Embryogenic calli from mature seeds of rice (Oryza sativa L. ssp.
japonica cv. kitaake) were transformed with PSARK::IPT in the
UC Davis Plant Transformation Facility (http://www.ucdptf.ucdavis.
edu/). PCR and segregation analysis were used to identify
single insertion events (Table S2). Plants containing a single
insertion event were selfed to generate homozygous T3 seeds.