Figure 1

Megasporocyte meiotic stages in Populus simonii × P. nigra var. italica (bar = 10 μm). (A) Megaspore mother cell; (B) Leptotene; (C) Pachytene; (D) Diakinesis; (E) Metaphase I; (F) Anaphase I; (G) Telophase I; (H) Prophase II; (I) Metaphase II; (J) Anaphase II; (K) Telophase II; (L) Linear tetrad.