Pachytene Analyses and the Karyotype of Drimiopsis barteri

Abstract

The pachytene chromosomes of the microsporocytes were analysed in defining the karyotype of D. barteri because an analysis of the somatic complement has been previously found to be inadequate to give the correct karyotype of the species. The analyses of the pachytene chromosomes revealed structural and morphological hybridity among the chromosomes by which not only the karyotype was resolved but also the probable mode of origin of the complement was defined, as well as a new basic chromosome number, x=6 (instead of x=8), determined for the genus.