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Fig. 1. The glo1-1 kernel phenotype. (A) Ear segregating for glo1-1 mutant kernels (arrow). (B) Germinal faces of a mature wild-type (far left) and three glo1-1 kernels, showing a range of typical mutant phenotypes. (C) glo1-1 uncovered by TB-1La (white arrow). (D) Longitudinal section through a wild-type kernel (far left), kernel with hypoploid (glo1-1/ glo1-1/–) endosperm and hyperploid (glo1-1/+/+) embryo (arrow, middle left), kernel with hypoploid (+/+/–) endosperm and hyperploid (+/+/+) embryo (middle right), and kernel with hyperploid (glo1-1/ glo1-1/+ /+) endosperm and hypoploid (glo1-1/–) embryo (arrow, far right).