Table II.

Tetraploid analysis of duo1 and duo2

Frequency of normal (wild type) and mutant (duo) pollen grains in putative tetraploid sectors induced in duo heterozygotes. The expected frequencies of normal and mutant pollen arising from duplex duo alleles in tetraploid plants are shown assuming no double reduction. *, X² values indicating no significant difference from a 1:5 ratio (X² < x_0.05[1]² = 3.84).

Mutant	Observed/Expected	Wild Type	duo	X2
duo1	Observed	78	19	-
	Duplex, duo1 recessive	81	16	0.678*
duo2	Observed	144	31	-
	Duplex, duo2 recessive	167	29	3.305*