Progress in Genetic Sterilization of Lantana camara through Ploidy Manipulation

摘要

Lantana camara L. (Verbenaceae) is an important nursery and landscape plant in Florida and many other states in the southern United States. Plants of this species produce bright flowers, have short production cycles, require low maintonance in the landscape, attract butterflies, and can tolerate harsh environments. However, this species has been listed as a Category I Invasive Species by the Florida Exotic Pest Plant Council and has teen considered invasive in Florida by the University of Florida, Institute of Food and Agricultural Sciences (UF/IFAS) Invasive Plants Working Group. Sterile, noninvasive L. camara cultivars are much needed to protect the native lantana, L.depressa. Ploidy manipulation, particularly triploid production and selection, has teen used to sterilize L. camara. Two commercial triploid cultivars (Bandana~(TM) Landscape Yellow and Bandito~(TM) Orange Sunrise) and one petapioid cultivar (Luscious Marmalade) have been found to be highly male and female sterile and have no or lowpotential to hybridize with L. denressa The UF/IFAS ornamental plant breeding program at the Gulf Coast Research and Education Center has released four sterile, noninvasive L. camara cultivars, ‘UF-T3’, ‘UF-T4’, ‘UF-1011-2’, and rent time, ‘UF-1011-2’ and ‘UF-1-13A-2A’are commercially available under the name Bloomify Rose and Bloomity Red, respectively. Main challenges in developing sterile, noninvasive lantana cultivars teve been that irony cultivarscanform unreduced female gametes (UFGs)andapomictic seeds, which can lead to significant seed production even in triploid lantana. To effectively sterilize L. camara, it is essential to avoid using any lantana that can produce UFGs and apomictic seeds as breeding parents.