Syncytes during male meiosis resulting in 2n pollen grains formation in Lindelofia longiflora var. falconeri Meiosis of Pollen Mother Cells in Autotetraploid Broccoli Observations on Aglaonema modestum Cytogenetic Behavior Meiosis of Pollen Mother Cells in Autotetraploid Petunia Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’ Meiotic Observations of Pollen Mother Cells in Diploid and Autotetraploid Ziziphus jujuba Mill.‘Lajiaozao’ Meiosis of Pollen Mother Cells in Autotetraploid Broccoli Meiotic Chromosome Behavior of Pollen Mother Cells and Gamete Fertility in Triploid Grape ‘Summer Black’