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Evolution of the Sweet Potato (Ipomoea batatas (L.) Lam.)

Naturevolume 191pages9394 (1961) | Download Citation



RECENT work on meiosis1,2 has given considerable support to the suggestion of King and Bamford3, based on mitotic investigations, that the sweet potato is an allopolyploid, 2n = 90, resulting from hybridization and natural doubling of the chromosome number in F1. The incidence of secondary associations of bivalent chromosomes at metaphase has been interpreted by Ting et al. 2 as indicating that the sweet potato, derived from somewhat related species, is a ‘relatively recent species’.

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  1. 1

    Ting, Y. C., Kehr, A. E., and Miller, J. C., Amer. Nat., 91, 858 (1957).

  2. 2

    Ting, Y. C., and Kehr, A. E., J. Hered., 44, 5 (1953).

  3. 3

    King, J. R., and Bamford, R., J. Hered., 28, 279 (1937).

  4. 4

    Sauer, C. O., in Handbook of South American Indians, 6, edit. by Steward, J. H. (Smithsonian Institution Bull. 143, Washington, 1950).

  5. 5

    Ames, O., Economic Annuals and Human Cultures (Bot. Museum, Harvard University, Mass., 1939).

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  1. Vegetable Station, Crop Research Division, Department of Scientific and Industrial Research, Otahuhu, New Zealand

    • D. E. YEN


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