Table 13.

Codon based Z-test of neutral evolution using 11 nucleotide sequences of Ycf2 gene of Dendrobium sp.

	1	2	3	4	5	6	7	8	9	10	11
1. KU136288 Dendrobium densiflorum Ycf2 partial Raiganj		−0.740	0.740	0.485	2.016	2.259	−0.036	1.002	1.743	1.743	1.002
2. JQ274049 Scadoxus cinnabarinus chloroplast Ycf2 gene	0.461		−1.044	−0.778	−0.706	−0.809	−1.069	−0.929	−0.868	−0.920	−0.929
3. KJ501999 Goodyera fumata chloroplast Ycf2 gene	0.461	0.299		−0.261	0.727	1.342	0.123	0.469	−0.046	0.478	0.711
4. KJ524105 Paphiopedilum niveum Ycf2 partial gene	0.629	0.438	0.795		0.474	1.121	−0.088	0.204	−0.346	0.212	0.459
5. AY916449 Phalaenopsis aphrodite plastid gene sequence	0.046	0.482	0.468	0.636		2.682	0.480	1.742	1.742	1.742	2.015
6. GQ324949 Oncidium chloroplast partial Ycf2 gene	0.026	0.420	0.182	0.265	0.008		0.694	2.015	2.478	2.478	2.258
7. KC876126 Cymbidium mannii chloroplast complete genome	0.972	0.287	0.902	0.930	0.632	0.489		−0.347	0.216	0.218	−0.055
8. KM390013 Corallorhiza bulbosa plastid complete genome	0.318	0.355	0.640	0.838	0.084	0.046	0.729		1.420	1.420	1.002
9. KJ501998 Cypripedium formosanum Ycf2 partial gene	0.084	0.387	0.963	0.730	0.084	0.015	0.829	0.158		1.420	1.742
10. KR260986 Elleanthus sodiroi chloroplast Ycf2 gene	0.084	0.359	0.633	0.832	0.084	0.015	0.828	0.158	0.158		1.742
11. KR673323 Dendrobium strongylanthum Cp Ycf2 partial	0.318	0.355	0.479	0.647	0.046	0.026	0.956	0.318	0.084	0.084