Table II.

Grouping of maize genotypes according to their zein pattern and capacity to transactivate zH genes with canonical (O2ts-zH) or non-canonical (o2ts-zH) O2 target sequence

Zein Gene Type	Group I, O2VFs		Group II, o2vfs
	Oh43, R802, B37a, 3316, B14, NYR		W22, Mo17, A69Yb, W64Ac, Rossman
	Allele O2	Allele o2R or o2It	Allele O2	Allele o2R, o2T, or o2It
O2ts-zH	+, Hs	(+, Hs)	+, Hs	((+, Hs))
o2ts-zH	+, Hs	+, Hs	+, Hs	−

Grouping is based on presence/activity or absence/inactivity of regulatory gene(s) coding for O2 vicarious factor(s), respectively, O2VF or o2vf. Data are derived from the results reported in Figures 1, 5, and 6 of present work and from unpublished data (M. Lauria and A. Viotti). + and Hs, Normal zH transcription and heavy zein polypeptide accumulation, respectively; however, only partially or severely attenuated when occurring in single or double parentheses, respectively. −, Absence or severe reduction in transcription.

^a This GB with the o2It allele shows a zein pattern identical to the B37o2R line (data not shown). 

^b This GB with an o2T allele shows a zein pattern identical to the A69Yo2It line (data not shown). 

^c This GB with the o2It allele shows a zein pattern identical to the W64Ao2T line (data not shown).