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Lyn A. Gettys and Dennis J. Werner

Stokes aster is a herbaceous perennial native to the southeastern United States. Stokesia is a monotypic genus belonging to the tribe Vernonieae Cass. (family Asteraceae Dumont). The level of genetic diversity within the genus is unknown. The goal of this study was to determine the level of genetic diversity and relatedness among cultivars of stokes aster. The genetic relatedness among 10 cultivars of stokes aster, one accession of Vernonia crinita Raf. (syn. V. arkansana DC.), and one accession of Rudbeckia fulgida Ait. var. sullivantii (Beadle et Boynton) Cronq. `Goldsturm' was estimated using 74 randomly amplified polymorphic DNA (RAPD) primers. Similarity indices suggest that cultivars of stokes aster are very closely related, with values for all pairwise comparisons of cultivars of stokes aster ranging from 0.92 to 0.68. One cultivar, `Omega Skyrocket', had markedly lower similarity indices from the other cultivars, ranging from 0.72 to 0.68. Similarity indices between stokes aster and Vernonia and between stokes aster and Rudbeckia were 0.44 and 0.50, respectively.

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Lyn A. Gettys and Dennis J. Werner

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Jessica Gaus Barb, Dennis J. Werner, and Shyamalrau P. Tallury

Carolina) ( Bailey, 1949 ; Gunn and White, 1974 ). Stokesia is a member of the Vernonieae tribe (Asteraceae) that includes 121 genera and ≈1500 species with global distribution ( Robinson, 1999a , 1999b , 2007 ). There are 21 species of Vernonieae

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Jessica G. Barb, Dennis J. Werner, and Robert J. Griesbach

Phytochemistry 30 5 1677 1678 Harborne, J.B. Williams, C.A. 1977 Vernonieae: Chemical review 524 534 Heywood V.H. Harborne J.B. Turner B.L. The biology and chemistry of the Compositae

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Liuhui Yang, Jianjun Zhang, Jaime A. Teixeira da Silva, and Xiaonan Yu

should be combined to provide more useful information for a breeding program. Literature Cited Angulo, M.B. Massimiliano, D. 2009 Karyotype analysis in eight species of Vernonia (Vernonieae, Asteraceae) from South America Caryologia 62 81 88 Arano, H

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Hunter A. Hammock, Dean A. Kopsell, and Carl E. Sams

mattogrossensis Less (Asteraceae:Vernonieae) leaves Quim. Nova 35 2139 2145 doi: 10.1590/s0100-40422012001100007 Graamans, L. Baeza, E. van den Dobbelsteen, A. Tsafaras, I. Stanghellini, C. 2018 Plant factories versus greenhouses: Comparison of resource use