Amino acid transporter (AAT) gene family in foxtail millet (Setaria italica L.): widespread family expansion, functional differentiation, roles in quality formation and response to abiotic stresses

Table 2 The extensive variations in gene structure, protein structure and sequence of paralogous AAT genes produced by gene duplication in foxtail millet

Type of duplication	Subfamily	No. of duplicated gene groups	Gene and protein structure variation			Range of Ka/Ks values	Duplicated gene groups
Type of duplication	Subfamily	No. of duplicated gene groups	No. of TM variation	No. of gene structure variation	No. of conserved domain variation	Range of Ka/Ks values	Duplicated gene groups
Tandem duplication	AAP	4	3	3	2	0.12–0.62	TD1-TD4
	ATLb	3	3	1	2	0.27–0.47	TD5-TD7
	GAT	1	0	1	1	0.43	TD8
	LHT	2	2	2	0	0.10–0.39	TD9,TD10
	ACT	1	0	1	1	0.18–0.27	TD11
	CAT	1	1	1	0	0.97	TD12
	PHS	1	1	0	1	0.41–0.67	TD13
	Sum^a	13	10 (77%)	9 (69%)	7 (54%)	0.10–0.97 (0.28)
Segmental duplication	ATLa	2	0	0	2	0.10–0.12	SD1,SD2
	ATLb	3	2	2	2	0.12–0.40	SD3-SD5
	LHT	2	2	1	0	0.12–0.37	SD6,SD7
	ACT	1	0	1	0	0.10	SD8
	CAT	4	1	1	3	0.14–0.50	SD9-SD12
	Sum^a	12	5 (42%)	5 (42%)	7 (58%)	0.10–0.50 (0.21)

^aThe data in columns 4, 5 and 6 represents the total number and its proportion (in the brackets) of mutated duplicated gene groups, while that in column 7 represents the range and average (in the brackets) of Ka/Ks values

ISSN: 1471-2164