Gypsophila paniculata, widely known as baby’s breath, is a flowering plant of the Caryophyllaceae family (Li et al., 2019). Because of its ornamental value as one of the most important cut flowers in global commercial floriculture, G. paniculata ranks as one of the top-ten best-selling cut flower species globally (Zvi et al., 2008). However, classical hybridization is seriously hampered by the sterility of G. paniculata (Wang et al., 2013). As a consequence, very few variations exist among commercial cultivars used as fresh and dried cut flowers for fillers in flower arrangements (Zvi et al., 2008). Therefore, there is massive demand in the floriculture market for new varieties with novel characteristics.
Considering the challenges associated with genetic engineering of specific ornamental traits, the proven technique of radiation mutagenesis is an ideal alternative. Effectively, it induces a variety of mutagenesis responsible for alteration traits. Indeed, numerous traits have been generated through the use of radiation mutagenesis techniques (e.g., X-rays and γ-rays), including flower type and color, all of which determine the quality and popularity of cut flowers (Lin et al., 2019; Singh, 2014; Singh and Bala, 2015; Vasko and Kyrychenko, 2016). Flower type is the key ornamental trait and the top interest in G. paniculata breeding. Several commercial varieties of G. paniculata have been released by breeders, such as ‘Million Stars’, ‘Bristol Fairy’, ‘Snowball’, and ‘Cloudstar 5’ (Li et al., 2019; Shibuya et al., 2017; Zvi et al., 2008). To develop new cultivars with a novel double-flower type, we conducted gamma radiation mutagenesis using a variety of ‘Cloudstar 4’, which has a semidouble flower. In 2018, a new G. paniculata cultivar was selected from the mutagenized population and was named ‘Huixing 1’. Compared with its progenitor (‘Cloudstar 4’), ‘Huixing 1’ has bigger flowers and more flower petals.
Li, F., Wang, G., Yu, R., Wu, M., Shan, Q., Wu, L., Ruan, J. & Yang, C. 2019 Effects of seasonal variation and gibberellic acid treatment on the growth and development of Gypsophila paniculata HortScience 54 1370 1374
Lin, B., Zhong, H.Q., Huang, M.L., Fan, R.H. & Luo, Y.H. 2019 The study of 60Co-γ ray irradiation effects on flower color of Iris hollandica J. Nuclear Agr. Sci. 33 633 639
Shibuya, T., Murakawa, Y., Nishidate, K., Nishiyama, M. & Kanayama, Y. 2017 Characterization of flowering-related genes and flowering response in relation to blue light in Gypsophila paniculata Hort. J. 86 94 104
Singh, B. 2014 Effect of gamma rays on vegetative and flowering parameters of Gerbera (Gerbera jamesonii Bolus Ex Hooker F.) HortFlora Res. Spectr. 3 267 270
Singh, M. & Bala, M. 2015 Induction of mutation in Chrysanthemum (Dendranthema grandiflorum Tzvelev.) cultivar Bindiya through gamma irradiation Indian J. Hort. 72 376 381
Vasko, V. & Kyrychenko, V. 2016 Variability of valuable economic traits in M1 and M2 sunflower generations influenced by dimethyl sulfate and γ-rays Žemės Ūkio Mokslai (Agr. Sci.) 23 168 177
Wang, S.M., Piao, X.C., Park, S.Y. & Lian, M.L. 2013 Improved micropropagation of Gypsophila paniculata with bioreactor and factors affecting ex vitro rooting in microponic system In Vitro Cell. Dev. Biol. Plant 49 70 78
Zvi, M.M.B., Zuker, A., Ovadis, M., Shklarman, E., Ben-Meir, H., Zenvirt, S. & Vainstein, A. 2008 Agrobacterium-mediated transformation of Gypsophila (Gypsophila paniculata L.) Mol. Breed. 22 543 553