Consequences of in-situ strategies for the conservation of plant genetic diversity
Consequences of in-situ strategies for the conservation of plant genetic diversity
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DOI：
10.1016/j.biocon.2016.08.006
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发表时间：
2016-11-01
影响因子：
5.9
通讯作者：
Burke, T.
中科院分区：
文献类型：
--
作者：
Whitlock, R.;Hipperson, H.;Burke, T.
保护生物学家制定了一系列保护遗传多样性的准则，以最大限度地提高受威胁物种种群持续存在的机会，并保护这种变异以发挥其潜在效用。然而，我们对维持原地遗传多样性的保护指南的有效性的理解是有限的。此外，我们缺乏关于交配系统的物种水平变异如何影响这些遗传保护策略的信息。我们使用英国地理范围内八种分布广泛但数量正在下降的植物物种（其育种系统各不相同）作为模型来评估中性遗传多样性就地保护指南的有效性。通过将模拟的原位保护场景应用于放大的片段长度多态性数据，我们表明，一个种群的保护（“最小集”方法）将保留大约 70% 的常见等位基因变异，但很少或没有稀有等位基因（需要频率为种群 35% 的等位基因才能达到生物多样性公约关于原位保护 70% 遗传多样性的建议，如应用于稀有等位基因（类似于模拟保护网络中的遗传变异捕获对育种系统不敏感。然而，相对于空间随机策略，空间分层的种群选择方法导致了显着更高的捕获率，我们的研究强调了遗传多样性对物种范围缩小的脆弱性。有限公司
Conservation biologists have drawn up a range of guidelines for the conservation of genetic diversity to maximise the chances that populations of threatened species persist, and to conserve this variation for its potential utility. However, our understanding of the effectiveness of conservation guidelines for maintaining genetic diversity in situ is limited. Furthermore, we lack information on how species-level variation in mating system affects these genetic conservation strategies. We used the British geographical ranges of eight widespread but declining plant species, varying in breeding system, as a model to assess the effectiveness of guidelines for the in-situ conservation of neutral genetic diversity. By applying simulated in-situ conservation scenarios to amplified fragment length polymorphism data, we show that the conservation of one population (the "minimum-set" approach) would retain similar to 70% of common allelic variation, but few or no rare alleles (alleles with frequency 35% of populations would be needed to reach the Convention on Biological Diversity's recommendation to conserve 70% of genetic diversity in situ, as applied to rare alleles (similar to 10 populations within each species' British range). The capture of genetic variation in simulated conservation networks was insensitive to breeding system. However, a spatially stratified approach to population selection led to significantly greater capture rates for common alleles in two of our study species, relative to a spatially random strategy. Our study highlights the challenges of conserving genetic variation, and emphasises the vulnerability of genetic biodiversity to reductions in the extent of species' ranges. (C) 2016 The Authors. Published by Elsevier Ltd.