Identification of Chromosomes Involved in Six Radiation-induced Translocations in Collinsia heterophylla: A Search for the “Pseudo-supernumerary” Chromosome

Abstract

Chromosomes were identified in six radiation-induced translocations in Collinsia heterophylla in order to determine if all seven haploid chromosomes undergo breakage and reunion. Six of the seven chromosomes were involved in these translocations. The seventh chromosome not involved may be the “pseudo-supernumerary” chromosome. This work provides supporting evidence in favor of Garber's suggestion about the existence of such a chromosome in the genome of C. heterophylla.