7%

3,018

63.3%▼

▲

5

216.9

10.6%

4,640

10.8%

1,444

31.1%▼

3,196

68.9%▲

▼

6

169.3

8.3%

3,468

8.1%

1,238

35.7%

2,230

64.3%

 

7

171.0

8.4%

3,539

8.3%

1,361

38.5%▲

2,178

61.5%▼

▲

8

174.5

8.5%

3,712

8.7%

1,212

32.7%

2,500

67.3%▲

▼

9

152.4

7.4%

3,151

7.4%

1,192

37.8%▲

1,959

62.2%▼

▲

10

149.7

7.3%

3,072

7.2%

1,111

36.2%

1,961

63.8%

 

Total

2,046

100%

42,771

100%

14,937

34.9% d

27,834

65.1% d

 
  1. aChromosome length over total genome length; bnumber of SNPs per chromosome over total number of SNPs; cnumber of polymorphic (P) and monomorphic (M) SNPs over the total number of SNPs mapped on the respective chromosome; dnumber of polymorphic (P) and monomorphic (M) SNPs over total number SNPs. Up/down arrows indicate the sign of significant (P < 0.05) deviations from the expected SNP distribution among chromosomes for the corresponding tested null hypotheses, namely: uniform distribution of total SNPs (T); uniform distribution of polymorphic SNPs (P); uniform distribution of monomorphic SNPs (M); independent distribution of polymorphic vs. monomorphic SNPs from their mapping chromosome (PM ratio).
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BMC Genomics

ISSN: 1471-2164

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