Figure 2.

Cytological Analysis of et2 Male Meiosis.

(A) Tetrad stage meiocytes in wild-type (wt) and et2 male sporogenesis (bar = 10 µm) and mature pollen of the wild type and et2 in the qrt1-1^−/− mutant background (bar = 20 µm).

(B) DAPI-stained chromosome spreading of wild-type and et2 male meiosis shows the presence of tetraploid meiocytes in different stages of et2 meiosis. Bar = 10 µm.

(C) Chromosome spreads of premeiotic cells in wild-type and et2 flower buds. The presence of polyploid cells with condensed chromosomes indicates endomitotic polyploidization. Bar = 10 µm.