Summary
Cytological investigations of 50 wild Cucumis introductions revealed the presence of three tetraploid species with 2n=48 chromosomes, and one hexaploid species with 2n=72 chromosomes, while all other species are diploid containing 2ns=14 or 2n=24 chromosomes. Two of the tetraploid species, C. heptadactylus (P.I. 282446), and a species related to C. zeyheri (P.I. 273192, 299570, 299571, and 299572) are natives of South Africa, while C. aculeatus (P.I. 193967, 196844, 273648, 273649, and 273650) is found in Ethiopia. The hexaploid, C. figarei (P.I. 343699, 343700, 343701), is a native of Nigeria. All polyploids are perennial, have efficient vegetative reproduction systems, and may have originated from the spontaneous formation of polysomatic cells.
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References
Brown, G. B., J. R. Deakin & M. B. Wood, 1969. Identification of Cucumis species by paper chromatography of flavonoids. J. Am. Soc. hort. Sci. 94: 231–234.
Candolle, A. de, 1882. Origin of cultivated plants. Hafner Publishing Company, New York and London. 468 pp.
Cogniaux, A. & S. Harms, 1924. Cucurbitaceae. Cucurbitae-Cucumerinae. In: Engler, Das Pflanzenreich 88 (IV, 275, II): 1–246.
Deakin, J. R., G. W. Bohn & T. W. Whitaker, 1971. Interspecific hybridization in Cucumis. Econ. Bot. 25: 195–211.
Ervin, C. D., 1941. A study of polysomaty in Cucumis melo. Am. J. Bot. 28: 113–124.
Jeffrey, C., 1967. Flora of tropical East Africa. Cucurbitaceae. Crown agents for oversea governments and administrations. London. 157 pp.
Kozuchov, Z. A., 1930. Karyological investigations of the genus Cucumis. Bull. appl. Bot. Gen. and Pl. Breed. 23: 357–365.
Leppik, E. E., 1966. Searching gene centers of the genus Cucumis through host-parasite relationship. Euphytica 15: 323–328.
Meeuse, A. D. J., 1958. The possible origin of Cucumis anguria L. Blumea Suppl. IV: 196–204.
Meeuse, A. D. J., 1962. The Cucurbitaceae of Southern Africa. Bothalia 8: 59–82.
Shifriss, O. 1942. Polyploids in the genus Cucumis. J. Hered. 33: 144–152.
Shifriss, O. 1950. Spontaneous mutations in the American varieties of Cucumis sativus L. Proc. Am. Soc. hort. Sci. 55: 351–357.
Shimotsuma, M. 1965. Chromosome studies of some Cucumis species. Seiken Zihô 17: 11–16.
Stebbins, G. L., 1971. Chromosomal evolution in higher plants. Addison-Wesley Publishing Company. 216 pp.
Tsuchiya, T., 1971. An improved aceto-carmine squash method, with special reference to the modified Rattenburg's method of making a preparation permanent. Barley Genetics Newsl. 1: 71–73.
Whitaker, T. W. & G. N. Davis, 1962. The Cucurbits. Botany, cultivation, and utilization. Interscience Publishing Inc., New York. 249 pp.
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Supported by the Colorado State University Experiment Station and published as Scientific Series Paper No. 2089.
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Dane, F., Tsuchiya, T. Chromosome studies in the genus Cucumis . Euphytica 25, 367–374 (1976). https://doi.org/10.1007/BF00041569
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DOI: https://doi.org/10.1007/BF00041569