Figure 2

Meiotic restitution mechanisms in A. tequilana and A. angustifolia. a Dyad with two binucleated microspores in A. angustifolia var. “Lineño”. b Dyad with two 2n cells in A. angustifolia var. “Lineño”. c Triad in A. angustifolia var. “Lineño”, with two n cells (arrowheads) and one 2n cell. d Formation of one 2n restituted nucleus (arrowhead) and two n nuclei (arrows) due to a perpendicular division plane in one of the chromosomal complements in A. angustifolia var. “Lineño”. e Start of cytokinesis in telophase I (arrowhead), the following stage of the one showed in d. f Triad in A. angustifolia var. “Lineño”, with two n cells (arrowheads) and one 2n cell in the following stage of e. g-h Dyad and triad found in A. tequilana. i 2n pollen (arrow), n pollen (arrowheads) and sterile pollen (asterisk) in A. tequilana. Scale bars: a-h 20 μm; i 100 μm.