title: High ISSR variation in 14 surviving individuals of Euryodendron excelsum (Ternstroemiaceae) endemic to China.
abstract: Euryodendron excelsum is a critically endangered Ternstroemiaceae species endemic to southern China, with only 14 individuals surviving in Ba Jia Zhen of Yangchun, Guangdong Province. Intersimple sequence repeat (ISSR) markers were used to assess genetic variation and relationships among these individuals. Population genetic parameters were estimated by a Bayesian approach as well as conventional methods. Of the 225 loci generated by 21 primers, 147 (65.33%) were polymorphic. Compared with other species of Theaceae and related families, a high level of genetic variation was identified in E. excelsum (Nei's gene diversity, 0.2458; Shannon's index, 0.3626). An unweighted pair group method with arithmetic mean (UPGMA) dendrogram showed that the 14 individuals were mainly clustered into three groups, a conclusion further supported by principal coordinate analysis. Based on these results, a management and conservation strategy for E. excelsum was proposed.
authors.affiliation: State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, P.R. China.
authors.forename: Yingjuan
authors.initials: Y
authors.lastname: Su
authors.forename: Ting
authors.initials: T
authors.lastname: Wang
authors.forename: Yufei
authors.initials: Y
authors.lastname: Sun
authors.forename: Huagu
authors.initials: H
authors.lastname: Ye
mesh_terms: D001499:Bayes Theorem; D002681:China; D003247:Conservation of Natural Resources; D018744:DNA, Plant / Q000235:genetics; D005819:Genetic Markers; D014644:Genetic Variation; D017422:Sequence Analysis, DNA; D028242:Theaceae / Q000235:genetics*
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers