Table 1.

The Arabidopsis ttg1 mutants identified so far.

Allele	Origin	Mutation	Phenotype	References
ttg1-1	EMS	Q317-stop codon	transparent testa, glabra	[3,6]
ttg1-9	EMS	S282F	transparent testa, glabra	[6,48]
ttg1-10	EMS	g-a (5′UTR)	transparent testa, glabra (−)	[46]
ttg1-11	EMS	G149R	transparent testa, glabra	[46]
ttg1-12	EMS	G43R	transparent testa, glabra	[46]
ttg1-13	fast neutrons	genome deletion	transparent testa, glabra	[46]
ttg1-15/16/17/18	EMS	S310-stop codon	transparent testa, glabra	[6]
ttg1-19	EMS	W183-stop codon	transparent testa, glabra	[6]
ttg1-20	EMS	S30C, S310-stop codon	transparent testa, glabra	[6]
ttg1-21	T-DNA	insert in 5′UTR	transparent testa, NA	[49,50]
ttg1-22	T-DNA	insert in intron	transparent testa, NA	[49,50]
ttg1-23	EMS	S197F	transparent testa (−), glabra	[51]
ttg1-24	EMS	L339F	transparent testa (−), glabra (−)	[51]
ttg1-23 (T)	T-DNA	fragment deletion	transparent testa, glabra	[52]
ttg1-24 (T)	T-DNA	genome deletion	transparent testa, glabra	[51]
ttg1-213	NA	W183-stop codon	transparent testa, glabra	[53]
urm23	EMS	G302E	glabra (− −)	[53]
ttg1 (Est)	EMS	S101F	transparent testa, glabra	[54]
ttg1-P313	T-DNA	Insertion (ND)	glabra	[55,56]
ttg1-P416	T-DNA	insert in intron	transparent testa, glabra	[55,56]
ttg1-SK31268	T-DNA	Insertion (ND)	transparent testa, glabra	[55,56]
ttg1-SK41546	T-DNA	insert in intron	transparent testa, glabra	[55,56]
ttg1-21-CI	CI	insert in 5′UTR	transparent testa, NA	[57]

Phenotypes from strong to weak: glabra > glabra (−) > glabra (− −); transparent testa > transparent testa (−). Est: Estland, EMS: Ethyl methanesulfonate, T-DNA: transfer-DNA, UTR: untranslated region, NA: no information available, urm: unarmed, CI: carbon ion irradiation, ND: position of insertion was not determined.