Genome-wide identification and expression profile analysis of metal tolerance protein gene family in Eucalyptus grandis under metal stresses

Table 2 Estimated divergence between paralogous MTP gene pairs in Eucalyptus grandis

Gene 1	Gene 2	Duplicate Type	Ka	Ks	Ka/Ks	Selection
EgMTP1.5	EgMTP1.7	Segmental	1.2020	0.1652	0.0131	Purifying
EgMTP8.1	EgMTP8.2	Segmental	0.1394	2.0094	0.0694	Purifying
EgMTP1.5	EgMTP1.3	Tandem	0.0747	0.0349	0.0832	Purifying
EgMTP1.5	EgMTP1.1	Tandem	0.1620	1.9117	0.0847	Purifying
EgMTP1.5	EgMTP1.4	Tandem	0.0826	0.0245	0.0848	Purifying
EgMTP1.5	EgMTP1.2	Tandem	0.0749	0.0328	0.0162	Purifying
EgMTP1.5	EgMTP1.6	Tandem	0.0751	0.0286	0.1150	Purifying
EgMTP1.3	EgMTP1.1	Tandem	0.0994	0.0348	0.2089	Purifying
EgMTP1.3	EgMTP1.4	Tandem	0.0751	0.0349	0.2366	Purifying
EgMTP1.3	EgMTP1.2	Tandem	0.0749	0.0519	0.2865	Purifying
EgMTP1.3	EgMTP1.6	Tandem	0.0218	0.0491	0.0101	Purifying
EgMTP1.1	EgMTP1.4	Tandem	0.0218	0.0182	0.3440	Purifying
EgMTP1.1	EgMTP1.2	Tandem	0.0992	0.0391	0.4180	Purifying
EgMTP1.1	EgMTP1.6	Tandem	0.1082	0.0285	0.4906	Purifying
EgMTP1.4	EgMTP1.2	Tandem	0.0908	0.0245	0.5175	Purifying
EgMTP1.4	EgMTP1.6	Tandem	0.0834	0.0286	0.5178	Purifying
EgMTP1.2	EgMTP1.6	Tandem	0.0674	0.0	0.5616	Purifying

Ka (non-synonymous substitution rate); Ks (synonymous substitution rate); Ka / Ks = 1 (natural selection); Ka / Ks > 1 (positive selection); Ka / Ks < 1 (purifying selection)

ISSN: 1471-2229