title: Meiotic analysis of haploid and doubled haploid forms of Nicotiana otophora and N. tabacum.
mesh_terms: D002875:Chromosomes; D046508:Culture Techniques; D006238:Haploidy; D006570:Heterochromatin; D008540:Meiosis; D008938:Mitosis; D010947:Plants, Toxic; D014026:Nicotiana / Q000166:cytology / Q000254:growth & development*
chemical_list: D006570:Heterochromatin