Table 2.

Ka/Ks analysis and estimation of the absolute dates of the duplication events for the duplicated GST gene pairs from apple

Duplicate pair (Gene ID)	Duplicate pair (Gene name)	Duplicate type	Ka	Ks	Ka/Ks	Purifying selection	Duplicate dates (million years)
MD02G1236000–MD02G1236100	MdGSTU15–MdGSTU16	Tendem	0.021	0.006	3.390	No	0.203
MD04G1139400–MD04G1139500	MdGSTU13–MdGSTU8	Tendem	0.054	0.153	0.353	Yes	5.114
MD04G1139500–MD04G1139600	MdGSTU8–MdGSTU14	Tendem	0.080	0.150	0.532	Yes	4.998
MD05G1184200–MD05G1184300	MdGSTU7–MdGSTU5	Tendem	0.310	1.475	0.210	Yes	49.154
MD05G1184200–MD10G1172100	MdGSTU7–MdGSTU6	Segmental	0.087	0.125	0.696	Yes	4.170
MD05G1184300–MD05G1184400	MdGSTU5–MdGSTU3	Tendem	0.250	1.408	0.177	Yes	46.918
MD05G1210000–MD05G1210100	MdGSTU33–MdGSTU30	Tendem	0.040	0.090	0.450	Yes	2.984
MD05G1210000–MD10G1196300	MdGSTU33–MdGSTU24	Segmental	0.047	0.204	0.232	Yes	6.797
MD05G1210100–MD05G1210200	MdGSTU30–MdGSTU31	Tendem	0.038	0.047	0.808	Yes	1.575
MD05G1210600–MD05G1210700	MdGSTU29–MdGSTU25	Tendem	0.031	0.104	0.296	Yes	3.474
MD08G1244100–MD15G1438400	MdDHAR2–MdDHAR1	Segmental	0.052	0.206	0.253	Yes	6.866
MD09G1147400–MD17G1133800	MdGSTF4–MdGSTF1	Segmental	0.151	0.300	0.503	Yes	9.997
MD09G1279700–MD17G1286500	MdGSTU27–MdGSTU23	Segmental	0.084	0.185	0.453	Yes	6.158
MD10G1172200–MD10G1172300	MdGSTU2–MdGSTU4	Tendem	0.102	0.331	0.309	Yes	11.023
MD13G1081900–MD13G1082000	MdGSTU17–MdGSTU18	Tendem	0.136	0.708	0.192	Yes	23.612
MD13G1081900–MD16G1081100	MdGSTU17–MdGSTU11	Segmental	0.118	0.810	0.146	Yes	27.006
MD17G1134200–MD17G1134300	MdGSTF5–MdGSTF14	Tendem	0.107	0.208	0.514	Yes	6.922