Abstract
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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References
Ting, Y. C., Kehr, A. E., and Miller, J. C., Amer. Nat., 91, 858 (1957).
Ting, Y. C., and Kehr, A. E., J. Hered., 44, 5 (1953).
King, J. R., and Bamford, R., J. Hered., 28, 279 (1937).
Sauer, C. O., in Handbook of South American Indians, 6, edit. by Steward, J. H. (Smithsonian Institution Bull. 143, Washington, 1950).
Ames, O., Economic Annuals and Human Cultures (Bot. Museum, Harvard University, Mass., 1939).
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YEN, D. Evolution of the Sweet Potato (Ipomoea batatas (L.) Lam.). Nature 191, 93–94 (1961). https://doi.org/10.1038/191093b0
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DOI: https://doi.org/10.1038/191093b0
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