Hybridization may facilitate in situ survival of endemic species through periods of climate change
Hybridization may facilitate in situ survival of endemic species through periods of climate change
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DOI：
10.1038/nclimate2027
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发表时间：
2013-12-01
影响因子：
30.7
通讯作者：
Lockhart, Peter J.
中科院分区：
文献类型：
--
作者：
Becker, Matthias;Gruenheit, Nicole;Lockhart, Peter J.
预测气候变化下的生存和灭绝情形，不仅需要了解物种现今的生态特征以及未来可用的栖息地，还需要了解物种应对环境变化的适应潜力。杂交是一种可能有助于此的机制。在此，我们报告了统计证据，表明通过杂交进行的遗传信息传递是厚叶芥属（Pachycladon）植物的一个特征，这些植物在新西兰南岛地理上分离的高山避难所中熬过了末次盛冰期。我们发现，转移的硫代葡萄糖苷水解基因也显示出位点内重组的迹象。这种基因交换和重组有可能改变杂交物种后代的化学防御。我们利用一个数学模型表明，当杂交提高物种的适应潜力时，保护密切相关且能杂交的物种，而非保护基因上孤立的远缘物种，将最有利于保护未来的生物多样性。
Predicting survival and extinction scenarios for climate change requires an understanding of the present day ecological characteristics of species and future available habitats, but also the adaptive potential of species to cope with environmental change. Hybridization is one mechanism that could facilitate this. Here we report statistical evidence that the transfer of genetic information through hybridization is a feature of species from the plant genus Pachycladon that survived the Last Glacial Maximum in geographically separated alpine refugia in New Zealand's South Island. We show that transferred glucosinolate hydrolysis genes also exhibit evidence of intra-locus recombination. Such gene exchange and recombination has the potential to alter the chemical defence in the offspring of hybridizing species. We use a mathematical model to show that when hybridization increases the adaptive potential of species, future biodiversity will be best protected by preserving closely related species that hybridize rather than by conserving distantly related species that are genetically isolated.