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Genetic variation of Viola calaminaria, an endemic metallophyte
Bizoux, Jean-Philippe; Mahy, Grégory
2005In Proceedings of the GfÖ: Lanscapes, ecosystems and populations: dynamics, functions and conservation
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Keywords :
Viola calaminaria (DC) Lej; genetic differentiation; genetic diversity
Abstract :
[en] The zinc violet, Viola calaminaria (DC) Lej., is a rare threatened species in Belgium which is endemic to metalliferous sites. Yours aims were to assess the genetic structure of the species at the scale of its distribution range, including differentiation with related taxa Viola guesphalica and to examine the influence of population size and recent colonisation events on population genetic structure in order to identify conservation priorities. The analysis of genetic variation (Amova) showed a strong population differentiation (Fst = 0.26) with a regional group differentiation. The V. guestfalica population exhibits the larger differentiation (Fst = 0.19). The levels of population genetic diversity (Hs) varied from 0.21 to 0.29. Mean genetic differentiation among ancient populations (Fst =0.26) is higher than genetic differentiation among recent populations (Fst =0.18) while any difference appears on genetic diversity. This strong population differentiation suggests a low gene flow between populations but sufficient within population to maintain high level of diversity. For management, the result implies a hierarchical conservation strategy including small population. New populations had as much genetically importance than old populations. No foundation effects were detected in the recent populations. These populations probably result from multiple colonization effects from more than one source population. Finally, even if some V. calaminaria populations exhibit a similar level of genetic differentiation of V. guestfalica population, this one appeared as a particular genetic pool.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Bizoux, Jean-Philippe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Mahy, Grégory ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Language :
English
Title :
Genetic variation of Viola calaminaria, an endemic metallophyte
Publication date :
2005
Event name :
GFÖ 2005-Landscapes, ecosystems and populations - dynamics, functions and conservation.
Event organizer :
GfÖ: Gesellschaft fur Okologie
Event place :
Regensburg, Germany
Event date :
19-23 septembre 2005
Audience :
International
Main work title :
Proceedings of the GfÖ: Lanscapes, ecosystems and populations: dynamics, functions and conservation
Collection name :
35
Pages :
512
Peer reviewed :
Peer reviewed
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since 23 February 2010

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