Table 1.

Key regulators involved in the transition from SAM to IM in rice, maize, barley and wheat.

Rice	Maize	Barley	Wheat	Pathways	Reference
FON2/4	ZmCLE7; ZmCLE14			CLV-WUS	[28,30,34]
FCP1; FCP2	ZmFCP1			CLV-WUS	[31,34]
FON1	TD1			CLV-WUS	[26,27]
	FEA2			CLV-WUS	[33]
	FEA3			CLV-WUS	[34]
TAB1				CLV-WUS	[32]
OSH1	KN1		WKNOX1	KNOX	[42,44,47]
	BLH12; BLH14			KNOX	[43]
	CT2			G-protein	[35,59]
	ZmGB1			G-protein	[56]
GS3			TaDEP1	G-protein	[9,10,57]
	Maize Gα	Brh1		G-protein	[55,59]
Hd3a		HvFT1; HvTF2; HvFT4	VRN3; FT1; FT2	Photoperiod	[60,70,71,72,74,75,78]
Ehd1				Photoperiod	[62,63]
Hd1		HvCO1; HvCO2		Photoperiod	[8,80]
Ghd7	ZmCCT10	HvVRN2	TaVRN2	Photoperiod	[67,68,79,80]
OsFD1; OsFD4				Photoperiod	[61,95]
Ehd2	ID1			Photoperiod	[65,66]
		Ppd-H1	Ppd-1	Photoperiod	[73,74]
OsMADS1; OsMADS14; OsMADS15; OsMADS18		HvVRN1	FUL2; FUL3; TaVRN1	Others	[81,83,84,85]
	FEA4			Others	[87]
	MSCA1			Others	[88]
OsCKX2; LOG		HvCKXs	TaCKXs	Others	[90,91,93,94]

Abbreviations of gene names: FON, FLORAL ORGAN NUMBER; CLE, CLAVATA3/ESR-related; FCP, FON2-LIKE CLE PROTEIN; TD1, THICK TASSEL DWARF1; FEA, FASCIATED EAR; TAB1, TILLERS ABSENT1; OSH1, Oryza sativa HOMEOBOX 1; KN1, KNOTTED1; BLH, BELL1-like homeobox protein; CT2, COMPACT PLANT2; ZmGB1, Zea mays Gβ subnuit; GS3, Grain Size 3; DEP1, DENSE ERECT PANICLE1; Brh1, Brachytic1; Hd3a, Heading date 3a; FT, FLOWERING LOCUS T; VRN, VERNALIZATION; Ehd1, Early heading date 1; Hd1, Heading date 1; CO, CONSTANS; ZmCCT10, CO, CONSTANS, CO-LIKE and TIMING OF CAB1; Ghd7, Grain number, plant height, and heading date 7; FD, FLOWERING LOCUS D; ID1, INDETERMINATE 1; Ppd, Photoperiod-H1; FUL, FRUITFULL; MSCA1, MALE STERILE CONVERTED ANTHER1; CKX, Cytokinin Oxidase/dehydrogenase; LOG, LONELY GUY.