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Genetic variation and conservation assessment of Chinese populations of Magnolia cathcartii (Magnoliaceae), a rare evergreen tree from the South-Central China hotspot in the Eastern Himalayas

文献类型：期刊论文

作者Zhang, Xue-Mei1,2; Wen, Jun3; Dao, Zhi-Ling1; Motley, Timothy J.4,5; Long, Chun-Lin1,5
刊名JOURNAL OF PLANT RESEARCH
出版日期2010-05-01
卷号123期号:3页码:321-331
关键词Breeding System Conservation Fragmentation Magnolia Cathcartii Gene Flow Genetic Diversity
ISSN号0918-9440
DOI10.1007/s10265-009-0278-9
通讯作者long@mail.kib.ac.cn
文献子类Article
英文摘要Nine natural populations of the rare evergreen tree Magnolia cathcartii (Magnoliaceae) were sampled across its natural range, and amplified fragment length polymorphism (AFLP) markers were used to assess genetic variation within and among populations. Three ex situ populations were also surveyed to determine whether conservation plantings include the entire genetic diversity of the species. Genetic diversity within the natural populations was very low (0.122 for Nei's gene diversity), and the southeast populations had the highest diversity. The ex situ populations had a lower diversity than the mean diversity for all populations, and none of the ex situ populations reached the levels of diversity found in their source populations. Genetic differentiation was high among natural populations (G (st) = 0.247), and an isolation-by-distance pattern was detected. Habitat fragmentation, restricted gene flow, and geitonogamy are proposed to be the primary reasons for the low genetic diversity and high genetic differentiation. More protection is needed, especially for the southeast populations, which possess the highest numbers of unique alleles according to AFLP fragment analyses. The ex situ program was a good first step towards preserving this species, but the current ex situ populations preserve only a limited portion of its genetic diversity. Future ex situ efforts should focus on enhancing the plantings with individuals from southeastern Yunnan.
学科主题Plant Sciences
WOS关键词ALLOZYME VARIATION ; EXTINCTION DEBT ; NORTH-AMERICA ; DIVERSITY ; PLANTS ; FOREST ; DEFORESTATION ; CONSEQUENCES ; PHYLOGEOGRAPHY ; MANAGEMENT
WOS研究方向Plant Sciences
语种英语
WOS记录号WOS:000277025000009
资助机构This work was supported by the Ministry of Education of China through its 111 Project (B08044, CUN 985-3-3), the Ministry of Science and Technology of China (2005DKA21006), the USA National Science Foundation (DEB-0103795), and the Knowledge Innovation Program of the Chinese Academy of Sciences. The authors thank Dr. Hong-Guang Zha and Dr. Yong-Hong Zhang for helpful suggestions during the experiments, Dr. Hong-Tao Li and Dr. Ying-Xiong Qiu for assistance in data analysis, and Dr. Xue-Fei Yang for providing the base map for Fig. 1.
公开日期2011-12-06
源URL[http://ir.kib.ac.cn:8080/handle/151853/2309]  
专题昆明植物研究所_资源植物与生物技术所级重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Smithsonian Inst, Natl Museum Amer Hist, Dept Bot, Washington, DC 20013 USA
4.Old Dominion Univ, Dept Biol Sci, Norfolk, VA 23529 USA
5.Cent Univ Nationalities, Coll Life & Environm Sci, Beijing 100081, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Xue-Mei,Wen, Jun,Dao, Zhi-Ling,et al. Genetic variation and conservation assessment of Chinese populations of Magnolia cathcartii (Magnoliaceae), a rare evergreen tree from the South-Central China hotspot in the Eastern Himalayas[J]. JOURNAL OF PLANT RESEARCH,2010,123(3):321-331.
APA Zhang, Xue-Mei,Wen, Jun,Dao, Zhi-Ling,Motley, Timothy J.,&Long, Chun-Lin.(2010).Genetic variation and conservation assessment of Chinese populations of Magnolia cathcartii (Magnoliaceae), a rare evergreen tree from the South-Central China hotspot in the Eastern Himalayas.JOURNAL OF PLANT RESEARCH,123(3),321-331.
MLA Zhang, Xue-Mei,et al."Genetic variation and conservation assessment of Chinese populations of Magnolia cathcartii (Magnoliaceae), a rare evergreen tree from the South-Central China hotspot in the Eastern Himalayas".JOURNAL OF PLANT RESEARCH 123.3(2010):321-331.

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来源：昆明植物研究所

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