Economic Botany Section
Webb, Kaylie , Pratt, Donald B. .
Hybrid status of the Nanjing Beauty cultivar of Taxodium distichum (L.) Rich var. distichum x var. mexicanum Gordon.
Nanjing Beauty is a cultivar originating from crosses between T. distichum distichum and T. distichum mexicanum performed in China. The resulting progeny combine the growth form and habit of var. distichum with the evergreen nature and rapid growth of var. mexicanum. We assessed the status of the hybrids using PCR generated ISSRs on 21 T. distichum var. distichum (bald cypress), 4 T. distichum var. Mexicanum (Montezuma cypress), 5 T. distichum var. imbricarium (Nutt.) Croom (pond cypress), and Nanjing beauty and three other individuals stemming from the same cross. PCA results reveal the discrete segregation of var. distichum along PCA 1 and a second heterogenous group along PCA 1 containing vars. imbricarium, mexicanum, and the hybrids. Neither the PCA results nor genetic distance values support the reputed hybridity of Nanjing Beauty. Nanjing Beauty appears rather to be either, 1) a superior (non-hybrid) selection of T. distichum var. mexicanum; or, 2) a hybrid between T. distichum var. mexicanum and var. imbricarium.
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1 - Stephen F. Austin State University, Biology, Box 13003-SFA Station, Nacogdoches, TX, 75962-3003, USA
2 - Stephen F. Austin State University, Department of Biology, 13003 Sfa Station, Nacogdoches, Texas, 75962-3003, USA
Presentation Type: Poster:Posters for Sections
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM