Table 1 Number and percentage of genes and SNPs identifed in the reference set and finally incorporated in the 62 K Axiom SNP chip ‘CcSNPnks’ for Affymetrix platform.

From: A 62K genic-SNP chip array for genetic studies and breeding applications in pigeonpea (Cajanus cajan L. Millsp.)

Sr. no.

Gene category

No. of reference genes

Total gene length (bp)

No. of SNPs identified

SNP density

per Kbp

Average gene size (bp)

No. of SNPs per gene

No. of genes in the chip

Percentage of genes in the chip

No. of SNPs in the chip

No. of SNPs per gene

1

SCP

10,064

12,218,733

430,380

35.2

1214

42.8

4314

44.80

24,537

5.7

2

CSCSP

5899

18,726,973

130,439

6.9

3175

22.1

4328

44.95

27,291

6.3

3

AGCP

192

617,039

13,979

22.7

3214

72.8

156

1.62

1536

9.9

4

DRDRP

874

2,907,123

48,387

16.6

3326

55.4

746

7.75

8090

10.8

5

MCP

96

201,088

22,477

111.8

2095

234.1

85

0.88

599

7.1

 

Total

17,125

34,670,956

645,662

18.6

2024

37.7

9629

100

62,053

6.4

  1. SCP = Single-copy genes unique to pigeonpea; CSCSP = Conserved single-copy genes between soyabean and pigeonpea, AGCP = Homologs of agronomically important cloned genes in pigeonpea; DRDRP = Disease resistance and defense response genes in pigeonpea; MCP = Multi-copy pigeonpea genes.