Abstract
Approximately 500 species are involved in the genus Primula (Primulaceae). Most of these species are found in cool regions, high-altitude mountain area, or high-latitude area, in northern hemisphere. Interspecific hybridizations were performed among several species of the genus Primula to extend variations, to combine unique traits of both parents, and to introduce useful traits of one species into the other species. However, the abortion of hybrid embryos was one of the serious barriers for interspecific hybridizations. By using the appropriate medium developed in our study, interspecific hybrids were successfully produced in several interspecific cross combinations. Although all of the diploid hybrids obtained in these crosses showed hybrid sterility, female fertility was found to some extent in triploid hybrids. These triploids resulted in some interspecific cross combinations from the fertilizations between spontaneous unreduced gametes and haploid ones. Some of the hybrids or BC1s expressed attractive or unique characters and might be used as novel cultivars directly or as useful pre-breeding material for further breeding.
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Kato, J., Inari-Ikeda, M., Hayashi, M., Amano, J., Ohashi, H., Mii, M. (2018). Primula . In: Van Huylenbroeck, J. (eds) Ornamental Crops. Handbook of Plant Breeding, vol 11. Springer, Cham. https://doi.org/10.1007/978-3-319-90698-0_24
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DOI: https://doi.org/10.1007/978-3-319-90698-0_24
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