Table 3.

Statistical analysis of intron number across different subfamilies

LRR-RLK Subfamily	Number of genes	Minimum number of introns	Maximum number of introns	Average number of introns*	Standard deviation
XIIIb	16	22	42	27.2aA	4.20
VIII-1	50	4	32	16.6bB	5.24
V	45	4	35	15.9bB	5.00
I-1	141	1	26	11.3cC	3.85
XIIIa	19	4	20	10.6cdC	4.49
VI-2	29	4	13	9.4dC	2.72
II	70	2	20	9.4dC	2.79
VI-1	33	4	12	6.6eD	1.50
I-2	17	5	10	6.3eD	1.10
XIV	15	3	6	3.5fE	0.92
IV	20	3	6	3.4fgE	0.88
XII-1	283	0	14	2.6fghEF	2.26
VII-2	15	0	16	2.1fghiEFG	3.97
XI-2	17	0	22	2.0fghiEFG	5.23
III	264	0	18	1.8ghijEFG	2.08
XI-1	396	0	11	1.7hijEFG	1.48
IX	39	1	5	1.2hijFG	0.68
VII-1	30	1	2	1.1hijFG	0.25
Xb-2	7	0	2	0.9ijFG	0.69
Xb-1	63	0	10	0.7ijFG	1.69
XV	13	0	7	0.6ijFG	1.94
Xa	23	0	2	0.3jG	0.56
VII-3	17	0	1	0.2jG	0.44

* Significant difference analysis was performed by Duncan’s test. Lower letters indicate significant difference (P < 0.05); upper letters indicate extreme significant difference (P < 0.01)