Relationships between African species of the genus Cucumis L. Estimated by the production,vigour and fertility of F1 hybrids |
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| Authors: | A P M den Nijs D L Visser |
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| Institution: | (1) Institute for Horticultural Plant Breeding (IVT), P.O.B. 16, 6700 AA Wageningen, the Netherlands |
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| Abstract: | Summary The production, vigour, and fertility of F1 hybrids between nine African species of the genus Cucumis L. were studied as a measure of the relationships between the species. Hybrid plants were obtained from 29 out of the 72 possible cross combinations. Two F1 hybrids died as seedlings, and 27 hybrids were raised to maturity. Pollen production and stainability varied greatly amongst these hybrids, as did fruit and seed set following self pollination and backcrossing with either parental species. The fruit shape of the hybrids was always intermediate between that of both parental species.Two species appeared to be closely related: C. prophetarum L. and C. anguria var. longipes
A. Meeuse. Most other species produced highly to moderately fertile F1 hybrids with at least one other species. C. metuliferus
Naud. produced only sterile hybrids with C. zeyheri
Sond. 2x. The results sustain the recent taxonomic classification of the genus (Jeffrey, 1980). |
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| Keywords: | Cucumis species cucumber interspecific hybridization fertility estimates taxonomic relationships |
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