title: Generation of heteroplastidic Nicotiana cybrids by protoplast fusion: analysis for plastid recombinant types.
abstract: Protoplasts of a mutant line of Nicotiana tabacum having a maternally-transmitted chlorophyll deficiency were fused with protoplasts of two alloplasmic-male-sterile Nicotiana lines by the "donor-recipient" technique. In both fusion experiments variegated plantlets were regenerated which were shown to contain cytoplasms of mixed chloroplast nature. This confirms that with the "donor-recipient" method one can obtain mixed cytoplasms of genetically different chloroplasts. We present a convenient system to assay for genetic recombination between chloroplasts by combining use of several cytoplasmic markers: vis. chlorophyll pigmentation, chloroplast DNA restriction patterns, tentoxin resistance and male sterility. Within the limits of the experiment no recombinant types were recovered.
authors.affiliation: Department of Plant Genetics, Weizmann Institute of Science, 76100, Rehovot, Israel.
authors.forename: R
authors.initials: R
authors.lastname: Fluhr
authors.forename: D
authors.initials: D
authors.lastname: Aviv
authors.forename: E
authors.initials: E
authors.lastname: Galun
authors.forename: M
authors.initials: M
authors.lastname: Edelman