Genetic diversity of Rhododendron delavayi var. delavayi (C. B. Clarke) Ridley inferred from nuclear and chloroplast DNA: implications for the conservation of fragmented populations
Sharma, Anup1,2,3; Poudel, Ram Chandra3,4; Li, Airong1,2; Xu, Jianchu1,2,3; Guan, Kaiyun1,2,5; Guan,KY (reprint author),Chinese Acad Sci,Xinjiang Inst Ecol & Geog,Xinjiang 830011,Peoples R China.; guanky@mail.kib.ac.cn
2014-10-01
发表期刊PLANT SYSTEMATICS AND EVOLUTION
ISSN0378-2697
卷号300期号:8页码:1853-1866
产权排序第二
摘要Rhododendron delavayi Franch. is an ecologically and horticulturally important tree species distributed in a global biodiversity hotspot in southwest China, an area with high level of human-induced habitat degradation and fragmentation. In an attempt to explore the level of genetic diversity and population differentiation in the remnant populations of R. delavayi var. delavayi (C. B. Clarke) Ridley, we assessed patterns of chloroplast (trnS-trnG and trnL-trnF) and nuclear (RPB2-i) DNA variation in 327 individuals representing 17 natural populations from southwest China. Analyses revealed two phylogeographic groups, with similar circumscription between the two markers. We found moderate levels of genetic differentiation (cpDNA: N (ST) = 0.125; G (ST) = 0.114 and nuclear DNA: N (ST) = 0.261; G (ST) = 0.152). Both genomes demonstrate significant correlation between genetic and geographic distances (cpDNA: r (2) = 0.248, p = 0.001 and nuclear DNA: r (2) = 0.250, p = 0.001). The genetic diversity was positively associated with an increase in longitude. Populations from the eastern region of the Yungui plateau, representing potential refugial area for R. delavayi var. delavayi, registered higher haplotype diversity and allelic richness. The mismatch distribution analysis rejected rapid population expansion. The overall population expansion time for R. delavayi var. delavayi was estimated to be 0.208-0.624 mya. The complex landscape of southwest China and the human-induced fragmentation of the natural habitat have led to significant pairwise population differentiation and moderate genetic diversity (cpDNA: 0.626 and nuclear DNA: 0.506) and haplotypic richness (cpDNA: 4.01 and nuclear DNA: 2.589) in R. delavayi var. delavayi. Based on these findings, we recommend strategies for the conservation and sustainable management of R. delavayi var. delavayi.
关键词Rhododendron Delavayi Var. Delavayi Genetic Diversity Habitat Fragmentation Yungui Plateau Chloroplast And Nuclear Dna Conservation
资助信息Main direction program of knowledge innovation of Chinese Academy of Sciences [KSCX2- YW-Z1019]; Key laboratory of biodiversity and biogeography, Kunming institute of botany, Chinese academy of sciences
学科领域Plant Sciences ; Evolutionary Biology
DOI10.1007/s00606-014-1012-1
收录类别SCI
语种英语
WOS研究方向Plant Sciences ; Evolutionary Biology
WOS类目Plant Sciences ; Evolutionary Biology
WOS记录号WOS:000341925200010
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/18415
专题资源植物与生物技术所级重点实验室
通讯作者Guan,KY (reprint author),Chinese Acad Sci,Xinjiang Inst Ecol & Geog,Xinjiang 830011,Peoples R China.; guanky@mail.kib.ac.cn
作者单位1.Univ Chinese Acad Sci, Kunming Coll Life Sci, Kunming 650201, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650204, Peoples R China
3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650204, Peoples R China
4.Chinese Acad Sci, Kunming Inst Bot, Plant Germplasm & Genom Ctr, Germplasm Bank Wild Species, Kunming 830011, Peoples R China
5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang 830011, Peoples R China
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Sharma, Anup,Poudel, Ram Chandra,Li, Airong,et al. Genetic diversity of Rhododendron delavayi var. delavayi (C. B. Clarke) Ridley inferred from nuclear and chloroplast DNA: implications for the conservation of fragmented populations[J]. PLANT SYSTEMATICS AND EVOLUTION,2014,300(8):1853-1866.
APA Sharma, Anup.,Poudel, Ram Chandra.,Li, Airong.,Xu, Jianchu.,Guan, Kaiyun.,...&guanky@mail.kib.ac.cn.(2014).Genetic diversity of Rhododendron delavayi var. delavayi (C. B. Clarke) Ridley inferred from nuclear and chloroplast DNA: implications for the conservation of fragmented populations.PLANT SYSTEMATICS AND EVOLUTION,300(8),1853-1866.
MLA Sharma, Anup,et al."Genetic diversity of Rhododendron delavayi var. delavayi (C. B. Clarke) Ridley inferred from nuclear and chloroplast DNA: implications for the conservation of fragmented populations".PLANT SYSTEMATICS AND EVOLUTION 300.8(2014):1853-1866.
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