Submitted to: HortScience
Publication Type: Abstract Only
Publication Acceptance Date: 3/3/2006
Publication Date: 6/29/2006
Citation: Olsen, R.T., and Ranney, T.G. 2006. Polyploid breeding in Hypericum androsaemum L. HortScience. 41:952.
Technical Abstract: Ploidy manipulation is an important tool in plant breeding programs, and until recently, has been underutilized in woody ornamental plants due, in part to the difficulty of inducing and isolating stable polyploids in woody genera. The advent of flow cytometry, a rapid and efficient screen for identifying polyploids, has facilitated renewed interest in integrating ploidy manipulation into plant breeding programs. Recent research on developing non-invasive, triploid cultivars of Hypericum androsaemum, tutsan St. John’s wort, will illustrate steps necessary for integrating ploidy manipulation into a successful breeding program, including techniques for induction and isolation of stable polyploids, interploid crossabilities and triploid blocks, inheritance of ornamental traits across ploidy levels, and fertility of interploid crosses.