Lost and found

Neil H. Shubin; Randall D. Dahn

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Lost and found

机译：失物招领

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Can we ever hope to pin down the genetic changes that underlie the big steps in evolution? Possibly so, if a study of the variation in the pelvic fins of sticklebacks is anything to go by. Darwin's lament that "Our ignorance of the laws of variation is profound" has described one of the persistent problems in evolutionary biology for the past 145 years. How does genetic variation -- the raw material of evolution -- arise within populations, and how does it evolve to make species anatomically and behaviourally distinct? Ultimately, answers to these questions will be derived from understanding the actual genetic changes that control the evolution of anatomy or behaviour. These insights could explain a host of puzzles, from how rapid evolutionary change can occur in populations, to why morphological evolution often follows certain well-defined trends. On page 717 of this issue, Shapiro et al. describe the genetic basis for one such trend: limb reduction in threespine stickleback fish.

机译：我们是否可以希望阻止构成进化重大步骤的遗传变化？可能的话，如果要研究棘背式骨盆鳍的变化就可以了。达尔文感叹“我们对变异定律的无知是深刻的”描述了过去145年中进化生物学中持续存在的问题之一。遗传变异是进化的原材料，它是如何在种群中产生的，又如何进化以使物种在解剖学和行为上与众不同？最终，这些问题的答案将来自对控制解剖结构或行为演变的实际遗传变化的理解。这些见解可能解释了许多难题，从人口中快速的进化变化如何发生，到为什么形态演变通常遵循某些明确定义的趋势。在此问题的第717页上，Shapiro等人。描述这种趋势的遗传基础：三脊棘背鱼的肢体减少。

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《Nature》 |2004年第6984期|p.703-704|共2页
作者
Neil H. Shubin; Randall D. Dahn;
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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);
原文格式 PDF
正文语种 eng
中图分类自然科学总论;
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Lost and found

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