num	length	ars_name	cen_name
1	230218	chr1		chrI
2	813184	chr2		chrII
3	316620	chr3		chrIII
4	1531933	chr4		chrIV
5	576874	chr5		chrV
6	270161	chr6		chrVI
7	1090940	chr7		chrVII
8	562643	chr8		chrVIII
9	439888	chr9		chrIX
10	745751	chr10	chrX
11	666816	chr11	chrXI
12	1078177	chr12	chrXII
13	924431	chr13	chrXIII
14	784333	chr14	chrXIV
15	1091291	chr15	chrXV
16	948010	chr16	chrXVI