Table 1.

Mutant classes

Mutant class	Progeny type(s) after bud decapitation*	Progeny type(s) after pollination	Locus	No. of mutants
Wild-type apomict	Unreduced maternal seedlings (2n+0)	Maternal seedlings (2n+0)	WT	NA
Loss of apomeiosis	Reduced polyhaploid seedlings (n+0)	Polyhaploids (n+0)	LOA	24
Loss of parthenogenesis	No seed forms	Unreduced hybrids (2n+n)	LOP	30
Combined class*	No seed forms	Reduced hybrids (n+n)	LOA + LOP	25
Loss of autonomous endospermy†	No seed forms	Maternal seedlings (2n+0)	Unidentified	0

Nomenclature in parentheses follows the convention of Harlan and de Wet (56) in which the nuclear state of the egg is represented on the left of the addition sign and the nuclear state of the sperm is on the right. WT, wild-type; NA, not applicable.

*Many of the mutants in the combined class were severely compromised and/or had very large deletions that could not be used for mapping.

^†Predicted mutant class that was not observed.