Table 2. Distribution of embryo phenotypes in single siliques of wild type and spp mutant heterozygotes.^a .

Genotype	Silique numberb	1-cell	2-cell	8-cell	16-cell	Aborted seedc	EG	LG	EH	Heart	Torpedo	Cotyledon	Total scored	Fraction delayed or abnormal
WT	2	-	-	9	22	-	5	-	-	-	-	-	36	-
	4	-	-	-	4	-	11	23	6	-	-	-	44	-
	6	-	-	-	-	-	4	33	10	-	-	-	47	-
	8	-	-	-	-	-	-	20	18	9	-	-	47	-
	10	-	-	-	-	-	-	-	17	33	-	-	50	-
	12	-	-	-	-	-	-	-	-	37	18	-	55	-
	14	-	-	-	-	-	-	-	-	1	19	33	53	-
	16	-	-	-	-	-	-	-	-	-	-	53	53	-
spp-1	2	2	15	22	5	-	-	-	-	-	-	-	44	-
	4	-	2	12	25	-	2	-	-	-	-	-	41	-
	6	1	3	7	17	-	17	-	-	-	-	-	45	-
	8	-	-	3	12	-	3	15	15	-	-	-	48	0.31
	10	-	2	2	8	-	-	5	4	21	-	-	42	0.29
	12	-	-	-	8	8	-	-	-	5	22	2	45	0.36
	14	-	-	-	6	6	-	-	-	-	3	26	41	0.29
spp-2	2	-	2	12	6	-	4	-	-	-	-	-	24	-
	4	-	-	12	11	-	7	1	1	-	-	-	32	-
	6	-	-	4	6	-	12	5	3	-	-	-	30	-
	8	-	-	8	2	-	2	10	13	-	-	-	35	-
	10	-	-	2	5	1	9	5	6	10	-	-	38	0.21
	12	-	-	2	8	2	-	-	-	15	21	-	48	0.25
	14	-	-	-	2	7	-	-	-	2	30	-	41	0.22
	16	-	-	-	1	9	-	-	-	-	6	26	42	0.24

^aEmbryo developmental stage names refer to the cell number or morphology of the embryo proper. Abbreviations are defined as follows: EG, early globular; LG, later globular; EH, early heart.

^bSiliques were numbered consecutively from the top of the inflorescence, such that the oldest siliques have the highest numbers.

^cAborted seed were shrivelled with no visible embryo or endosperm development.