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Co-existence of Positive and Negative Heterosis in a Single Plant Organ

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Abstract

IN the course of a comparative study of leaf-shape in certain F1 hybrids and their parents, the flowering currants Ribes sanguineum Pursh, R. odoratum Wendl. and their hybrid R. × gordonianum Lem. were investigated. Mean leaf-shapes were derived by methods published earlier1,2, polar co-ordinates being used for the Ribes leaves. The mean leaf outlines shown in the accompanying illustration are plotted on a uniform scale for convenience of comparison. The actual mean lengths from the origin O to the apex P are: R. sanguineum 4.3 cm., R. × gordonianum 3.9 cm., R. odoratum 2.8 cm.

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References

  1. Melville, R., Ann. Bot., N.S., 1, 673 (1937).

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  2. Melville, R., Proc. Linn. Soc. Lond., 162, 158 (1951).

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  3. Powers, L., Amer. Nat., 78, 277 (1944).

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Authors and Affiliations

  1. Royal Botanic Gardens, Kew

    RONALD MELVILLE

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  1. RONALD MELVILLE
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MELVILLE, R. Co-existence of Positive and Negative Heterosis in a Single Plant Organ. Nature 169, 1054–1055 (1952). https://doi.org/10.1038/1691054a0

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