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Effects of aminoethoxyvinylglycine (AVG), environment, and genotype in overcoming hybridization barriers between Cucumis species

  • Interspecific Crosses
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Summary

It was attempted to overcome crossing barriers between the cucumber (Cucumis sativus L.), the melon (C. melo L.) and two wild Cucumis spp. (C. metuliferus Naud. and C. zeyheri 2x Sond.) by application of aminoethoxyvinylglycine (AVG) and by limiting the amount of rooting substrate. The reciprocal crosses between both wild species were used as a model system.

Crosses between C. metuliferus and C. zeyheri 2x succeeded well if the maternal plants were grown in containers of 10 or 25 1 instead of in open soil. This treatment also improved crossability in the cross C. metuliferus x C. melo. It strongly enhanced the number of female flowers per plant in C. metuliferus. Application of AVG to pollinated flowers initially seemed also to improve crossability in these cross combinations, but later on this effect was not found again.

Significant genetic variation for crossability was found in C. zeyheri 2x. Rare plants yielded numerous fruits with embryos after crosses with C. metuliferus and also with C. sativus. Clones from these plants gave similar results.

Excessive temperature and radiation decreased crossability especially in crosses with C. metuliferus and C. sativus as maternal parent.

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Author notes

  1. A. P. M. Den Nijs

    Present address: Foundation for Agricultural Plant Breeding (SVP), P.O. Box 117, 6700 AC, Wageningen, the Netherlands

Authors and Affiliations

  1. Institute for Horticultural Plant Breeding (IVT), P.O. Box 16, 6700 AA, Wageningen, The Netherlands

    J. B. M. Custers & A. P. M. Den Nijs

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  1. J. B. M. Custers
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  2. A. P. M. Den Nijs
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Custers, J.B.M., Den Nijs, A.P.M. Effects of aminoethoxyvinylglycine (AVG), environment, and genotype in overcoming hybridization barriers between Cucumis species. Euphytica 35, 639–647 (1986). https://doi.org/10.1007/BF00021874

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  • DOI: https://doi.org/10.1007/BF00021874

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