title: Genetic variability and population structure of Disanthus cercidifolius subsp. longipes (Hamamelidaceae) based on AFLP analysis.
abstract: Disanthus cercidifolius subsp. longipes is an endangered species in China. Genetic diversity and structure analysis of this species was investigated using amplified fragments length polymorphism (AFLP) fingerprinting. Nei's gene diversity ranged from 0.1290 to 0.1394. The AMOVA indicated that 75.06% of variation was distributed within populations, while the between-group component 5.04% was smaller than the between populations-within-group component 19.90%. Significant genetic differentiation was detected between populations. Genetic and geographical distances were not correlated. PCA and genetic structure analysis showed that populations from East China were together with those of the Nanling Range. These patterns of genetic diversity and levels of genetic variation may be the result of D. c. subsp. longipes restricted to several isolated habitats and "excess flowers production, but little fruit set". It is necessary to protect all existing populations of D. c. subsp. longipes in order to preserve as much genetic variation as possible.
authors.affiliation: Guangdong Key Laboratory of Plant Resources and Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institutes, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Guangdong Key Laboratory of Plant Resources and Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institutes, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fan
authors.affiliation: Guangdong Key Laboratory of Plant Resources and Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institutes, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Rujiang
authors.initials: R
authors.lastname: Shen
authors.affiliation: Department of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
authors.affiliation: Guangdong Key Laboratory of Plant Resources and Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institutes, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Jin
authors.affiliation: College of Forestry, South China Agriculture University, Guangzhou, China.
authors.forename: Dafang
authors.initials: D
authors.lastname: Cui
authors.affiliation: Guangdong Key Laboratory of Plant Resources and Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institutes, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Liao
mesh_terms: D054458:Amplified Fragment Length Polymorphism Analysis / Q000379:methods*; D002681:China; D016000:Cluster Analysis; D017753:Ecosystem; D056727:Endangered Species; D051456:Gene Flow; D014644:Genetic Variation; D005828:Genetics, Population; D005843:Geography; D029201:Hamamelidaceae / Q000145:classification / Q000235:genetics*; D010802:Phylogeny; D025341:Principal Component Analysis