Cytological Studies in the Genus Rosa

  title={Cytological Studies in the Genus Rosa},
  author={Pushpa Lata},
Male meiosis was studied in 6 diploid, 3 tetraploid and I pentaploid Rosa species. Chromosome associations at diakinesis and irregularities at anaphase and telophase were scored. Pollen fertility was also determined. The diploids and one tetraploid, R. s. pimpinellifolia showed regular meiosis and high pollen fertility. The tetraploid hybrid species, R. macrantha showed fairly irregular meiosis with only about one third of pollen fertile. Highly irregular meiosis, with 6-7 bivalents and… CONTINUE READING