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Parallel evolution of domesticated Caenorhabditis species targets pheromone receptor genes

机译：驯化的秀丽隐杆线虫物种的并行进化针对信息素受体基因

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摘要

Evolution can follow predictable genetic trajectories1, indicating that discrete environmental shifts can select for reproducible genetic changes2-4. Conspecific individuals are an important feature of an animal's environment, and a potential source of selective pressures. Here we show that adaptation of two Caenorhabditis species to growth at high density, a feature common to domestic environments, occurs by reproducible genetic changes to pheromone receptor genes. Chemical communication through pheromones that accumulate during high-density growth causes young nematode larvae to enter the long-lived but non-reproductive dauer stage.%已故的Stephlen、Jay GOLJld问：如果我们能将地球恢复到原始状态，我们会将同一演化影片重放一遍吗?McGrath等人以线虫驯化这样一个比较简单的情形为例，发现两个Caenorhabditiselegans(线虫)分支和C,briggsae(一个在大约2，000万年前从elegans分出的物种)独立积累了在一组保守的信息素受体基因中发生的突变，从而减小了线虫在过分拥挤条件下进行“冬眠”的自然趋势。适应过程中的这种收敛表明，演化的确是非常具有可重现性的，至少在一些特定的环境限制条件下是如此。
机译：Evolution can follow predictable genetic trajectories1, indicating that discrete environmental shifts can select for reproducible genetic changes2-4. Conspecific individuals are an important feature of an animal's environment, and a potential source of selective pressures. Here we show that adaptation of two Caenorhabditis species to growth at high density, a feature common to domestic environments, occurs by reproducible genetic changes to pheromone receptor genes. Chemical communication through pheromones that accumulate during high-density growth causes young nematode larvae to enter the long-lived but non-reproductive dauer stage.%已故的Stephlen、Jay GOLJld问：如果我们能将地球恢复到原始状态，我们会将同一演化影片重放一遍吗?McGrath等人以线虫驯化这样一个比较简单的情形为例，发现两个Caenorhabditiselegans(线虫)分支和C,briggsae(一个在大约2，000万年前从elegans分出的物种)独立积累了在一组保守的信息素受体基因中发生的突变，从而减小了线虫在过分拥挤条件下进行“冬眠”的自然趋势。适应过程中的这种收敛表明，演化的确是非常具有可重现性的，至少在一些特定的环境限制条件下是如此。

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  • 来源
    《Nature》 |2011年第7364期|p.321-325a25|共6页
  • 作者

    Patrick T. McGrath; Yifan Xu; Michael Ailion; Jennifer L. Garrison; Rebecca A. Butcher; Cornelia I. Bargmann;

  • 作者单位

    Howard Hughes Medical Institute, Laboratory of Neural Circuits and Behavior, The Rockefeller University, New York, New York 10065, USA;

    Howard Hughes Medical Institute, Laboratory of Neural Circuits and Behavior, The Rockefeller University, New York, New York 10065, USA;

    Department of Biology, University of Utah, Salt Lake City, Utah 84112, USA;

    Howard Hughes Medical Institute, Laboratory of Neural Circuits and Behavior, The Rockefeller University, New York, New York 10065, USA;

    Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA;

    Howard Hughes Medical Institute, Laboratory of Neural Circuits and Behavior, The Rockefeller University, New York, New York 10065, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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