期刊
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
卷 39, 期 4-6, 页码 526-535出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bse.2011.07.013
关键词
Gastrodia; Orchidaceae; Genetic diversity; Population structure; Gene flow; Allozyme
资金
- National Scientific Foundation of China [30370145]
Gastrodia elata Blume, a mycoheterotrophic orchid native to the Far East, is an endangered medicinal plant in China. Genetic variation among 19 natural populations of G. elata was examined in central China by using allozyme polymorphism (16 loci in six enzymatic systems). The species exhibited high level of genetic diversity (P = 56.3%, A = 2.2 and H-E = 0.221), which was mainly attributed to its perennial habit and mixed reproduction system (both sexual and asexual). Evident genetic differentiation in G. elata natural populations was suggested by F-ST = 0.241. AMOVA analysis showed 31.3% of the total molecular variation was attributed to inter-population differentiation. Obvious genetic structure and genetic depauperation of some populations indicate forest fragmentation and over-collection have affected genetic variation of G. elata. A conservation strategy, which is conserving populations with great genetic distinction or high level of genetic variation from four management units, is recommended. (C) 2011 Elsevier Ltd. All rights reserved.
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