Table 1. Functional genes encoded by the sweet potato cp genome (72 single-copy genes and 11 two-copy genes).

Groups	Functional System	Num	Gene names
Photosynthesis	Photosystem I	7	psaA [ b ], psaB, psaC, psaI, psaJ, ycf3 [ c ], ycf4
	Photosystem II	15	psbA, psbB, psbC, psbD, psbE, psbF, psbG, psbH, psbI, psbJ, psbK, psbL, psbM, psbN, psbT [ b ]
	Cytochromeb6/f complex	6	petA, petB, petD, petG, petL, petN
	ATP synthase	6	atpA, atpB, atpE, atpF [ b ], atpH, atpI
	Calvin clycle	1	rbcL
	C-type cytochrome synthesis	1	ccsA
Chloro-respiration	NADH oxidoreductase	11	ndhA [ b ], ndhB [ a , b ], ndhC, ndhD, ndhE, ndhF, ndhG, ndhH [ a ], ndhI, ndhJ, ndhK
Expression machinery	RNA polymerase	4	rpoA, rpoB, rpoC1 [ b ], rpoC2
	ribosomal large subunit	9	rpl14, rpl16, rpl2, rpl20, rpl22, rpl23, rpl32, rpl33, rpl36
	ribosomal small subunit	12	rps2, rps3, rps4, rps7 [ a ], rps8, rps11, rps12 [ a , b , d ], rps14, rps15 [ a ], rps16, rps18, rps19
	maturase K	1	matK
metabolic pathway	acetyl-CoA carboxylase carboxyltransferase	1	accD
	clp protease proteolytic subunit	1	clpP
	chloroplast envelope membrane protein	1	cemA
pseudogenes	unknown functions	7	ycf2 [ a ], ycf15 [ a ], ycf68 [ a ], lhbA, orf42 [ a ], orf56 [ a , b ], orf188 [ a ]

Superscript

^[a] means the gene in the IR region with two copies;

^[b] means the gene contains a single intron;

^[c] means the gene contains two introns;

^[d] means the gene divided into two independent transcription units.