Table 3. AP2 acts maternally to control seed mass.

Parent
Female	Male	Seed weight*	Seed no. per silique	Seed weight per silique, mg
Wild type	Wild type	2.3 ± 0.1A	58 ± 1.6	1.4 ± 0.02
	ap2-6	2.3 ± 0.1A	58 ± 2.7	1.4 ± 0.1
	ap2-7	2.2 ± 0.1A	58 ± 4.6	1.3 ± 0.1
Male sterile CS4002	Wild type	2.8 ± 0.1B	45 ± 6.9	1.3 ± 0.2
	ap2-7	2.8 ± 0.1B	46 ± 6.3	1.3 ± 0.2
ap2-6	Wild type	3.3 ± 0.1C	51 ± 7.0	1.7 ± 0.2
	ap2-6	3.3 ± 0.1C	60 ± 2.7	2.0 ± 0.1
ap2-7	Wild type	3.8 ± 0.2D	53 ± 5.4	2.0 ± 0.2
	ap2-7	3.8 ± 0.1D	51 ± 4.4	1.9 ± 0.2

Reciprocal crosses between wild-type plants and homozygous ap2 mutants were performed on secondary inflorescences. Plants were grown together in the same conditions. Three flowers at identical positions (11th to 13th flowers for wild type or male-sterile mutant, 10th to 15th flowers in ap2 mutants) were manually pollinated. Two to four inflorescences per plant and four to five plants were used for calculations. Similar results were obtained in an independent experiment that was performed in a different season of the year. Means ± SD are shown.

^*Weight is given as mg per 100 seeds. Seed weight values that differ at the 0.01 significance level are labeled with different letters