Genetic Activity in a Heterochromatic Chromosome Segment of the Tomato

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Science  25 Sep 1964:
Vol. 145, Issue 3639, pp. 1432-1434
DOI: 10.1126/science.145.3639.1432


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.