title: Genetic Activity in a Heterochromatic Chromosome Segment of the Tomato.
abstract: The first example of genetic activity within a heterochromatic region of the tomato is provided by the delimitation of nv to the long arm of chromosome 9 by means of the induced deficiency method. A close spatial relationship between nv and ah was established by deficiencies for ah in the same arm and by linkage tests between the two genes.
authors.forename: G S
authors.initials: GS
authors.lastname: Khush
authors.forename: C M
authors.initials: CM
authors.lastname: Rick
authors.forename: R W
authors.initials: RW
authors.lastname: Robinson