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United States Department of Agriculture

Agricultural Research Service

Research Project: Developing Non-Invasive Nursery Crops

Location: Floral and Nursery Plants Research Unit

2013 Annual Report


1a.Objectives (from AD-416):
The primary objective of this work is to characterize and develop ornamental plant germplasm using molecular markers, ploidy manipulation, and in-vitro technologies.


1b.Approach (from AD-416):
Select taxa of woody ornamental plants, including Cercis, Lagerstroemia, and Prunus, that have already been established in tissue culture, will be used to investigate ploidy manipulations that can be used to overcome crossing barriers and to develop seedless cultivars. In addition, unusual traits such as mutations or “sports”, will be investigated using molecular tools, and molecular markers will be used to characterize germplasm or hybrids.


3.Progress Report:

The objective of this project is to characterize and develop ornamental plant germplasm using molecular markers, ploidy manipulation, and in-vitro technologies. Accessions of ornamental Prunus (flowering cherry) interspecific hybrids were analyzed and confirmed using molecular markers (SSRs). Accessions of Prunus, crapemyrtle, and several other genera were established in-vitro and exposed to oryzalin to double chromosomes. Studies continued on elucidating the cause of mutants or “sports” in several genotypes of dwarf crapemyrtle, including the analysis of sequence data to search for similarities in other genera.


Last Modified: 9/10/2014
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