Table 1.

Sample locations, sample sizes and the genetic diversity statistics for the 16 Arnebia szechenyi populations based on cpDNA, nDNA data sets (six nDNA loci and nrITS). H_d, cpDNA haplotype richness; π, nucleotide diversity; A_R, nuclear sequence allelic richness.

Region	Pop	Location	Latitude	Longitude	cpDNA				nDNA
					n	Hd	π (x 10−4)	Haplotypes	N	AR	π (x 10−3)
eastern	DT001	Xunhua, Qinghai	35.84	102.6	5	0.00	0.0	H1(5)	5	2.91	3.41
	DT013	Gaolan, Gansu	36.20	104.03	16	0.00	0.0	H2(16)	16	4.01	4.43
	DT014	Baiyinxian, Gansu	36.53	104.07	10	0.78	39.1	H2(3), H3(1), H4(2), H5(4)	10	3.10	2.57
	DT015	Zhongweisha, Ningxia	37.44	104.92	14	0.58	72.6	H2(5), H6(8), H7(1)	13	3.73	4.26
	DT017	Sizikou, Ningxia	37.30	105.45	16	0.77	13.8	H2(6), H8(2), H9(4), H10(4)	15	3.44	3.60
	DT020	Wulate, Neimenggu	40.87	107.14	8	0.43	2.5	H11(6), H12(2)	10	2.85	2.45
	S1	Mt.Helan, Ningxia	38.74	106.02	9	0.50	4.8	H32(6), H33(3)	10	3.37	3.81
	W18	Mt.Xizhuozi, Ningxia	39.45	106.87	10	0.00	0.0	H31(10)	5	2.99	4.31
	Q18	Qingtongxia, Ningxia	37.89	105.99	7	0.00	0.0	H31(7)	14	2.76	3.87
	JT	Jingtai, Gansu	37.18	104.06	9	0.95	68.0	H4(1), H18(1), H19(3), H20(2), H21(1), H22(1)	14	3.14	3.38
	TR	Tongrenxian, Gansu	35.52	102.02	11	0.77	52.6	H35(4), H36(5), H37(2)	10	3.10	3.31
Total eastern region					115	0.89	73.7		122	23.93	5.85
western	JC	Jinchang, Gansu	38.50	102.16	13	0.69	47.3	H13(1), H14(3), H15(7), H16(1), H17(1)	13	2.00	1.65
	NRG	Nuorigong, Neimenggu	40.17	104.8	11	0.95	47.7	H23(2), H24(2), H25(1), H26(1), H27(2), H28(1), H29(1), H30 (1)	14	3.34	3.59
	SD	Shandanxian, Gansu	38.91	101.12	11	0.00	0.0	H34(11)	16	1.97	2.01
	YBL	Yabulai, Neimenggu	39.43	102.78	16	0.24	2.5	H38(14), H39(1), H40(1)	11	4.26	6.90
	ZY	Zhangye, Gansu	38.87	101.13	15	0.53	3.9	H34(10), H41(3), H42(2)	14	2.29	1.62
Total western region					66	0.85	53.1		68	17.57	6.28
Total All regions					181	0.94	72.2		190	17.00	7.11