Figure 8.—

Lethality of hypoploid stt1/− embryos and endosperms. Confocal micrographs of embryo sacs and developing seeds from stt1/+ crossed as a female by TB-5S-2L males at 6 DAP (A–H) or 10 DAP (I and J). (A–E and I and J) stt1. (F–H) WT. Bars, 100 μm (A–J). (K) Fertilization rates (top) and frequency of kernels with each genetic constitution (bottom) resulting from stt1/+ crossed as a female by TB-5S-2L as a male 6 DAP. Rates of hypoploidy for *WT calculated from a cross of w3/+ females by the same TB-5S-2L males and **stt1 calculated from the frequency of novel stt1 phenotypes. (L) Embryo and endosperm length (±SEM) of stt1 individuals from stt1/+ by TB-5S-2L for each genetic constitution. *Significantly different from balanced stt1 individuals (*P < 0.05 or **P < 0.001).