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Fig. 2. (a). Caryopsis development of tetraploid by octaploid switchgrass cross 2 d after pollination. (b). Caryopsis development 2 d after pollination. From left to right; non-pollinated ovary, selfed octaploid, octaploid by tetraploid cross, and octaploid by octaploid cross (control). (c). Unfertilized ovary from tetraploid parent (left); caryopsis development of tetraploid by octaploid cross 6 d after pollination (right). (d). Caryopsis development of octaploid by octaploid cross (left) and octaploid by tetraploid cross (right) 6 d after pollination. (e). Unfertilized ovary from tetraploid parent (left); seed development of tetraploid by octaploid cross 10 d after pollination (right). (f). Caryopsis development of octaploid by octaploid cross (left) and octaploid by tetraploid cross (right) 10 d after pollination. Magnification is 26x.
