Low potential for climatic stress adaptation in a rainforest Drosophila species
Low potential for climatic stress adaptation in a rainforest Drosophila species
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DOI：
10.1126/science.1084296
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发表时间：
2003-07-04
期刊：
影响因子：
56.9
通讯作者：
Schiffer, M
中科院分区：
文献类型：
--
作者：
Hoffmann, AA;Hallas, RJ;Schiffer, M
敏感的雨林物种对气候变化作出反应的能力在很大程度上是未知的。我们发现，澳大利亚热带雨林果蝇birchii表现出clinal的变化，在干燥抗性，但最具抗性的人口缺乏能力，即使经过激烈的选择超过30代，以发展进一步的阻力。亲子比较表明，这种性状的遗传变异低，但形态的遗传变异水平高。D. Birchii在微卫星位点上也表现出丰富的遗传变异。抗性进化的低潜力突出了评估受威胁栖息地的目标生态特征和物种的进化潜力的重要性。
The ability of sensitive rainforest species to evolve in response to climate change is largely unknown. We show that the Australian tropical rainforest fly Drosophila birchii exhibits clinal variation in desiccation resistance, but the most resistant population lacks the ability to evolve further resistance even after intense selection for over 30 generations. Parent-offspring comparisons indicate low heritable variation for this trait but high levels of genetic variation for morphology. D. birchii also exhibits abundant genetic variation at microsatellite loci. The low potential for resistance evolution highlights the importance of assessing evolutionary potential in targeted ecological traits and species from threatened habitats.