Table 2.

Comparison of duplications of genes of NB-LRR and LRR-RLK in maize genome.

Gene type	NBS-LRR	LRR-RLK
Total number of genes	151	226
Single-gene families	94	117
Single-genes	94	117
Singletons	56	100
Multigene families	16	46
Multigenes	56	110
Maximal family members	14	5
Average members per family	3.5	2.4
Paired genes	14	36
Number of gene clusters	9	0
Clustered genes	42	0
Percentage of multigenes	37.09	48.67